EP0355634B1 - Elektrischer Schnappschalter - Google Patents

Elektrischer Schnappschalter Download PDF

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Publication number
EP0355634B1
EP0355634B1 EP89114946A EP89114946A EP0355634B1 EP 0355634 B1 EP0355634 B1 EP 0355634B1 EP 89114946 A EP89114946 A EP 89114946A EP 89114946 A EP89114946 A EP 89114946A EP 0355634 B1 EP0355634 B1 EP 0355634B1
Authority
EP
European Patent Office
Prior art keywords
cover
cap
plunger
base
edge
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 - Lifetime
Application number
EP89114946A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0355634A1 (de
Inventor
Siegfried Dipl.-Ing. Bär
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.)
Bar Elektrowerke & Co KG GmbH
Bar Elektrowerke GmbH and Co KG
Original Assignee
Bar Elektrowerke & Co KG GmbH
Bar Elektrowerke GmbH and Co KG
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 Bar Elektrowerke & Co KG GmbH, Bar Elektrowerke GmbH and Co KG filed Critical Bar Elektrowerke & Co KG GmbH
Publication of EP0355634A1 publication Critical patent/EP0355634A1/de
Application granted granted Critical
Publication of EP0355634B1 publication Critical patent/EP0355634B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H13/063—Casings hermetically closed by a diaphragm through which passes an actuating member

Definitions

  • the invention relates to a switch of the type specified in the preamble of claim 1.
  • the flexible cap which surrounds the actuating plunger, was held by a flange ring in an enclosing sleeve of the hood wall.
  • the flange ring reached into the inside of the sleeve with a piece of pipe and gripped the cap seam coming into contact there, while its flange piece was supported on the end face of the sleeve.
  • This cap attachment was a weak point in the seal of this known switch; Moisture could penetrate the inside of the switch in the area of the cap. This was particularly noticeable when the switch was used for a long time, which can be attributed to material fatigue.
  • the invention has for its object to develop an inexpensive switch of the type mentioned in the preamble of claim 1, which, even over a longer period of use, characterized by integrity tightness and yet can be installed quickly and precisely. This is achieved according to the invention by the measures specified in the characterizing part of claim 1, which have the following special meaning:
  • the resilient cone ring is initially a very simple and inexpensive to manufacture fastening part. Due to the spring properties of its material, any tolerance deviations in the dimensioning of the interacting components can be easily compensated for with certainty.
  • the assembly process is very simple, since it only requires an axial application of pressure in order to transfer it from its originally turned-out position to an inward-turned position. This indentation position is permanently secured by the spring properties of the cone ring, because after assembly it tries to change its conicity into an increasing indentation position. As a result, a constant axial force acting in the sealing direction is exerted against the cap hem. This pressure on the cap and thus the permanent tightness continues to be effective even if the cap material should shrink after a long period of use.
  • the switch 10 consists of a two-part housing, namely a hood 11 and a base 14 which can be inserted through the hood opening 12 in the direction of the arrow 13.
  • the base 14 is a support for all electrical components, while the hood 11 has a plunger on its upper hood wall 15 16 is provided, which serves to actuate the switch 10.
  • the plunger 16 is preceded by a swivel arm 17, the free, here bent end of which serves as a handle 18.
  • bearing lugs 19 are provided, which are pivotally mounted on pins 20 on the side walls of the hood 11.
  • the plunger 16 is subject to an axial spring force which tends to keep it pushed out of the housing in the direction of arrow 21 'of FIG. 1. By pivoting the arm 17, however, the plunger executes an insertion movement in the direction of the actuating arrow 21.
  • the plunger 16 has a forked foot 22, the two fork parts are axially guided between two vertical inner ribs 23 on the wall of the hood 11.
  • the plunger 16 has a cylindrical cross section.
  • the plunger 16 passes through a bore 24 in the upper hood wall 15.
  • a cap 25 made of elastomeric material, such as rubber, which is dome-shaped has a central hole in the dome apex, which engages sealingly in a circumferential groove 26 in the plunger 16.
  • the cap has a bead with a wedge-shaped profile on its hem. This wedge profile 27 tapers in the insertion direction 21 of the plunger 16 and engages in a correspondingly complementarily profiled annular groove 28 of the hood bore 24 in the installation case.
  • a special foldable conical ring 30 made of metallic, resilient material serves the following special shape and mode of operation.
  • the conical ring 30 consists of a spring washer, preferably made of steel or a non-corrosion-resistant material, and is initially located in the protuberance position 30 ', indicated by dash-dotted lines in FIG. 4. This is characterized in that the ring opening of the conical ring 30 bounded by the inner edge 67 points in the direction of the extension movement 21 '.
  • the conical ring is inserted into a cup-shaped projection 31 on the hood top wall 15 and comes with its peripheral edge 68, above the cap seam 27 to a fixed bearing for support, which in the present case consists of an inner groove 29 in the cup formation 31 .
  • the plunger 16 is brought into the position of FIG.
  • the conicity of the ring is in a counter position, where the inner edge 67 of the ring opening now points in the direction of the insertion movement 21 of the plunger 16, ie in the direction of the hood 11.
  • the peripheral edge 68 of the ring body 30 assembled in this way claws in the inner groove 29 of its own accord. Because of the counter-taper, the bead 27 in the cap seam is now pressed into the receiving groove 28 and is under a permanent axial residual force which ensures permanent tightness at this point .
  • the cone ring 30 holds in its without additional measures being required Indentation position itself. Any tolerances of the interacting components are automatically compensated for by the resilient spring force of the conical ring 30 acting in the insertion direction 21.
  • All other components are integrated in the base 14. These initially include various contact tongues 40, 41, which are designed as strip-shaped, differently cranked stamping sections, the basic structure of which can be explained with reference to the normally closed contact tongue 40.
  • the contact tongue 40 comprises an upper piece 43, which is provided with one or more angled fixed contacts 44 according to the dimensions and required switching positions and has a widening.
  • This upper piece 43 is followed by a middle piece 45, the special feature of which is that the two longitudinal edges lying opposite one another are provided with two edge cutouts, each of which has two mutually opposing shoulders 46, 47, one of which, according to FIG Stop acting base 50 of an incision 51 is supported on the top of the base 14.
  • the middle piece 45 passes through a specially profiled opening 53, which initially has a transverse slot 54, but then also merges into a cylindrical extension 55 against the underside 56 of the base 14. In this area there is the cylindrical extension 55 next to the slot 54 and thus forms the double keyhole profile shown in FIG. 5.
  • the contact tongue 40 includes a lower shoulder, not shown, to which a lower part 33 of the contact tongue 40 is connected, this lower part 33 serving as a flat connecting lug for soldering, gluing or plugging in the conductors of electrical cables 32.
  • the connecting lug 33 initially lies in the same plane as the vertical leg of the L-shaped angled upper part 43 and also the middle part 45 initially remains in this plane.
  • the middle piece 45 is twisted helically by grasping the lower piece 33, as can be seen from FIGS. 1 and 4, the twist 35 being 90 ° in relation to the preassembled position and thus lying in the plane of the drawing, as shown in FIG. 1 is coming.
  • both connecting lugs 33 of the normally closed contact tongue 40 and the bearing contact tongue 41 are in the same plane and thereby, in a left-hand or right-hand arrangement, allow convenient feeding and soldering of the electrical conductors of the two cables 32.
  • the two contact tongues 40, 41 are pushed into the incisions 51 from the upper side 52 until finally the lower shoulder 47 protrudes freely from the lower side 56 of the base. Then the aforementioned swirl 35 is carried out. This shortens the middle piece 45, which is dimensioned such that the lower shoulder 47 is supported on the base underside 56 during the aforementioned 90 ° twist. As a result, the contact tongue is secured in its position.
  • the swirl jams the respective tongues 40 and 41 in the opening and also provides a sealing effect at this point.
  • the seal is further promoted at this point if the flexible flap 36 indicated by dash-dotted lines in FIGS. 1 and 4 is provided, which reaches between the upper shoulder 46 and the base 50 of the aforementioned incision 51. All that is required is to pull this tab 36 over the respective connecting lug 33 before inserting the contact tongue 40 or 41. It is then captively fixed in front of the shoulder 47 and need not be taken into account in the further plug-in assembly.
  • the contact rocker 60 is positioned on a special bearing contact tongue 41, the relevant bearing point being shown in an enlarged manner in FIG. 2.
  • the rocker 60 has a cutting edge 61 which engages in a cutting notch in the associated upper part 43 'of the tongue 41. In this position it is held by a prestressed tension spring 37, one end of which engages at 38 on the contact rocker 60 and the other end 39 is held on the base 14 by means of a cross pin 57.
  • the pin 57 is inserted and held via a labyrinth-like slot 58 of a bearing block 59 formed on the upper side 52 of the base.
  • the tension spring 37 extends in the direction of the swing arm 60, which is why the swing arm 60 is provided with a fork 63 on the bearing side.
  • a fork is also present in the tongue upper part 43 ′ and is also used to carry out the tension spring 37.
  • the middle spring area comes below the forked foot piece 22 of the plunger 16 to lie, this foot piece rider-like encompasses the tension spring 37 and has in the fork base a pressure bead 64 best seen in FIG. 1.
  • the tension spring 37 assumes an inclination course to the rocker 60 and thereby presses a contact 65 located there upward. This indicates the switch's rest position. If the plunger 16 is now inserted axially in the direction of the arrow 21, the tension spring 37 is loaded transversely and kinks at this point. As a result, the section of the tension spring 37 which adjoins the front spring end 38 passes through a central dead center position on the opposite side of the rocker arm 60. As a result, the electrical connection to the fixed contact 44 is released and the rocker arm 60 is moved into the mirror-image position. In this switch position of the switch 10, the normally open contact 66 indicated in FIG. 1 could be contacted, which belongs to a third normally open tongue which is mounted in the base 14 in a manner corresponding to the aforementioned tongues 40, 41. There is only another offset in the upper part of the tongue.
  • a modified bearing contact tongue could also be used, which has a cranked leg profile 69 ', indicated by dash-dotted lines in FIG. 1. This will be used if a normally closed contact tongue 40 is missing and the normally open contact tongue with the aforementioned normally open contact 66 is present. If a normally open contact 66 is not present, a cylindrical cam 70 could be provided in the exemplary embodiment shown in FIG. 1, which serves as the lower stop for the switchover position of the movable contact 65 of the rocker 60. The pivoting movement arrow 83 illustrates the mode of operation of the contact rocker 60.
  • this structural unit is pushed into the hood 11 in the direction of the arrow 13. It is useful to use webs 72 pointing in the direction of insertion, which engage behind complementary, dovetail-shaped undercut guide grooves 73 in the last movement phase.
  • the webs 72 are located on the narrow sides of the rectangular Base 14 and expediently protrude above the base 52 or are integrally formed on the bearing block 59.
  • Parallel edge strips 71 connect the two webs 72 on the upper side 52 of the base.
  • the base 14 is braced in the interior of the hood by the dovetail grip.
  • the base 13 is pressed into the hood 11 by a defined amount in the insertion direction 13.
  • the above-mentioned bracing of the base secures the defined mounting depth 75 shown in FIG. 1.
  • Final securing can take place in that the remaining space 74, which remains towards the hood opening 12, is filled with a casting compound 76.
  • the length of the connecting lugs 33 is chosen so that they always come to rest within the residual space 74.

Landscapes

  • Tumbler Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
EP89114946A 1988-08-16 1989-08-12 Elektrischer Schnappschalter Expired - Lifetime EP0355634B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3827638A DE3827638A1 (de) 1988-08-16 1988-08-16 Elektrischer schnappschalter
DE3827638 1988-08-16

Publications (2)

Publication Number Publication Date
EP0355634A1 EP0355634A1 (de) 1990-02-28
EP0355634B1 true EP0355634B1 (de) 1993-12-01

Family

ID=6360873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114946A Expired - Lifetime EP0355634B1 (de) 1988-08-16 1989-08-12 Elektrischer Schnappschalter

Country Status (2)

Country Link
EP (1) EP0355634B1 (enrdf_load_stackoverflow)
DE (2) DE3827638A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4011980A1 (de) * 1990-04-12 1991-10-17 Cherry Mikroschalter Gmbh Steckschalter
DE4039443C1 (enrdf_load_stackoverflow) * 1990-12-11 1992-06-25 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4209088A1 (de) * 1991-03-28 1992-10-01 Hartmann Hans Georg Kg Elektrischer kleinstschalter, und verfahren zu seiner herstellung
DE4202309C2 (de) * 1992-01-28 1996-10-17 Hermann Dipl Ing Buehl Mikroschalter
CA2084119C (en) * 1992-06-18 1995-12-12 David W. Keck Hermetically sealed snap switch arrangement
DE9309528U1 (de) * 1993-06-26 1993-08-26 Bär Elektrowerke GmbH & Co KG, 58579 Schalksmühle Elektrischer Schnappschalter
DE19642403A1 (de) * 1996-10-14 1998-04-16 Cherry Mikroschalter Gmbh In eine Vergußmasse eingebettetes Schaltelement und Verfahren zu seiner Herstellung
JP5497536B2 (ja) * 2010-05-27 2014-05-21 アルプス電気株式会社 電気部品
ES2948770T3 (es) 2018-12-07 2023-09-18 Defond Electech Co Ltd Un interruptor de acción rápida y método de montaje del mismo

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL290259A (enrdf_load_stackoverflow) * 1962-03-15
DE1893980U (de) * 1964-03-25 1964-06-04 Baer Elektrowerke G M B H Elektrische einrichtung, wie schalter od. dgl.
DE1952092U (de) * 1966-04-02 1966-12-22 Standard Elektrik Lorenz Ag Miniatur-stufendrehschalter.
DE7409453U (enrdf_load_stackoverflow) * 1974-03-18 1976-06-16 Rudolf Schadow Gmbh, 1000 Berlin
US3905246A (en) * 1974-06-05 1975-09-16 Illinois Tool Works Construction and method for forming a plunger seal
EP0260659A3 (en) * 1986-09-16 1988-07-20 OMRON Corporation Micro switch

Also Published As

Publication number Publication date
DE3827638A1 (de) 1990-03-08
EP0355634A1 (de) 1990-02-28
DE3827638C2 (enrdf_load_stackoverflow) 1992-08-20
DE58906294D1 (de) 1994-01-13

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