EP0160710B1 - Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber - Google Patents

Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber Download PDF

Info

Publication number
EP0160710B1
EP0160710B1 EP84104955A EP84104955A EP0160710B1 EP 0160710 B1 EP0160710 B1 EP 0160710B1 EP 84104955 A EP84104955 A EP 84104955A EP 84104955 A EP84104955 A EP 84104955A EP 0160710 B1 EP0160710 B1 EP 0160710B1
Authority
EP
European Patent Office
Prior art keywords
push button
housing
bore
contact switch
reed contact
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
EP84104955A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0160710A1 (de
Inventor
Klaus Hauk
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to EP84104955A priority Critical patent/EP0160710B1/de
Priority to AT84104955T priority patent/ATE42428T1/de
Priority to DE8484104955T priority patent/DE3477862D1/de
Priority to ES542731A priority patent/ES8607610A1/es
Priority to CA000480598A priority patent/CA1235171A/en
Priority to ZA853334A priority patent/ZA853334B/xx
Priority to JP60095870A priority patent/JPS6122525A/ja
Publication of EP0160710A1 publication Critical patent/EP0160710A1/de
Application granted granted Critical
Publication of EP0160710B1 publication Critical patent/EP0160710B1/de
Expired legal-status Critical Current

Links

Images

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
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/004—Permanent magnet actuating reed switches push-button-operated, e.g. for keyboards

Definitions

  • the invention relates to a reed contact switch with a housing, a pulse generator, a contact carrier and an inner bore provided in the pulse generator, the pulse generator being slidably received in a bore of the housing, with pockets for foreign bodies being provided on the region of the pulse generator extending in the bore , and wherein the contact carrier and the pulse generator between two end positions are relatively displaceable to one another and in one end position the inner bore can be ventilated and / or vented via at least one outlet opening.
  • the pulse generator is hexagonal over part of its length and is guided loosely and axially displaceably in the round bore in the housing.
  • channels extending from the inner bore extend through the pulse generator to the bore. The liquid or the gas can penetrate into the channels, openings, the bore and the inner bore; due to these numerous connections and the loose guidance of the pulse generator in the housing, however, no negative or positive pressure can arise which could impair the movement of the pulse generator.
  • This reed contact switch cannot be used in an environment in which it comes into spray contact with viscous and contaminated liquid, i.e. H. if the medium acting on it can no longer rinse out the foreign bodies that have penetrated it. Such an application results, for. B. when installed in a gearbox or motor housing.
  • the object on which the invention is based is therefore seen in developing a reed contact switch of the aforementioned type which does not adversely affect its mobility even when in constant contact with lubricating oil and iron particles contained therein.
  • the collecting pockets are designed as grooves which allow the foreign bodies to enter easily, and in particular in that the collecting pockets are designed as longitudinal grooves incorporated in the lateral surface of the pulse generator and / or housing, and collect them properly when there is a displacement takes place in the direction of the longitudinal axis.
  • the invention accordingly provides that in one end position the inner bore can be ventilated and / or vented while it is closed in the other.
  • a reed contact switch in which the pulse generator has an actuating surface and exits the housing in an end position the ventilation and / or ventilation is created in such a way that openings for ventilation and / or ventilation are provided immediately below the actuating surface.
  • a reed contact switch 10 has as its essential components a housing 12, a pulse generator 14, a glass tube 16 acting as a contact carrier, a switching element 18, a ring magnet 20, a base 22, contacts 24 and a compression spring 26.
  • a housing 12 a pulse generator 14
  • a glass tube 16 acting as a contact carrier
  • a switching element 18 a ring magnet 20
  • contacts 24 contacts 24
  • a compression spring 26 a compression spring 26.
  • the housing 12 is preferably made of steel and is composed of a cylindrical hollow body 28 and a hexagonal base 30. However, it is also possible to form this from a different metal or from a durable plastic. This is located at the lower end of the hollow body 28 and is formed with this as a single part. Immediately above the transition from the hexagonal base 30 to the hollow body 28, a thread 32 worked on the jacket of the hollow body 28 ends, which extends from there over approximately half the length of the hollow body 28 and by means of which the reed contact switch 10 into a housing or into a Holder can be screwed in.
  • a stepped bore 34 provided therein and having a small diameter area 36 emerges therefrom via an outwardly opening 45 ° chamfer 38, the meaning of which will be explained in more detail later .
  • the stepped bore 34 also has an area of medium and an area of large diameter 40 and 42, the area of small diameter 36 taking up approximately one eighth of the length of the hollow body 28, and the area of medium diameter 40 following this connects at the bottom and extends slightly into the hexagon foot 30 and the area of large diameter 42 leads from there to the lower end of the hexagon foot 30. This results in an upper step 44 at the transition from the small 36 area to the medium diameter area 40 and a lower step 46 at the transition from the medium area 40 to the large diameter area 42.
  • the pulse generator 14 is slidably inserted in the stepped bore 34 and is provided with a slim and a wide piston section 48 and 50, each of which comes into contact with the stepped bore 34.
  • the outside diameter of the slim piston section 48 corresponds almost to the inside diameter of the stepped bore 34 in the area of the small diameter 36, while the wide piston section 50 in the outside diameter corresponds to the inside diameter of the stepped bore 34 in the area of the middle diameter 40. This dimensioning enables the pulse generator 14 to always slide along the inner wall of the stepped bore 34 between two end positions, to be adequately guided in this position and, depending on the manufacturing tolerances, to seal against it.
  • the slim piston section 48 takes up about a fifth of the total length of the pulse generator 14 and has at its upper end a spherically shaped, semicircular crest 52 as an actuating surface, below which there are a plurality of pressure compensation bores 54 into one in the pulse generator 14 from the outside arranged stepped inner or longitudinal bore 56 extend. Provisions are to be made that in an end position of the pulse generator 14 there is a connection between the longitudinal bore 56 and the surroundings of the reed contact switch.
  • This longitudinal bore 56 extends from below the semicircle made of solid material to the lower end of the wide piston section 50 and is expanded in its last quarter to form a chamber 58 for receiving the ring magnet 20.
  • pockets 60 are milled into the outer surface of the wide piston section 50, diametrically opposite and aligned axially, which are intended to retain dirt and iron parts, as will be described later .
  • the upper end of the pockets 60 also marks the transition between the slim and the wide piston sections 48 and 50, and a shoulder 62 resulting there can be brought into abutment against the upper step 44.
  • the pockets 60 which because of their function can be regarded as collecting pockets for foreign bodies, are thus connected to the sliding surface and collect dirt particles attached to it during the displacement process. A similar effect would also occur if the pockets were machined into the inner wall of the stepped bore 34.
  • the ring magnet 20 is held in the chamber 58 by means of adhesive or by means of a press fit and is flush at its lower end with the wide piston section 50. Its inside diameter corresponds to the diameter of the longitudinal bore 56 above the chamber 58.
  • the longitudinal bore 56 in turn surrounds the glass tube 16, which has an outer diameter over approximately 5/6 of its length, which likewise almost corresponds to the inner diameter of the longitudinal bore 56. It is only in the area in the area of its remaining length that it is widened to approximately five times the diameter in order to create an enlarged cavity 64 for receiving the switching element 18. This shape results in a shoulder 66 with an upper ring surface 68 on the outer surface of the glass tube 16, which comes to bear against the lower step 46.
  • the outer diameter of the glass tube 16 in the region of the cavity 64 in turn corresponds approximately to the inner diameter of the stepped bore 34 in the region of large diameter 42, so that the glass tube 16 is firmly seated in the housing 12.
  • the switching element 18 is embedded in protective gas, and in simple terms it consists of two conductor ends 70, 72 which can be brought into contact with one another and which, as soon as the ring magnet 20 is one has assumed a certain position to these, touch under the action of the magnetic field acting in this and thus allow a current to pass through to a relay, not shown.
  • the conductor ends 70, 72 open into the base 22, from where they are connected to a correspondingly constructed circuit, also not shown, via the contacts 24, which are cast into the stepped bore 34 in the region of large diameter 42 and into the cavity 64 can.
  • the compression spring 26 is located between the lower end of the pulse generator 14 and the upper ring surface 68 of the glass tube 16 in order to exert a force directed away from the glass tube 16 on the pulse generator 14.
  • the glass tube 16, the housing 12, the base 22 and the switching element 18 together form a rigid unit, against which only the pulse generator 14 and the ring magnet 20 are movably arranged under the action of the compression spring 26. The movement takes place in the direction of the central longitudinal center axis of the reed contact switch 10.
  • the pulse generator 14 Due to the compression spring 26 at one end and the system of paragraph 62 at the upper stage 44 at the other end, the pulse generator 14 can only execute a small stroke between an upper and a lower end position, which is usually only so large that when the Compression spring 26 sits on block, the dome 52 still protrudes over the housing 12.
  • the switching element 18 is closed or opened due to the position of the magnetic field built up within the ring magnet 20 relative to the conductor ends 70, 72.
  • This reed contact switch 10 is used in the control of a starter circuit of an internal combustion engine for a tractor with a transmission, which for safety reasons should only be started via an electric starter when the transmission has assumed a neutral position.
  • the ring magnet 20 with the pulse generator 14 should assume a position which causes the switching element 18 to be open and thus a current flow from an ignition lock to the electrical starter cannot take place.
  • a cam is placed on a decisive shift rod, which pushes the pulse generator 14 into the housing 12 as long as the shift rod is in a neutral position. In this position, the switching element 18 is closed and the internal combustion engine can be started.
  • the installation of the reed contact switch 10 in a transmission also results in it being exposed to lubricating oil and abraded iron particles contained therein. Due to the relative movement of the pulse generator 14 with respect to the glass tube 16 and the housing 12 and the gaps that are still present between them, however small, a pump effect arises with each stroke of the pulse generator 14, due to its lubricating oil with the iron particles and other deposits mentioned in the Column is sucked in. In order to prevent this lubricating oil from being trapped between the glass tube 16 and the upper end of the longitudinal bore 56, the pressure compensation bores 54 are provided through which the lubricating oil which has entered can be pumped out again.
  • the 45 ° chamfer 38 at the upper end of the housing 12 results in a drip edge which, when the reed contact switch 10 is installed horizontally or at an angle, causes the lubricating oil to drip off, thus making it virtually impossible for it to penetrate into the gaps. Iron particles which have nevertheless penetrated into the gap between the pulse generator 14 and the housing 12 settle in the pockets 60 and do not get into the gap between the wide piston section 50 in the region of the chamber 58 and the stepped bore 34 in the region of the medium diameter 40, so that there blocking of the sliding movement of the pulse generator 14 is prevented.
EP84104955A 1984-05-03 1984-05-03 Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber Expired EP0160710B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP84104955A EP0160710B1 (de) 1984-05-03 1984-05-03 Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber
AT84104955T ATE42428T1 (de) 1984-05-03 1984-05-03 Reedkontaktschalter mit einem gehaeuse und einem impulsgeber.
DE8484104955T DE3477862D1 (en) 1984-05-03 1984-05-03 Reed switch with a housing and a push button
ES542731A ES8607610A1 (es) 1984-05-03 1985-04-30 Interruptor de contacto reed
CA000480598A CA1235171A (en) 1984-05-03 1985-05-02 Reed switch with a housing and a pulse generator
ZA853334A ZA853334B (en) 1984-05-03 1985-05-03 Reed contact switch comprising a housing and a pulse generator
JP60095870A JPS6122525A (ja) 1984-05-03 1985-05-04 異物粒子収集ポケツトを備えるリ−ドスイツチ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84104955A EP0160710B1 (de) 1984-05-03 1984-05-03 Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber

Publications (2)

Publication Number Publication Date
EP0160710A1 EP0160710A1 (de) 1985-11-13
EP0160710B1 true EP0160710B1 (de) 1989-04-19

Family

ID=8191916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104955A Expired EP0160710B1 (de) 1984-05-03 1984-05-03 Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber

Country Status (7)

Country Link
EP (1) EP0160710B1 (es)
JP (1) JPS6122525A (es)
AT (1) ATE42428T1 (es)
CA (1) CA1235171A (es)
DE (1) DE3477862D1 (es)
ES (1) ES8607610A1 (es)
ZA (1) ZA853334B (es)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421124A (en) * 1967-03-17 1969-01-07 Joseph V Kidd Detector switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1515675A1 (de) * 1965-08-02 1969-08-14 Elektrosteuerung Rudolf Dinneb OEl-,feuchtigkeits- und staubdichte Tasteneinheit
DE1966763U (de) * 1967-04-22 1967-08-24 Eduard Hermle Elektrische schaltvorrichtung.
FR1574161A (es) * 1968-05-16 1969-07-11
US3613041A (en) * 1969-12-15 1971-10-12 Kysor Industrial Corp Thermal-responsive switch
US3622926A (en) * 1970-03-12 1971-11-23 George Risk Magnetically actuatable reed switch assembly
US3717737A (en) * 1970-07-04 1973-02-20 Alps Electric Co Ltd Resilient omnidirectional push-button for an electrical switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421124A (en) * 1967-03-17 1969-01-07 Joseph V Kidd Detector switch

Also Published As

Publication number Publication date
ES542731A0 (es) 1986-05-16
EP0160710A1 (de) 1985-11-13
ES8607610A1 (es) 1986-05-16
ZA853334B (en) 1987-01-28
DE3477862D1 (en) 1989-05-24
ATE42428T1 (de) 1989-05-15
CA1235171A (en) 1988-04-12
JPS6122525A (ja) 1986-01-31

Similar Documents

Publication Publication Date Title
EP0381069A1 (de) Kupplungsmuffe für hydraulische Leitungsverbindung
DE19707041A1 (de) Schnellverbindevorrichtung
DE2952037A1 (de) Vorrichtung zum abschalten von hubventilen einer brennkraftmaschine
DE2751431A1 (de) Entlueftungsventileinrichtung fuer druckgiessformen
DE3013381C2 (de) Arbeitskolben-Zylinder-Einheit
DE3413935A1 (de) Verbindungseinrichtung zur verbindung elektrisch leitfaehiger kontaktteile
DE2741867A1 (de) Vorrichtung zur entsperrbaren verriegelung eines schaltgliedes
EP0066274A1 (de) Ventilanordnung zur Erhöhung der Ausfahrgeschwindigkeit eines Arbeitszylinders
DE3909744A1 (de) Seilbetaetigte schnellabschaltvorrichtung
DE3013835A1 (de) Verriegelungsvorrichtung fuer zwei druckknoepfe
EP0160710B1 (de) Reedkontaktschalter mit einem Gehäuse und einem Impulsgeber
DE102017109003A1 (de) Zweidruckventil
DE2457819C2 (de) Detektor für Druckdifferenzen
DE2413884A1 (de) Ventil
DE3810273A1 (de) Ausrastbarer handhebel
DE3532988C2 (de) Elektrohydraulische Schaltvorrichtung
EP0118910B1 (de) Schliesszylinder
DE2141032A1 (de) Vorrichtung zum geradlinigen Verschieben eines Bauteiles
DE3605388A1 (de) Elektrohydraulische schaltvorrichtung
DE3015601A1 (de) Schnellverschlusskupplung fuer insbesondere hydraulikleitungen
DE10026799B4 (de) Hydraulischer Zylinder, insbesondere Kupplungsgeberzylinder, mit verbesserten Mitteln zum axialen Halten der Stange und des Kolbens
DE3215243C2 (es)
DE2824458C2 (es)
DE3041006C2 (es)
EP0074419A1 (de) Elektrischer Hochleistungsschalter mit hydraulischer Betätigungsvorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860403

17Q First examination report despatched

Effective date: 19870720

ITF It: translation for a ep patent filed

Owner name: LENZI & C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890419

Ref country code: NL

Effective date: 19890419

REF Corresponds to:

Ref document number: 42428

Country of ref document: AT

Date of ref document: 19890515

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3477862

Country of ref document: DE

Date of ref document: 19890524

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890531

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930428

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930513

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930519

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940503

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940531

Ref country code: CH

Effective date: 19940531

Ref country code: BE

Effective date: 19940531

BERE Be: lapsed

Owner name: DEERE & CY

Effective date: 19940531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950418

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950516

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950715

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960503

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST