EP0410282A2 - Commutateur - Google Patents

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Publication number
EP0410282A2
EP0410282A2 EP90113723A EP90113723A EP0410282A2 EP 0410282 A2 EP0410282 A2 EP 0410282A2 EP 90113723 A EP90113723 A EP 90113723A EP 90113723 A EP90113723 A EP 90113723A EP 0410282 A2 EP0410282 A2 EP 0410282A2
Authority
EP
European Patent Office
Prior art keywords
switch
lever
housing
spring
snap 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.)
Withdrawn
Application number
EP90113723A
Other languages
German (de)
English (en)
Other versions
EP0410282A3 (en
Inventor
Othmar Zemp
Albrecht Meier
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.)
Elektro-Apparatebau Olten AG
Original Assignee
Elektro-Apparatebau Olten 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 Elektro-Apparatebau Olten AG filed Critical Elektro-Apparatebau Olten AG
Publication of EP0410282A2 publication Critical patent/EP0410282A2/fr
Publication of EP0410282A3 publication Critical patent/EP0410282A3/de
Withdrawn legal-status Critical Current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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • 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
    • H01H13/023—Light-emitting indicators
    • 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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs

Definitions

  • the present invention relates to a switch according to the preamble of claim 1.
  • a switch of this type is described for example in CH-PS 650 618.
  • the snap spring bearing is attached to an angle lever which is pivotally mounted with the end of one of its two arms in the immediate vicinity of the housing wall and which projects diametrically through the housing to the opposite housing wall with its other arm.
  • the pivot axis of the contact spring lies between the articulation point for the angle lever and the longitudinal axis of the housing.
  • the actuating member acts via a compensating spring that reduces the switching path. By depressing the actuator, the compensating spring is compressed and moves the angle lever against a return spring.
  • the present invention has as its object to improve a switch of this type so that it can be made much smaller in length and width with the smallest switching path tolerances for the actuator.
  • the invention has the advantage that the bearing block can be firmly connected to a base which closes the switch housing at the rear and carries the work and lighting contacts, so that the movable switch parts can be mounted outside the housing in a simple and easily accessible manner during switch assembly, which speeds up assembly and facilitates automation.
  • the embodiment according to claim 2 has the advantage that for each switching operation, that is, both when switching on and when switching off, the same dead center is given, which reduces the displacement of the snap spring bearing and enables a small switch diameter. Furthermore, a particularly short length of the switch is achieved.
  • the pivot bearing for the lever can be designed as a solid axle bolt passing through the bearing block, which is practically not subject to wear and tear and thus enables play-free operation throughout the entire service life of the switch.
  • the switching path of the actuating member extends in the longitudinal direction of the switch housing, whereas the displacement path of the snap spring bearing extends in the transverse direction.
  • the switching path can be reduced in a simple manner into a small displacement path of the snap spring bearing.
  • the embodiment according to claim 6 has the advantage that every movement of the actuating member is converted into a sliding movement of the snap spring bearing practically without play and a high switching precision is achieved.
  • the return spring thus serves not only to return the snap spring bearing but also to return the actuating member.
  • the switch therefore consists of fewer components and can be made more space-saving.
  • the embodiment according to claim 7 brings a further significant ease of assembly.
  • the movable contact parts mounted on the housing base (base) can be checked outside the switch. Then the tubular housing jacket is plugged onto the housing base and fixed with it connected. The pressure hood can then be inserted in a single operation and brought into direct operative connection with the movable contact parts. This applies in particular using the features of claim 8.
  • the switch also has a latching function in addition to the push button function.
  • the storage of the rotating bolt on the bearing block enables the use of a long and large axle journal for the bolt bearing. This measure itself, combined with the associated low wear, guarantees a high level of functional accuracy throughout the life of the switch.
  • the features according to claim 10 enable the aforementioned simple assembly even in the case of switches with a latching function, in that the pressure hood can be inserted into the switch housing from above, regardless of the rotational position of the rotary latch, until the force transmission elements latch with the angle lever because the rotary latch automatically moves into one functional position is forced.
  • the pressure hood with the force transmission members and the link serves as a tool for inserting and removing the light source.
  • the invention also ensures that the mutual position of the rotary bolt and the axle bolt can be maintained with great accuracy, which increases the functional reliability.
  • the switch has a cylindrical housing 1 (FIGS. 1 to 3) which widens at the upper end to form a frame 2 and forms a shoulder 3.
  • a union nut (not shown) can be screwed onto an external thread 4 on the housing 1. This is used to clamp the switch in a front panel during assembly.
  • a base 5 closes off the housing 1, through which two contact arms 6 and 7 are guided.
  • the contact arm 7 is bent in a Z-shape and forms a contact surface 8 in the interior of the housing. Opposite it is a rest stop 9 fixed to the housing.
  • the second, up to the area the longitudinal center of the contact arm 6 is formed at the upper end into an arc 10 to which the correspondingly bent end of a contact spring 11 is connected.
  • the free end of the contact spring can be pivoted between the contact surface 8 and the rest stop. If the free contact spring end lies on the contact surface 8, the switch contact is closed, that is, it connects the two contact arms 6, 7 in an electrically conductive manner. If it lies against the rest stop 9, the switch contact is interrupted.
  • an axle bolt 13 is attached, on which an angle lever 14 is pivotally mounted.
  • the bearing block 12 is held between two cheeks 50, 51 firmly connected to the base 5 by the bolt 13.
  • the first lever arm of the angle lever 14 is formed by two parallel, legs 15, 16 spaced apart from one another, which are pivotably mounted on the axle pin 13 and are fixedly connected to one another by a bridge 17 (FIGS. 1 to 5). They are each provided with a triangular snap spring bearing 19, on which the force of a snap spring 20 acts.
  • the snap spring 20 has a recess 20 'so that it can move past with the upper end portion on both sides of the contact spring 11 when the angle lever 14 is pivoted. From the bridge 17 there is a tongue 18 which forms the second lever arm with the bridge 17. Recesses on the tongue 18 form a web 21 and two tabs 23.
  • a return spring 22 engages the web 21 and the two tabs 23 serve to connect to the pressure hood 24.
  • the two legs 15, 16 are spaced apart from one another to such an extent that when the angle lever 14 is pivoted about the axle pin 13, they can grip past the arc 10 of the contact arm 6 and past the contact spring 11 attached to it. This creates a comparatively large swivel range for the angle lever 14 in a small space. This also gives great freedom of choice for the length of the first lever arm 15, 16.
  • This shape of the angle lever 14 also enables the axle pin 13 to be arranged close to the central axis of the housing 1, which also creates a large freedom of choice for the length of the second lever arm 17, 18, the pivot angle of which is determined by the switching path required by the switch.
  • the axle pin 13 can be dimensioned large without disadvantage, which counteracts wear in the pivot bearing of the angle lever 14.
  • the contact surface 8 and the rest stop 9 limit the swivel angle ⁇ of the contact spring 11.
  • the axle pin 8 is oriented at right angles to the swivel plane of the contact spring 11 (which corresponds to the plane of the drawing in FIGS. 1, 2 and 5) and the bisector 25 of the swivel angle ⁇ intersects it Longitudinal central axis.
  • the snap spring bearings 19 can be moved exactly through the pivoting center of the contact spring 11, which results in the same dead position for switching on and off.
  • the axis pin 13 is offset by the distance "a" from the longitudinal center axis of the housing 1, whereby the second lever arm 17, 18 of the angle lever 14 can be made comparatively long with the small housing diameter as mentioned above.
  • the contact spring 11 has a shoulder 26 on opposite sides, which forms a support for the lower end of the snap spring 20. This is bent to an angle under elastic deformation and clamped with this preload between the two snap spring bearings 19 and the shoulders 26. If the first lever arm 15, 16 is pivoted from the position shown in solid lines in FIG. 4 into the dash-dotted line, the snap spring 20 is stretched elastically up to a dead center T. After it has been exceeded, it exerts an opposing moment on the contact spring 11, whereupon the contact spring 11 - with partial relaxation of the snap spring 20 - snaps against the contact surface 8.
  • the pivot angle of the angle lever 14, which is preferably provided here for opening and closing the switch contact, is 35 °. However, it can also be chosen larger or smaller, depending on the desired switching path S for the pressure hood 24 and the corresponding choice of the effective lever arm lengths R1 or R2 and their relationship to one another.
  • the edge 12 'of the bearing block 12 forms for the second lever arm 17, 18 a mounting stop for hanging the return spring 22nd
  • the legs 15 of the angle lever 14 can be directed away from the axle pin 8 (instead of downwards), the snap spring 20 engaging at its upper end.
  • the snap spring 20 would be a coil spring that is prestressed in tension.
  • the force is introduced from the pressure hood 24 onto the angle lever 14 or its second lever arm 17, 18 by a reflector 27, or two, firmly connected to the pressure hood 24 with legs 28 made in one piece, which are guided downward parallel to the longitudinal axis of the housing. These legs 28 are provided with two oblique expansion flanks 29 at the lower end. Above there are two wedge-shaped recesses 30, into which the tabs 23 engage and with which they form an articulated connection.
  • the smallest distance between the wedge flanks of the bearings 30 corresponds to the thickness of the tabs 23.
  • the wedge angle of the bearings 30 also corresponds to the desired swivel angle of the angle lever 14.
  • the flanks of the bearings 30 thus limit the swivel path of the angle lever 14 as end stops.
  • the lower flanks of the bearings 30 can be chamfered if the assembled pressure hood 24 should also be removable.
  • the reflector 27 is made in one piece with the legs 28 and acts directly on the angle lever 14, the assembly of the switch is comparatively simple.
  • the reflector 27 with the pressure hood 24 firmly attached is introduced into the switch housing 1 from above (see FIGS. 1 and 2).
  • the legs 28 with the spreading flanks 29 slide past the tab 23 and spread apart until they engage with the tab 23. After locking, the reflector 27 and the pressure hood 24 are captively connected to the switch.
  • the journal 32 of a rotary bolt 31 is rotatably mounted in the bearing block 12. This is provided with two cams 33 which, as described later, facilitate the assembly of the switch.
  • the axle journal is designed to be comparatively large in terms of diameter and length, so that the rotary bolt 31 is mounted in the bearing block 12 with as little play and wear as possible and can reliably interact with the link 34.
  • the angle lever 14 is pivoted over the dead position T and the switch contact is closed.
  • the return spring 22 moves the link 34 back to the locking position, in which the rounded corner 38 of the link in the second recess 39 of the rotary latch 31 engages (position S1 shown in broken lines in FIG. 6).
  • the locking position is released by pressing the pressure hood 24 a second time.
  • the link 34 moves downward again, meets the rounded edge 40 of the rotary bolt 31 with the rounded edge 36 and rotates it further until it lies transversely (dot-dash position S2 in Fig. 6) and the backdrop 34 stops.
  • the return spring 22 then pushes the link 34 upward again.
  • the rounded edge 38 continues to turn the rotary latch 31 clockwise until one of its straight sides abuts the surface 41 of the link curve and holds it in this rotational position until the next switching operation.
  • the link 34 has a recess 42 at the open end. This facilitates the assembly process in connection with the cams 33. If the pressure hood 24 and reflector 27 are inserted into the switch housing 1 from above (as shown in FIG. 2), the position of the rotary latch 31 is indefinite. If it lies transversely as shown in FIG. 8, the link 34 meets with its corner 43 on one of the cams 33 and rotates the rotary latch 31 in a clockwise direction. During the further displacement, the rounded rotary bolt flank 40 meets the wedge flank 44 of the link curve and continues to rotate until it lies with its straight flank on the surface 41 of the link curve and is held in this rotational position.
  • the rotational position of the rotary latch 31 is therefore without influence.
  • the rotary latch 31 is automatically brought into the correct starting position.
  • the link 34 is further provided with an upwardly facing recess 45 which is diametrically opposite the space between the legs 28. It is used to mount a light source.
  • An LED 46 as a light source is attached to a holder 47.
  • Your plug contact 48 is guided downward parallel to the longitudinal axis of the switch housing.
  • the holder 47 is pushed with two cam-shaped projections between the legs 28 and into the recess 45.
  • the recess 45 and the mutually facing side surfaces 54 of the legs 28 form a guide which, when the LED 46 is inserted, moves along the cam-like projections on the holder 47.
  • the length of this guide which is at least equal to the switching path S, is limited on the one hand by stop surfaces 55 and on the other hand by cams 56 on the legs 28.
  • the cams 56 are each attached to one of the legs 28 and face one another.
  • the pressure hood 24 and the reflector 27 firmly connected to it form a tool for inserting the LED 46.
  • the pressure hood 24 with the LED 46 inserted in the guide 28, 45, 55, 56 is inserted into the upper end of the housing 1 inserted.
  • the plug contacts 48 are inserted into the housing-side, complementary push-in sleeves 52, 53, which conduct with the rear lamp springs 49 are connected.
  • the LED 46 assumes the position intended for them and the switch is ready for operation.
  • the LED 46 is replaced by pulling the pressure hood 28 out of the housing 1 together with the reflector 27.
  • the cams 56 hook one of the two cam-like projections on the holder 47 and pull the LED 46 out of the plug sleeves 52. If the LED 46 is inserted, the essentially cylindrical reflector 27 surrounds it on all sides. This mutual relationship is also maintained when the pressure hood 24 is depressed by the switching path S and held by the rotary latch 31.
  • the switch is largely assembled on the base 5 and checked for its function. Then the base 5 is inserted into the cylindrical casing of the housing 1 and firmly connected to it. Then the pressure hood 24 with the reflector 25 and optionally with the LED 46 are used.

Landscapes

  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
EP19900113723 1989-07-28 1990-07-18 Switch Withdrawn EP0410282A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2820/89A CH679094A5 (fr) 1989-07-28 1989-07-28
CH2820/89 1989-07-28

Publications (2)

Publication Number Publication Date
EP0410282A2 true EP0410282A2 (fr) 1991-01-30
EP0410282A3 EP0410282A3 (en) 1992-12-16

Family

ID=4242321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900113723 Withdrawn EP0410282A3 (en) 1989-07-28 1990-07-18 Switch

Country Status (4)

Country Link
US (1) US5089678A (fr)
EP (1) EP0410282A3 (fr)
JP (1) JPH0367422A (fr)
CH (1) CH679094A5 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0641038U (ja) * 1992-11-04 1994-05-31 株式会社東京部品製作所 スイッチ
GB9418520D0 (en) * 1994-09-14 1994-11-02 Arcolectric Switches Plc Push button switch
KR100319214B1 (ko) * 1999-07-15 2002-01-05 이철환 스위치
US6437270B1 (en) * 2000-09-14 2002-08-20 Trw Inc. Pushbutton switch
ITTO20030463A1 (it) * 2003-06-18 2004-12-19 Olsa Spa Interruttore per plafoniere.
EP3216472A1 (fr) * 2016-03-11 2017-09-13 Carebay Europe Ltd. Dispositif d'information électrique pour communiquer des informations liées à une administration de médicament

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755353A (en) * 1953-08-07 1956-07-17 Soreng Products Corp Overcenter snap switch
DE1248132B (de) * 1965-12-27 1967-08-24 Walther Bueromasch Gmbh Elektrischer Schnapptaster
CH650618A5 (de) * 1980-07-08 1985-07-31 Olten Ag Elektro Apparatebau Drucktaste mit impuls- oder rastfunktion.
US4447685A (en) * 1982-02-28 1984-05-08 Nihon Kaiheiki Kogyo Kabushiki Kaisha Small-sized push-button switch
EP0160206A3 (fr) * 1984-03-22 1987-07-22 Omron Tateisi Electronics Co. Commutateur à bouton-poussoirs
JPS61135009A (ja) * 1984-12-05 1986-06-23 オムロン株式会社 押しボタンスイツチ

Also Published As

Publication number Publication date
CH679094A5 (fr) 1991-12-13
JPH0367422A (ja) 1991-03-22
EP0410282A3 (en) 1992-12-16
US5089678A (en) 1992-02-18

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