EP0181733A1 - Commutateur électrique chirurgical - Google Patents

Commutateur électrique chirurgical Download PDF

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Publication number
EP0181733A1
EP0181733A1 EP85307817A EP85307817A EP0181733A1 EP 0181733 A1 EP0181733 A1 EP 0181733A1 EP 85307817 A EP85307817 A EP 85307817A EP 85307817 A EP85307817 A EP 85307817A EP 0181733 A1 EP0181733 A1 EP 0181733A1
Authority
EP
European Patent Office
Prior art keywords
pin
plate
contact
dome
assembly according
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Withdrawn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
EP85307817A
Other languages
German (de)
English (en)
Inventor
Charles R. Braxton
Alan C. Fritze
Todd C. Green
William A. Johnk
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.)
Valleylab Inc
Original Assignee
Valleylab 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 Valleylab Inc filed Critical Valleylab Inc
Publication of EP0181733A1 publication Critical patent/EP0181733A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/08—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/014—Application surgical instrument

Definitions

  • the invention is related to an electrosurgical switch assembly making use of a resilient conductive contact dome mounted over a contact pin to establish, on depressing said dome, an electrical current to an electrode which is attached to said switch.
  • Electrosurgical switch assemblies for use in surgical cutting and coagulating are known. Often, such switch assemblies are disposable so that low cost construction is important.
  • the assembly of the invention makes use of a resilient dome which is known as such in the manufacture of switching assemblies as disclosed in U.S. Patents 3,967,084 and 4,359,614.
  • the present assembly further makes use of low cost materials and parts which are capable of performing multiple functions as will be explained hereafter.
  • an electrical switch assembly comprises an insulative base
  • Fig. 1 shows the insulative base (10) which is the building block of the assembly receiving and locating the remaining parts of the invention.
  • the base is made of an insulative material such as plastic, e.g. general purpose nylon plastic molding compound Zytel
  • a power conductor plate (12) is mounted on the base and terminates in means (14) for connection to an electrode (not shown).
  • the plate is made from known metals or metal alloys such as copper alloys, e.g. phosphor bronze.
  • the plate may have side panels gripping the insulative base and having fasteners therethrough such as pins to provide a reliable connection between the plate and the base.
  • Contact pins (16, 18, 20) act as stationary switch contacts, terminations for wires (22, 24, 26) contained in cable (28), current carriers between the wires and the power conductor plate and fasteners holding the assembly together.
  • the pins are generally made from brass.
  • Pin 16 is in contact with plate 12 whereas contact pins 18 and 20 are not. Apertures (30, 32) in the conductor plate avoid such contact between the plate and the pins.
  • Pins 18 and 20 may rest on the insulative base or there may be some clearance between the bottom of pin heads 18 and 20 and the top of the insulative base.
  • the three pins 16, 18 and 20 are embedded in the insulative base. They pierce wires 22, 24 and 26, respectively, to establish the necessary electric contact with the wires.
  • F ig. 2 shows an insulative casing (34) containing the insulative base (10), the power conductor plate (12) and the contact pins (16, 18, 20).
  • the insulative material used is generally a plastic material, e.g. Surlyn .
  • the casing provides the assembly with structural rigidity and strength.
  • the switch assembly must be able to withstand fluids which are commonly present in the operation room, for instance, blood, alcohol, water and saline solutions, since these fluids are capable of short circuiting on penetrating the switch assembly. Because of the chemical composition of certain of these fluids, the switch assembly parts may be adversely affected due to degradation and erosion.
  • the casing therefore provides fluid resistance to the assembly.
  • Resilient conductive contact domes (36, 38) are mounted on the power conductor plate over contact pins (18 and 20, respectively). Openings (e.g. 42) are provided in the casing to receive the contact domes so that electrical contact is established between the contact domes and the power conductor plate.
  • the contact domes are generally in the shape of a dome having a central region of substantially planar configuration from which the remainder of the dome slants downwardly and outward to a lower rim portion. Conveniently, the lower rim portion rests on the power conductor plate to establish the necessary electrical contact with the power conductor plate.
  • the contact domes are designed such that, on depression, the desired tactile response is attained with minimum physical space requirements.
  • the contact dome is made of any resilient material allowing for depression of the dome to establish electrical contact with the contact pin and complete the switching circuit. A suitable material for the dome is for instance resilient stainless steel.
  • the assembly may have a resilient insulative cover (40) mounted over the contact domes to avoid direct contact with the dome on depression thereof.
  • the cover provides fluid resistance to the assembly.
  • Such cover is conveniently made of the same material as the insulative casing, e.g. the above-mentioned Surlyng) material in the form of an acrylic adhesive- backed film.
  • Fig. 3 shows the electrical wiring of the switch of the invention. As mentioned above, wire 22 is connected with pin 16, wire 24 with pin 18 and wire 26 with pin 20. Part of the power conductor plate in Fig. 3 is broken away to show wire 24.
  • F ig. 4 shows the switch of the invention with the resilient insulative cover and contact dome 36 impressed to have the dome contact pin 18.
  • an insulative enclosure is mounted over said casing and said cover to provide an additional dielectric barrier to high voltage breakdown of the assembly and a means to comfortably hold the assembly during use.
  • the enclosure must allow for access to the contact dome usually by having an opening at the position of the contact dome or by having resilient material at that position allowing for depression of the contact dome.
  • Suitable materials for manufacture of the enclosure are plastic materials such as polystyrene.
  • the assembly of the invention may have more than two contact pins.
  • a third contact pin 20 is embedded in the insulative base projecting through an aperture (32) in the power conductor plate, and a second resilient conductive contact dome (38) mounted on said plate over said third pin and projecting through said casing, said third pin provided with means (26) for connection to a power source of differing voltage from that of the power source connected to said second pin (18).
  • a fourth contact pin and a third resilient contact dome may be present.
  • the above-mentioned resilient insulative cover may of course also be mounted over such additional contact pins.
  • an electrical current is delivered to the electrode connected with the power conductor plate.
  • the electrode may be used for electrosurgical procedures such as cutting or coagulating.
  • An electrosurgical switch having one contact dome may be used either in cutting or coagulating.
  • a switch having two contact domes may be used for cutting and coagulating depending on which contact dome is depressed. Additional domes may be used for additional procedures.
  • the electrode connected to the power conductor plate may be fixedly attached to the plate or, preferably, may be removably mounted thereon.
  • Standardized, removable electrosurgical electrodes are available on the market.
  • the electrode's working end is shaped such that a spark is delivered to do the cutting, coagulating, etc.
  • a conventional rocker or button device may be mounted over the above mentioned two contact domes to facilitate depression of the domes.

Landscapes

  • Surgical Instruments (AREA)
  • Push-Button Switches (AREA)
EP85307817A 1984-10-29 1985-10-29 Commutateur électrique chirurgical Withdrawn EP0181733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66547584A 1984-10-29 1984-10-29
US665475 1984-10-29

Publications (1)

Publication Number Publication Date
EP0181733A1 true EP0181733A1 (fr) 1986-05-21

Family

ID=24670257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85307817A Withdrawn EP0181733A1 (fr) 1984-10-29 1985-10-29 Commutateur électrique chirurgical

Country Status (3)

Country Link
EP (1) EP0181733A1 (fr)
JP (1) JPS61109227A (fr)
AU (1) AU4911785A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226904A (en) * 1991-02-08 1993-07-13 Conmed Corporation Electrosurgical instrument
US5376089A (en) * 1993-08-02 1994-12-27 Conmed Corporation Electrosurgical instrument
EP3001968A1 (fr) * 2014-09-23 2016-04-06 Covidien LP Protection d'entrée d'interrupteur de crayon électro-chirurgical

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911241A (en) * 1972-12-15 1975-10-07 Neomed Inc Switching device for electro-surgical instruments
US4032738A (en) * 1975-05-15 1977-06-28 Neomed Incorporated Electro-surgical instrument
DE2902353A1 (de) * 1979-01-22 1980-07-31 Licentia Gmbh Tastenfeld mit mehreren tastschaltern
US4427006A (en) * 1982-01-18 1984-01-24 Medical Research Associates, Ltd. #1 Electrosurgical instruments

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS438419Y1 (fr) * 1965-09-02 1968-04-15

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911241A (en) * 1972-12-15 1975-10-07 Neomed Inc Switching device for electro-surgical instruments
US4032738A (en) * 1975-05-15 1977-06-28 Neomed Incorporated Electro-surgical instrument
DE2902353A1 (de) * 1979-01-22 1980-07-31 Licentia Gmbh Tastenfeld mit mehreren tastschaltern
US4427006A (en) * 1982-01-18 1984-01-24 Medical Research Associates, Ltd. #1 Electrosurgical instruments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MACHINE DESIGN, vol. 53, no. 13, June 1981, Cleveland, Ohio, US; article "Double-wall cable stops surgical-pen shorts", page 54 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226904A (en) * 1991-02-08 1993-07-13 Conmed Corporation Electrosurgical instrument
US5376089A (en) * 1993-08-02 1994-12-27 Conmed Corporation Electrosurgical instrument
EP3001968A1 (fr) * 2014-09-23 2016-04-06 Covidien LP Protection d'entrée d'interrupteur de crayon électro-chirurgical
US9986984B2 (en) 2014-09-23 2018-06-05 Covidien Lp Ingress protection for electrosurgical pencil switch
US11219433B2 (en) 2014-09-23 2022-01-11 Covidien Lp Ingress protection for electrosurgical pencil switch

Also Published As

Publication number Publication date
AU4911785A (en) 1986-05-08
JPS61109227A (ja) 1986-05-27

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Effective date: 19880712

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GREEN, TODD C.

Inventor name: FRITZE, ALAN C.

Inventor name: BRAXTON, CHARLES R.

Inventor name: JOHNK, WILLIAM A.