EP0658274B1 - Elektrischer miniaturschalter - Google Patents
Elektrischer miniaturschalter Download PDFInfo
- Publication number
- EP0658274B1 EP0658274B1 EP93919211A EP93919211A EP0658274B1 EP 0658274 B1 EP0658274 B1 EP 0658274B1 EP 93919211 A EP93919211 A EP 93919211A EP 93919211 A EP93919211 A EP 93919211A EP 0658274 B1 EP0658274 B1 EP 0658274B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact spring
- contact
- switching
- switch
- switching contour
- 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
Links
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/62—Contacts actuated by radial cams
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
- H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
Definitions
- the invention is based on a miniature electrical switch with the features specified in the preamble of claim 1.
- Such miniature switches are called position switches used, e.g. B. the end position of an inserted Audio or video cassette in the drive of an audio or Signal VCRs electrically.
- the miniature switches usually consist of a plastic housing, in which two opposite contact springs are arranged by placing them near their connection ends at a certain distance from each other in a wall of the housing are embedded or clamped.
- One of the contact springs is at its opposite end with your contact Resilient side on a housing-fixed stop.
- the back of the contact spring opposite it rests, however, resiliently on a gear lever, which is one in Housing bearing axis is pivotable.
- the gear lever has a rest position; he is deflected from the rest position, he presses the contact spring against him against the opposite one Contact spring and thereby closes the miniature switch.
- the lever is released again, press the contact spring by its spring force into its rest position back and thereby opens the miniature switch.
- Such miniature switches have a high spatial resolution requires, i.e. the location of a video cassette or one other subject, in which this on the gear lever acts and closes the miniature switch, should be repeatable with high accuracy. How well that works depends on how exactly within a switch series the distance between the two contact springs and the Switching path in view of unavoidable manufacturing tolerances can be kept repeatably the same. Stand there not all technically possible ways to minimize Manufacturing tolerances available because at the same time there is a requirement that the miniature switches as Mass products have to be extremely inexpensive.
- the housing and the shift lever are therefore common made of plastic by injection molding.
- a switch that except for the use of a shift drum a shift lever all in the preamble of the claim 1 has specified features is in DE-B-1153435 disclosed.
- the present invention has for its object a Way to reduce the switching tolerance of such miniature switches to show.
- this is the rest position of the second contact spring determining stop is no longer fixed in the housing, but formed on the pivotally mounted shift lever.
- the inventive method Miniature switches therefore not only the first contact spring, but also also the second contact spring on the gear lever.
- switching contours For the tolerance of the mutual distance the contact springs and their switching path add up in the miniature switch according to the invention no longer one Large number of individual tolerances, rather it only comes up the tolerance in the shape and position of the two switching contours relative to each other. Since both on one and the same Component are formed, namely on the shift lever, it only depends on the manufacturing accuracy for this a component.
- the pivot axis of the shift lever can be different Direction oriented in relation to the contact springs will.
- the pivot axis preferably runs perpendicular to the length and direction of movement the contact springs; that has the advantage that the switching contours symmetrical to the longitudinal center line of the Contact springs can act on them, so that no Tipping moment around the longitudinal center line of the respective contact spring is produced.
- two developments of the invention particularly suitable in one embodiment has one of the contact springs, namely that of the swivel axis a cutout closest to the gear lever, through which the protruding switching contour for the reaches through another contact spring.
- the second embodiment is one of the contact springs, as well the one closest to the pivot axis of the shift lever, narrower than at least part of its length the other contact spring and the switching contour for the wider contact spring engages the narrow one on both sides Contact spring over so that the narrower contact spring in a recess of the switching contour for the wider one Contact spring is located, the bottom of the recess Switching contour for the narrower contact spring forms which even gets a lateral guidance.
- both contact springs on and the same gearshift lever do not have to be both Contact springs are moved when the miniature switch is closed or opened. Rather, it is enough one of the contact springs (here as the first contact spring designated) by one of the switching contours (here as the designated first switching contour) by pivoting the Deflect shift lever, the angle by which the lever must be pivoted to open the switch to close depends on the contact distance from which Shape of the first switching contour and its distance from the pivot axis of the shift lever.
- the second Switching contour which engages the second contact spring, has a course in the form of an arc of a circle, its center on the pivot axis of the shift lever is then the second contact spring when pivoting the shift lever is not deflected as long as it is not with the first contact spring makes contact and through their Movement is lifted from the gear lever.
- a particular advantage of the miniature switch according to the invention is that it is different from the known ones Miniature switch without problems not only as a closer, but also can also be designed as an opener.
- the one switching contour runs in a circular arc with the center on the Swivel axis of the shift lever, and its other shift contour has a shape deviating from the shape of a circular arc
- the simplest way to form a closer is by that you have the arcuate contour for that of the swivel axis of the shift lever further away contact spring and the contact spring closest to the swivel axis the other switching contour creates; realized in reverse
- the easiest way to open an opener is to use the circular arc Switching contour for the one closest to the swivel axis Provides contact spring and the other contact spring creates the non-circular switching contour.
- a particular advantage of the invention is that several of the switches according to the invention in a row arrangement can summarize the en bloc the positions query and signal different elements. This for each miniature switch in the series arrangement with one to realize switching tolerance as low as for a single miniature switch was with the one by injection molding manufactured miniature switches according to the state of the Technology not possible, but results from one Miniature switches according to the invention formed row arrangement without further ado, since the housing tolerances which add up in the row arrangement for the switching accuracy a row arrangement according to the invention are irrelevant because the switching accuracy in everyone Switch element of the series arrangement essentially only determined by the accuracy of the individual shift lever is.
- the miniature switch shown in Figure 1 of known construction has a multi-part cuboid housing 1 made of plastic.
- two contact springs 2 and 3 are injected, which run parallel to each other and each carry a contact piece 4 or 5, which is formed from wire sections, welded onto the contact springs 2 and 3 and arranged crosswise opposite one another.
- an axis 6 extends transversely to the longitudinal extent and direction of movement of the contact springs 2 and 3.
- the axis 6 is rotatably mounted in the two side walls and carries a shift lever 7, one of which End protrudes outwards from an opening 18 in the housing.
- the opposite end of the lever 7 is the first contact spring 2 resiliently with its back.
- This end of the lever 7 located in the housing 1 has a saddle-shaped switching contour 8.
- Two saddles 9 and 10 are formed by the saddle shape, both of which abut the back of the first contact spring 2 when the switch is open. If no other forces act on the lever 7, the first contact spring 2 presses the shift lever 7 into the position shown in FIG.
- the front of the second contact spring 3 rests resiliently against a stop 11 fixed to the housing.
- the shift lever 7 is deflected in the direction of arrow 11 because, for. B.
- the counterclockwise pivoting hump 9 presses the first contact spring 2 against the second contact spring 3 while simultaneously lifting the hump 10 from the contact spring 2 until the contact piece 4 on the contact piece 5 strikes, thereby closes the switch and lifts the second contact spring 3 from the stop 11 in the event of a further pivoting movement of the switching lever 7.
- the closing force of the miniature switch is determined by the spring force of the second contact spring 3.
- the switching accuracy of the miniature switch which can be read from the tolerance of the pivoting angle, by which the switching lever 7 has to be pivoted until the switch is closed, depends on several dimensional tolerances, the dimensional accuracy of the stop 11, and the tolerance of its position in the housing , the dimensional accuracy of the axis 6 and its position in the housing, the dimensional accuracy of the shift lever 7, in particular the tolerance of its two lever arms l 1 and l 2 , and finally also the distance between the contact pieces 4 and 5.
- the second contact spring 3 is not at a stop fixed to the housing 11, but on a further switching contour 13 of the Shift lever 7.
- the first contact spring for this purpose on one part its length is a rectangular recess 14 through which the second switching contour 13, which is on both sides of the first Switching contour 8 is flanked and projects over it, reaches through, so that the second contact spring 3 with their Front resiliently abuts the second switching contour 13.
- the first switching contour 8 lies on both sides with its two the second switching contour 13 arranged sections the back of the first contact spring (see Figure 3).
- the second switching contour 13 in the form of a section a cylindrical surface whose axis is aligned with the swivel axis 6 coincides. If the shift lever 7 is based on the shown in Figure 2, in which the switch is open, swiveled, then the second contact spring changes 3 due to the selected switching contour 13 their position initially not, but the first contact spring 2, which is moved against the second contact spring 3 until it Make contact. The lever arm protruding from the housing released again, the shift lever 7 by the Contact spring 2 returned to that shown in Figure 2 stable rest position.
- the embodiment shown in Figures 4 and 5 differs from that shown in Figures 2 and 3 Embodiment in that the first contact spring 2 and the shift lever 7 are designed differently.
- the first contact spring 2 is narrower than the second contact spring 3 and is located in a recess 15 of the Shift lever 7, the bottom of which forms the first shift contour 8, which, like in FIG. 2, have a saddle shape could, in the specific case, however, be a bit flat is formed and then at the two ends of the plane Section merges into an arcuate course, there, where in the example according to FIG. 2 the cusps 9 and 10 were located to have. Even with such a level education receives a stable rest position with the miniature switch open.
- the two flanking the cutout 15 of the shift lever 7 Projections 16 and 17 carry the second switching contour 13, on which the wider, second contact spring 3 rests.
- the second switching contour 13 is as in the example according to FIG. 2 formed by a section of a cylinder jacket, the Axis coincides with the pivot axis 6.
- the sequence of movements the switch according to FIGS. 4 and 5 is the same as in the case of FIGS. 2 and 3.
- the switching accuracy of switches according to the invention depends on essential only from the dimensional accuracy of the shift lever 7 from the reproducibility of the shape and the mutual distance between the two switching contours 8 and 13.
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Description
- Figur 1
- zeigt zum Vergleich mit der Erfindung einen bekannten Miniaturschalter in einem Längsschnitt,
- Figur 2
- zeigt einen erfindungsgemässen Miniaturschalter im Längsschnitt,
- Figur 3
- zeigt denselben Miniaturschalter im Querschnitt längs der Schnittlinie III-III,
- Figur 4
- zeigt ein anderes Ausführungsbeispiel eines erfindungsgemässen Miniaturschalters im Längsschnitt, und
- Figur 5
- zeigt den Miniaturschalter aus Figur 4 im Querschnitt längs der Schnittlinie V-V.
Claims (5)
- Elektrischer Miniaturschalter mit zwei in einem Gehäuse (1) aus Kunststoff angeordneten, miteinander in Kontakt bringbaren Kontakffedern (2, 3),dadurch gekennzeichnet, daß der Anschlag als zweite Schaltkontur des Schalthebels (7) an einem weiteren Oberflächenbereich (13) ausgebildet ist und daß entweder eine (2) der Kontakffedern (2, 3) einen Ausschnitt (14) hat, durch welchen die Schaltkontur (13) für die andere Kontaktfeder (3) hindurchgreift oder eine (2) der Kontaktfedern (2, 3) wenigstens auf einem Teil ihrer Länge schmaler ist als die andere Kontaktfeder (3) und die Schaltkontur (13) für die breitere Kontakffeder (3) beidseits an der schmalen Kontakffeder (2) vorbeigreift.mit einem schwenkbar im Gehäuse (1) gelagerten Schalthebel (7) mit einem eine erste Schaltkontur bildenden Oberflächenbereich (8), an welchem die erste Kontaktfeder (2) federnd anliegt,und mit einem Anschlag, an welchem die zweite Kontakffeder (3) mit ihrer kontaktgebenden Seite federnd anliegt,
- Miniaturschalter nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Schaltkontur (13) im Gegensatz zur ersten Schaltkontur (8) ein Kreisringabschnitt ist, der koaxial zur Schwenkachse (6) des Schalthebels (7) angeordnet ist.
- Miniaturschalter nach Anspruch 1, dadurch gekennzeichnet, daß die Gestalt der Schaltkonturen (8, 13) so aufeinander abgestimmt ist, daß sich die Kontaktfedern (2, 3) beim Schwenken des Schalthebels (7) gegenläufig bewegen.
- Miniaturschalter nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die erste Schaltkontur (8) eine stabile Ruhelage ist, in welcher die erste Kontakffeder (2) ihr längs zweier Linien oder flächig anliegt.
- Anordnung mehrerer Miniaturschalter nach einem der vorstehenden Ansprüche in Reihe mit der Maßgabe, dass mehrere Gruppen von Kontaktfederpaaren und Schalthebeln in Reihe in einem gemeinsamen Gehäuse angeordnet oder mehrere Gehäuse samt darin befindlichen Kontaktfederpaaren und Schalthebeln in Reihe miteinander verbunden sind.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4228751 | 1992-09-01 | ||
| DE19924228751 DE4228751C1 (de) | 1992-09-01 | 1992-09-01 | Elektrischer Miniaturschalter |
| PCT/EP1993/002332 WO1994006140A1 (de) | 1992-09-01 | 1993-08-28 | Elektrischer miniaturschalter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0658274A1 EP0658274A1 (de) | 1995-06-21 |
| EP0658274B1 true EP0658274B1 (de) | 1998-01-07 |
Family
ID=6466700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93919211A Expired - Lifetime EP0658274B1 (de) | 1992-09-01 | 1993-08-28 | Elektrischer miniaturschalter |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0658274B1 (de) |
| JP (1) | JPH08505977A (de) |
| DE (2) | DE4228751C1 (de) |
| WO (1) | WO1994006140A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11359769B2 (en) | 2018-01-02 | 2022-06-14 | Breakeats Llc | Gas cartridge loaded dispensing device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE513977A (de) * | 1951-09-11 | |||
| DE1153435B (de) * | 1960-08-25 | 1963-08-29 | Franz Neumann | Elektrischer Kipphebelschalter |
| GB1126414A (en) * | 1966-03-10 | 1968-09-05 | Horstmann Gear Co Ltd | Improvements in or relating to electric circuit controllers incorporating time-switches |
| US3479478A (en) * | 1967-08-09 | 1969-11-18 | Gen Motors Corp | Cantilevered contact blade and return spring with reversely bent portion |
| USRE29158E (en) * | 1971-11-01 | 1977-03-22 | The Singer Company | Timer blade arrangement |
| US3971904A (en) * | 1973-10-23 | 1976-07-27 | Illinois Tool Works Inc. | Switch assembly for gas tap assembly having cam operated leaf spring contacts and split housing cam detent stop |
| US4130744A (en) * | 1977-04-25 | 1978-12-19 | Bell Telephone Laboratories, Incorporated | Cam actuated multiple contact spring switch |
| US4389549A (en) * | 1981-11-23 | 1983-06-21 | Cts Corporation | Side actuated miniature dip switch |
| US4506122A (en) * | 1982-05-22 | 1985-03-19 | Mitsuku Denshi Kogyo Kabushiki Kaisha | Selection switch |
-
1992
- 1992-09-01 DE DE19924228751 patent/DE4228751C1/de not_active Expired - Fee Related
-
1993
- 1993-08-28 WO PCT/EP1993/002332 patent/WO1994006140A1/de not_active Ceased
- 1993-08-28 DE DE59307952T patent/DE59307952D1/de not_active Expired - Fee Related
- 1993-08-28 JP JP6506854A patent/JPH08505977A/ja active Pending
- 1993-08-28 EP EP93919211A patent/EP0658274B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59307952D1 (de) | 1998-02-12 |
| EP0658274A1 (de) | 1995-06-21 |
| DE4228751C1 (de) | 1994-01-27 |
| WO1994006140A1 (de) | 1994-03-17 |
| JPH08505977A (ja) | 1996-06-25 |
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