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EP3764476A1 - Elektrische verbindungsvorrichtung - Google Patents

Elektrische verbindungsvorrichtung Download PDF

Info

Publication number
EP3764476A1
EP3764476A1 EP19185320.9A EP19185320A EP3764476A1 EP 3764476 A1 EP3764476 A1 EP 3764476A1 EP 19185320 A EP19185320 A EP 19185320A EP 3764476 A1 EP3764476 A1 EP 3764476A1
Authority
EP
European Patent Office
Prior art keywords
barrel
hollow piston
electrical connection
connection device
cap
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.)
Pending
Application number
EP19185320.9A
Other languages
English (en)
French (fr)
Inventor
designation of the inventor has not yet been filed The
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.)
Preci Dip SA
Original Assignee
Preci Dip SA
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 Preci Dip SA filed Critical Preci Dip SA
Priority to EP19185320.9A priority Critical patent/EP3764476A1/de
Publication of EP3764476A1 publication Critical patent/EP3764476A1/de
Pending 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
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs

Definitions

  • This invention generally concerns an electrical connector used in particular in electronic devices such as portable video cameras.
  • One purpose of this invention is to address the disadvantages of the above-mentioned prior art document and in particular, to provide an electrical connector with a higher operating stroke.
  • a first aspect of the invention concerns a Electrical connection device comprising a barrel comprising a first end on which a cap is mounted, a hollow piston comprising an open end and a blind end, the piston being slidably mounted in the barrel so that the blind end extends beyond a second end of the barrel and a helical spring characterized in that the electrical connection device comprises a spring clip mounted between the barrel and the hollow piston so as to provide electrical continuity between the barrel and the hollow piston, the first end of the helical spring being housed in the hollow piston and a second end of the helical spring bearing on the cap so that the maximum insertion position of the hollow piston into the barrel is obtained when the open end of the hollow piston comes into contact with the cap.
  • the cap includes a centering pin on the second end of the helical spring.
  • a free end of the centering pin extends beyond the second end of the barrel.
  • the spring clip is fixedly mounted with respect to the barrel.
  • the second end of the barrel includes a flange arranged to form a means of guiding the sliding movement of the hollow piston.
  • the spring clip forms a tube, so a first end of the spring clip rests on the cap and a second end extends beyond the second end of the barrel.
  • the spring clip comprises at least one elastic finger pressing an external surface of the hollow piston.
  • elastic finger extends beyond the second end of the barrel.
  • elastic finger extends outwardly relative to the hollow piston.
  • the external surface of the hollow piston comprise a groove receiving the spring clips
  • the spring clip forms a tube, so a first end of the spring clip rests on the cap and a second end has a tronconical shape.
  • the electrical connector 1 includes a barrel 10, for example cylindrical in shape.
  • a first end 11 of barrel 10 includes a cap 20 mounted, for example, by stamping on the barrel 10.
  • Another method of assembling the cap 20 to the first end 11 of the barrel 10 can be used such as crimping or welding. Electrical continuity is then ensured between the barrel 10 and the cap 20.
  • Connector 1 also includes a hollow piston 40 mounted sliding in the barrel 10.
  • the hollow piston 40 has, in a known manner, a blind end 42 and an open end 41.
  • a helical spring 60 is mounted inside the hollow piston 40.
  • a first end 61 of the helical spring 60 is supported at the bottom of the hollow piston 40 at the blind end 42 while a second end 62 of the helical spring 60 is supported on the cap 20.
  • a centering pin or stud 21 of the helical spring 60 can be formed in an orthogonal direction on the cap 20. The helical spring 60 is then inserted on the centering pin or pin 21. The centering pin or pin 21 prevents the helical spring 60 from deforming laterally during compression.
  • the helical spring 60 can be replaced by any other elastic means of similar geometry and performing the elastic return function.
  • electrical connector 1 also includes a spring clip 50 mounted between barrel 10 and hollow piston 40.
  • the spring clip 50 is mounted on the one hand against the inner surface 13 of the barrel 10 and on the other hand against the outer surface 44 of the hollow piston 40.
  • the spring clip 50 therefore ensures electrical continuity between barrel 10 and hollow piston 40.
  • the spring clip 50 is fixed to the barrel 10 and can be mounted in the barrel 10 by press-fitting or any other method known per se such as crimping or welding.
  • the sliding movement of the hollow piston 40 is carried out by sliding on the spring clip 50.
  • the spring clip 50 is tubular in shape.
  • a first end 51 of the spring clip 50 is mounted against the cap 20, a second end 52, for example in a frustoconical/tronconical shape, forms the sliding area of the hollow piston 40.
  • the second end can be formed by fingers 23 or tabs forming the frustoconical/tronconical shape, for example.
  • the fingers 23 or tabs increase the elasticity of the spring clip 50 at the contact interface with the piston, which improves the guidance of the hollow piston 40 in its sliding movement.
  • the fingers 23 comprise a first end integral with a substantially cylindrical portion of the spring clip 50 and a second free end in contact with the hollow piston 40.
  • the second free end can be bent outwards, i. e. away from the outer surface 43 of the hollow piston 40.
  • the contact surface between the spring clip 50 and the hollow piston 40 is rounded, which facilitates sliding and improve electrical contact.
  • the second end 52 of the spring clip 50 extends beyond the second free 12 end of the barrel 10, i.e. the second end of the spring clip 50 is not facing a portion of the barrel 10.
  • the bottom of the hollow piston 40 has a concave conical surface against which the second end of the helical spring is supported.
  • the rod or stud 21 can extend beyond the second end 12 of barrel 10. By lengthening, the length of the rod or pin 21 improves the centering and holding of the first end 61 of the helical spring 60.
  • the external diameter of the open end 41 of the hollow piston 40 could be greater than the internal diameter of the second end 52 of the spring clip 50. Then, the friction force of the spring clip 50 higher in this area than the ejection force of the helical spring 60. This will avoid ejection of the hollow piston 40 from the spring clip 50 due to the helical spring 60.
  • Figures 2 to 4 represent a second embodiment of the electrical connector 1.
  • This embodiment differs from the first one by a barrel 10 of different structure.
  • the spring clip 50 is fully housed in the inner volume of the barrel 10, in other words, the second end 12 of the barrel extends beyond the second end 52 of the spring clip 50.
  • the second end comprises, for example, a lip 14 extending towards the inside of the barrel 10 in a plane substantially perpendicular to the longitudinal axis of the barrel 10. This lip actually closes the opening at the second end 12 of the barrel 10 so that the clearance between the outer surface of the hollow piston 40 and the lip 14 is as small as possible.
  • the first end 51 of spring clip 50 is spaced from the cap 20.
  • Barrel 10, cap 20 and hollow piston 40 can be produced by processes known per se, such as deep drawing, forging, cold heading.
  • the material used is a conductive metal alloy such as brass, phosphor bronze, beryllium-copper alloy.
  • Barrel 10, cap 20 and hollow piston 40 may include a coating to improve their electrical contact, wear and corrosion resistance.
  • Spring clip 50 is generally manufactured using a deep-drawing/forming process on a progressive deep-drawing die using a high-temperature copper alloy, such as beryllium-copper or another high-conductivity, high-temperature alloy.
  • a high-temperature copper alloy such as beryllium-copper or another high-conductivity, high-temperature alloy.
  • the helical spring 60 is a compression spring that is made from a variety of materials, such as stainless steel, beryllium-copper, other alloys, including high temperature alloys.
  • the helical spring 60 can be plated or not.
  • Figures 2 and 3 represent the two extreme positions of the hollow piston 40 of the electrical connector according to the invention: extended - pressed.
  • the maximum deployment position is defined, for example, by the position of the grooves 43 of the hollow piston 40.
  • the stroke of the hollow piston 40 is therefore increased compared to the connector of the anterior art.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP19185320.9A 2019-07-09 2019-07-09 Elektrische verbindungsvorrichtung Pending EP3764476A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19185320.9A EP3764476A1 (de) 2019-07-09 2019-07-09 Elektrische verbindungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19185320.9A EP3764476A1 (de) 2019-07-09 2019-07-09 Elektrische verbindungsvorrichtung

Publications (1)

Publication Number Publication Date
EP3764476A1 true EP3764476A1 (de) 2021-01-13

Family

ID=67226056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19185320.9A Pending EP3764476A1 (de) 2019-07-09 2019-07-09 Elektrische verbindungsvorrichtung

Country Status (1)

Country Link
EP (1) EP3764476A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4080684A1 (de) * 2021-04-20 2022-10-26 Preci-Dip Sa Kolbenanordnung und federbelasteter kontakt
WO2022223474A1 (en) * 2021-04-20 2022-10-27 Preci-Dip Sa Piston assembly and spring-loaded contact

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
EP0838878A1 (de) * 1997-02-04 1998-04-29 Durtal SA Federkontaktelement
US20180323529A1 (en) * 2016-03-08 2018-11-08 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Spring-loaded contact pin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904213A (en) * 1989-04-06 1990-02-27 Motorola, Inc. Low impedance electric connector
EP0838878A1 (de) * 1997-02-04 1998-04-29 Durtal SA Federkontaktelement
US20180323529A1 (en) * 2016-03-08 2018-11-08 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Spring-loaded contact pin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4080684A1 (de) * 2021-04-20 2022-10-26 Preci-Dip Sa Kolbenanordnung und federbelasteter kontakt
WO2022223474A1 (en) * 2021-04-20 2022-10-27 Preci-Dip Sa Piston assembly and spring-loaded contact

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