EP0658274A1 - Elektrischer miniaturschalter - Google Patents
Elektrischer miniaturschalterInfo
- Publication number
- EP0658274A1 EP0658274A1 EP93919211A EP93919211A EP0658274A1 EP 0658274 A1 EP0658274 A1 EP 0658274A1 EP 93919211 A EP93919211 A EP 93919211A EP 93919211 A EP93919211 A EP 93919211A EP 0658274 A1 EP0658274 A1 EP 0658274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- contact spring
- contact
- lever
- 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.)
- Granted
Links
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 an electrical miniature switch with the features specified in the preamble of claim 1.
- Such miniature switches are used as position switches, for. B. to signal the end position of an inserted audio or video cassette in the drive of an audio or video recorder electrically.
- the miniature switches usually consist of a plastic housing in which two opposing contact springs are arranged by placing them in the vicinity of their connection ends at a certain distance from one another in a wall of the housing are embedded or clamped.
- One of the contact springs rests at its opposite end with its contacting side resiliently against a stop fixed to the housing.
- the back of the contact spring opposite it rests resiliently on a shift lever which can be pivoted about an axis mounted in the housing.
- the shift lever is in a rest position; If it is deflected from the rest position, it presses the contact spring against it against the opposite contact spring and thereby closes the miniature switch. If the lever is released again, the contact spring presses it back into its rest position by its spring force and thereby opens the miniature switch.
- Such miniature switches are required to have a high spatial resolution, i.e. the position of a video cassette or other object in which it acts on the shift lever and closes the miniature switch should be repeatable with high accuracy. How well this works depends on how exactly the distance between the two contact springs and the inside of a switch series
- Switching path can be kept consistently the same in view of unavoidable manufacturing tolerances. Not all technically possible ways to minimize manufacturing tolerances are 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.
- more than five individual tolerances position of the stop for the one contact spring, errors in the dimensional accuracy of the contact springs themselves, position of the pivot axis of the shift lever, errors in the dimensional accuracy of the shift lever) can add up to the tolerance of the switching path.
- the present invention has for its object to show a way to reduce the switching tolerance of such miniature switches.
- the stop determining the rest position of the second contact spring is no longer arranged in a stationary manner in the housing, but rather is formed on the pivotably mounted shift lever.
- the miniature switch according to the invention not only the first contact spring but also the second contact spring rests on the switching lever.
- the two surface areas of the switching lever, on which the two contact springs bear, are hereinafter referred to as "switching contours".
- switching contours The two surface areas of the switching lever, on which the two contact springs bear, are hereinafter referred to as "switching contours".
- the tolerance of the mutual spacing of the contact springs and their switching path no longer add up to a large number of individual tolerances, rather it only arises the tolerance in the shape and position of the two switching contours relative to one another.
- the specified contact distance is 0.15 mm, which could be maintained with an accuracy of _ + 0.07 mm.
- a tolerance of + 0.04 mm could be maintained, the switching accuracy thus being almost doubled.
- the pivot axis of the switching lever can be oriented in different directions with respect to the contact springs become.
- the pivot axis preferably runs at right angles to the longitudinal extent and to the direction of movement of the contact springs; This has the advantage that the switching contours can act on the contact springs symmetrically to the longitudinal center line, so that no tilting moment is generated around the longitudinal center line of the respective contact spring.
- two further developments of the invention are particularly suitable: in one embodiment, one of the contact springs, namely the one closest to the pivot axis of the switching lever, has a cutout, through which the protruding switching contour for the other contact spring extends.
- one of the contact springs namely that closest to the pivot axis of the switching lever, is narrower than the other contact spring at least over part of its length, and the switching contour for the wider contact spring reaches past the narrow contact spring on both sides , so that the narrower contact spring lies in a recess of the switching contour for the wider contact spring, the bottom of the recess forming the switching contour for the narrower contact spring, which thereby even receives lateral guidance.
- both contact springs are in contact with one and the same switching lever according to the invention, both contact springs do not have to be moved when the miniature switch is closed or opened. Rather, it is enough to deflect one of the contact springs (here referred to as the first contact spring) through one of the switching contours (here referred to as the first switching contour) by pivoting the switching lever, the angle by which the lever has to be pivoted in order to close the open switch, depends on the contact distance, on the shape of the first switching contour and its distance from the pivot axis of the switching lever.
- the second switching contour which engages the second contact spring, has a shape in the form of a circular arc, the center of which lies on the pivot axis of the switching lever, then the second contact spring is not deflected when the switching lever is pivoted, as long as it is not with the first contact spring Makes contact and is lifted from the shift lever by their movement.
- the switching contour for the second contact spring is also entirely possible to design the switching contour for the second contact spring differently, in particular to shorten the switching process: this is achieved by designing the second switching contour in such a way that the two contact springs move in opposite directions when the switching lever is pivoted, when closing the miniature switch towards each other and when opening the miniature switch away from each other. In this way, the swivel angle required for closing can be reduced for a given contact distance in the open switch, or the contact angle can be reduced for a given swivel angle. distance in the open switch is increased, thereby increasing the dielectric strength. As in the prior art, the switch can be reset by the self-resilience of the contact springs.
- a particular advantage of the miniature switch according to the invention is that, unlike the known miniature switches, it can easily be designed not only as a make contact but also as a break contact. If, for example, you have a miniature switch, one switching contour of which is in the form of an arc of a circle with the center on the pivot axis of the shift lever, and the other switching contour of which is of a shape which deviates from the shape of an arc of a circle, the simplest way to form a make contact is to form the arc of a circle Provides a contour for the contact spring which is further away from the pivot axis of the switching lever and which creates the contact spring closest to the pivot axis of the other switching contour; Conversely, the simplest way to implement an opener is to provide the circular arc-shaped switching contour for the contact spring closest to the pivot axis and to apply the other contact spring to the non-circular arc-shaped switching contour.
- a particular advantage of the invention lies in the fact that several of the switches according to the invention can be combined to form a row arrangement, which interrogate and signal the positions of different elements en bloc. This It was not possible to implement a switching tolerance for each miniature switch of the series arrangement with a switching tolerance that was as low as for a single miniature switch, using the miniature switch produced by injection molding according to the prior art, but is readily obtained with a series arrangement formed from miniature switches according to the invention, since the housing tolerances, which add up in the series arrangement, are irrelevant for the switching accuracy of a series arrangement according to the invention, because the switching accuracy in each
- Switch element of the series arrangement is essentially determined only by the accuracy of the individual shift lever.
- FIG. 1 shows a known miniature switch in a longitudinal section for comparison with the invention
- FIG. 2 shows a miniature switch according to the invention in longitudinal section
- FIG. 3 shows the same miniature switch in cross section along the section line III-III
- Figure 4 shows another embodiment of a miniature switch according to the invention in longitudinal section
- FIG. 5 shows the miniature switch from FIG. 4 in cross section along the section line V-V.
- the miniature switch shown in Figure 1 of known construction has a multi-part guaderiform housing 1 made of plastic.
- There are two contact springs in one of the housing walls. 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 first contact spring 2 resiliently rests with its rear side. This end lying in the housing 1
- the lever 7 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.
- the closing force of the miniature switch is determined by the spring force of the second contact spring 3. If the switching lever 7 is pivoted against the arrow 12 when the switch is open, then the contact spring 2 is deflected by the hump 10 while simultaneously lifting the hump 9 the lever arm protruding from the housing 1 is released again, then the contact spring 2 exerts a restoring moment on the switching lever 7 so that it returns to its rest position shown in FIG.
- 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, on the dimensional accuracy of the stop 11, and on 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 1 and 1_, and finally also the distance between the contact pieces 4 and 5.
- the second contact spring 3 does not rest against a stop 11 fixed to the housing, but against a further switching contour 13 of the switching lever 7.
- the first contact spring has a rectangular part of its length for this purpose Recess 14, through which the second switching contour 13, which is flanked on both sides by the first switching contour 8 and projects over it, passes through, so that the front side of the second contact spring 3 rests resiliently on the second switching contour 13.
- the first switching contour 8 lies with its two sections arranged on both sides of the second switching contour 13 on the back of the first contact spring (see FIG. 3).
- the first switching contour 8 is designed as a saddle, as in FIG. 1, the second switching contour 13 in the form of a section of a cylindrical surface, the axis of which is aligned with the pivot axis 6 coincides. If the switching lever 7 is pivoted starting from the rest position shown in FIG. 2, in which the switch is open, then the second contact spring 3 does not initially change its position as a result of the selected switching contour 13, but the first contact spring 2 does is moved against the second contact spring 3 until they make contact. If the lever arm protruding from the housing is released again, the switching lever 7 is reset by the contact spring 2 into the stable rest position shown in FIG.
- the exemplary embodiment shown in FIGS. 4 and 5 differs from the exemplary embodiment illustrated in FIGS. 2 and 3 in that the first contact spring 2 and the switching lever 7 are designed differently.
- the first contact spring 2 is narrower than the second contact spring 3 and lies in a recess 15 of the switching lever 7, the bottom of which forms the first switching contour 8, which, like in FIG. 2, could be saddle-shaped, but in some cases a little in the specific case is flat and then merges at the two ends of the flat section into an arcuate course, where in the example according to FIG. 2 the cusps 9 and 10 were located. Even with such a flat design, a stable rest position is obtained when the miniature switch is open.
- the two projections 16 and 17 flanking the cutout 15 of the switching lever 7 carry the second switching contour 13, against which the wider, second contact spring 3 bears.
- the second switching contour 13, as in the example according to FIG. 2, is formed by a section of a cylinder jacket, the axis of which coincides with the pivot axis 6.
- the sequence of movements in the switch according to FIGS. 4 and 5 is the same as that in FIGS. 2 and 3.
- the first contact spring rests on a switching contour which is formed by a section of a cylinder jacket whose axis coincides with the pivot axis 6, whereas the second contact spring 3, which is further away from the pivot axis 6, bears against a switching contour which is saddle-shaped or partially flat as in FIG. 4, then the first contact spring 2 will retain its position when the switching lever 7 is pivoted , but the second contact spring 3 deflected and removed from it, so that an opener can be realized in this way instead of a closer.
- the switching accuracy of switches according to the invention essentially depends only on the dimensional accuracy of the switching lever 7, specifically on 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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924228751 DE4228751C1 (de) | 1992-09-01 | 1992-09-01 | Elektrischer Miniaturschalter |
DE4228751 | 1992-09-01 | ||
PCT/EP1993/002332 WO1994006140A1 (de) | 1992-09-01 | 1993-08-28 | Elektrischer miniaturschalter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0658274A1 true EP0658274A1 (de) | 1995-06-21 |
EP0658274B1 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 |
---|---|---|---|---|
NL81177C (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 EP EP93919211A patent/EP0658274B1/de not_active Expired - Lifetime
- 1993-08-28 DE DE59307952T patent/DE59307952D1/de not_active Expired - Fee Related
- 1993-08-28 WO PCT/EP1993/002332 patent/WO1994006140A1/de active IP Right Grant
- 1993-08-28 JP JP6506854A patent/JPH08505977A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9406140A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4228751C1 (de) | 1994-01-27 |
JPH08505977A (ja) | 1996-06-25 |
EP0658274B1 (de) | 1998-01-07 |
DE59307952D1 (de) | 1998-02-12 |
WO1994006140A1 (de) | 1994-03-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1765184C3 (de) | Elektrische Schaltvorrichtung | |
DE2524743A1 (de) | Elektrischer schalter mit verbesserter kontaktkonstruktion | |
DE3830442C2 (de) | Klemmvorrichtung zum schraubenlosen Anschluß mindestens eines elektrischen Leiterdrahts | |
DE1665294A1 (de) | Elektrischer Schalter | |
DE2162460A1 (de) | Elektrischer Schalter | |
DE2128954B2 (de) | Elektrische Steckverbindung | |
DE3724736C2 (de) | Elektrischer Schalter, insbesondere für Kraftfahrzeuge | |
EP0658274A1 (de) | Elektrischer miniaturschalter | |
DE2416969C2 (de) | Druckknopfschalter | |
DE19602036B4 (de) | Schalter mit durch Federzungen gebildeten beweglichen Kontaktstücken | |
EP0743664A2 (de) | Elektrisches Schaltgerät | |
DE3739296A1 (de) | Impulsgenerator | |
DE3806994A1 (de) | Muenzsortierer | |
DE3900394C2 (de) | ||
DE2636164A1 (de) | Allrichtungs-traegheitsschalter | |
DE1515880B1 (de) | Kippschalter unter Verwendung von Schutzrohrkontakten zur Herstellung oder Umsteuerung von Stromkreisverbindungen | |
DE9010565U1 (de) | Steckverbinder | |
EP0068483A1 (de) | Elektromechanische Schalteinrichtung für Fernsprechgeräte | |
DE4427833A1 (de) | Drehschalter | |
DE2554177A1 (de) | Schaltelement | |
DE7541273U (de) | Schalter | |
DE4323878A1 (de) | Tastmodul zum Schalten | |
DE10037142B4 (de) | Elektrisches Schaltelement | |
DE3930821C2 (de) | ||
DE4226106C1 (en) | Programmable calibration line between 2 conductor planes - has gap in inner conductor bridged by 2 alternate 4-pole networks by deflection of free inner conductor ends |
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 |
|
17P | Request for examination filed |
Effective date: 19950303 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB LI |
|
17Q | First examination report despatched |
Effective date: 19950731 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DODUCO GMBH + CO DR. EUGEN DUERRWAECHTER I.K. |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB LI |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 59307952 Country of ref document: DE Date of ref document: 19980212 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19980408 |
|
ET | Fr: translation filed | ||
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: DODUCO GMBH |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19980818 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19980825 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980831 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980831 |
|
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 | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19990828 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19990828 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000428 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020712 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040302 |