EP0038501B1 - Drucktastenaggregat - Google Patents

Drucktastenaggregat Download PDF

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Publication number
EP0038501B1
EP0038501B1 EP81102802A EP81102802A EP0038501B1 EP 0038501 B1 EP0038501 B1 EP 0038501B1 EP 81102802 A EP81102802 A EP 81102802A EP 81102802 A EP81102802 A EP 81102802A EP 0038501 B1 EP0038501 B1 EP 0038501B1
Authority
EP
European Patent Office
Prior art keywords
push button
latching bar
button unit
unit according
push
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
EP81102802A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0038501A2 (de
EP0038501A3 (en
Inventor
Karl-Heinz Bauer
Gerold Eckert
Reinhold Wolf
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.)
Preh GmbH
Original Assignee
Preh GmbH
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 Preh GmbH filed Critical Preh GmbH
Publication of EP0038501A2 publication Critical patent/EP0038501A2/de
Publication of EP0038501A3 publication Critical patent/EP0038501A3/de
Application granted granted Critical
Publication of EP0038501B1 publication Critical patent/EP0038501B1/de
Expired 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/72—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard wherein the switch has means for limiting the number of operating members that can concurrently be in the actuated position
    • H01H13/74—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard wherein the switch has means for limiting the number of operating members that can concurrently be in the actuated position each contact set returning to its original state only upon actuation of another of the operating members

Definitions

  • the invention is based on a pushbutton unit according to the preamble of claim 1.
  • Such pushbutton assemblies are preferred in various embodiments when tuning and switching on RF receivers, such as. B. radio or television receivers used.
  • the preset tuning voltage and thus the assigned station or channel can be switched on by pressing a single button.
  • the set tuning voltage is stored in channel memories in the form of spindle resistors or rotary resistors connected as voltage dividers.
  • a set of pushbutton switches for operating slide switches is already known (DE-B-1 950 036), which can be mutually triggered by means of a locking rail.
  • the push rods of the slide switches are slidably mounted in a upright wall in a U-shaped metal channel.
  • the profiling of the lugs and the openings is such that a force is exerted on the locking rail in the longitudinal direction of the channel when the key rods are moved.
  • the locking rail itself is biased by a hairpin-shaped return spring.
  • One leg of the return spring lies in incisions in the walls of the channel, while the other leg engages in an opening in the locking rail.
  • a pushbutton unit for television receivers is already known, in which the pushbuttons can be triggered by a spring-loaded locking rail.
  • This locking rail is slidably mounted in a U-shaped metal channel on one of the walls perpendicular to the direction of push buttons.
  • the push buttons are used to switch on the preset tuning voltage for capacitance diodes.
  • the tuning voltage is saved via voltage dividers in the form of spindle resistors.
  • the frequency range can also be selected using the pushbuttons when used in a television receiver. To do this, the pushbutton can be moved to different locking angular positions by turning it. At the same time, an actuator is thereby rotated, which is connected to a displaceable backdrop.
  • this backdrop bears several channel scales assigned to the respective frequency ranges, which are visible in a window of the housing.
  • Each push button is assigned its own backdrop, the backdrops being arranged parallel to one another and guided in the housing with the possibility of mutual overlap.
  • the arrangement is tile-like, i. H. with a slight inclination to the plane of the central axes of the scenes.
  • the fact that each push button has its own backdrop, the push button assembly is very expensive.
  • the object of the present invention is to provide a pushbutton unit of the type mentioned at the outset, which - without having to forego ease of use - consists of fewer individual parts and which is therefore less expensive to produce.
  • the pushbutton unit shown in FIG. 1 has, for example, eight pushbuttons for switching on the tuning voltages preset in the individual channel memories.
  • the channel memories consist of spindle resistances not visible in the figure, in which a spring carrier with a sliding contact is guided along a spindle by turning a push-button.
  • the sliding contact establishes an electrical connection between a collector track or the spindle and a resistance element, which is applied in a multiple arrangement in a known manner on an insulating plate made of hard paper or plastic.
  • This insulating material plate which is identified by 2 in FIG. 1, forms the end of a housing 1 which is open on one side.
  • the housing is made of a glass fiber reinforced plastic.
  • the soldering lugs 3 of the resistance elements protrude laterally from the housing.
  • each spring support through an elongated hole in the housing, which engages in a groove in a spring tongue 4.
  • This spring tongue serves as a display element for the set tuning voltage or for the set channel. If the spindle is rotated, the shoulder of the spring carrier slides along the groove. Because the spring tongue is slightly curved or angled, the spring tongue makes a small swiveling movement when the spindle is rotated.
  • the free end 5 of the spring tongue 4 projects into an elongated window 6, which is in a lock rail 7 is recessed.
  • the length of the window corresponds approximately to the swivel movement.
  • Each of the spring tongues 4 is connected to a base part 9 via a joint part 8.
  • This base part 9 is held by several resilient expansion bodies 10 in one of the longitudinal walls 11 of the housing.
  • Base part 9, joint part 8, spring tongues 4 and expansion body 10 are made in one piece from plastic.
  • the spindle which is not visible in FIG. 1, has a push knob 12 which has a corrugated or otherwise non-slip edge. This allows the push button to be turned directly.
  • the push button 12 can also be provided with a cavity 13 which has a certain inner profile.
  • a socket wrench not shown in FIG. 1, is then inserted into this cavity, the socket wrench having an outer profile which interacts with the inner profile in the sense of being carried along.
  • a coupling element which is not visible in FIG. 1 and is made of plastic, is snapped between the push-button and the housing.
  • This coupling element has a spring tongue ring on the circumference, which interacts with a bevel on the outside of the push-button.
  • the rotary knob has an axially parallel internal toothing, the teeth of which, when pressed, protrude into a cross-shaped profile of the coupling element. As a result, the coupling element is taken along and a frequency range can be selected.
  • the coupling element also has an integrally formed pointer 14 which, depending on the detent position, is visible in one of the three display windows 15 of the blocking rail 7 arranged in the form of a segment of a circle for the frequency range selection.
  • a number of push buttons 16 are slidably mounted in the housing 1.
  • the preset channel can be switched on using these pushbuttons.
  • All pushbuttons can be mutually triggered by a locking rail 7.
  • the locking rail carries the display scale at the same time, the pushbutton unit can be constructed from a few individual parts and can therefore be manufactured more cost-effectively. Since the pushbutton unit is manufactured in large numbers, this saving is noticeable. If all pushbuttons have been accidentally pressed, they can be released by moving the locking rail, which is easily accessible from the outside.
  • Each pushbutton 16 has a laterally formed, beveled shoulder 17. This shoulder 17 cooperates with a sawtooth-shaped projection 18 in the locking rail 7 as a mutual trigger mechanism.
  • the locking rail 7 is pressed by a return spring 19 in a rest position.
  • this return spring is also a contact spring for a so-called mute switch contact. If a push button is pressed and the locking rail is moved, the return spring contacts a second contact spring 20 during the switching process. This is intended to suppress disruptive switching noises during channel switching.
  • the locking rail 7 is guided on the front outside of the housing in such a way that the locking rail has molded locking lugs 21 on its long sides, which cooperate with locking receptacles 22 on the housing.
  • the locking rail is provided on the underside with an integrally formed web 23 which extends from the transverse side in the direction of displacement and is guided in a groove 24 in the housing. Since the locking lugs protrude into the locking receptacles and the locking rail has to perform a displacement stroke, the locking receptacles 22 are designed as slots extending in the displacement direction, the length of which must correspond at least to the displacement stroke.
  • the openings 25 in the locking rail, through which the push buttons 12 and the push buttons 16 protrude, are likewise enlarged at least by the displacement stroke.
  • a mounting tab 26 is formed on the side of the narrow side, with the help of which the push-button assembly on the chassis, for. B. a television receiver can be attached.
  • each assembly has snap hooks 27 on one side of the housing, which engage in openings in the neighboring assembly.
  • locking lugs 28 are also present for the exact positioning of the structural units relative to one another. If several pushbutton assemblies are strung together, all pushbuttons should also trigger each other here.
  • each locking rail has a lateral driving arm 29 on one long side, which engages in a correspondingly profiled recess in the secondary locking rail and ensures play-free driving.

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP81102802A 1980-04-21 1981-04-11 Drucktastenaggregat Expired EP0038501B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3015292A DE3015292C2 (de) 1980-04-21 1980-04-21 Drucktastenaggregat
DE3015292 1980-04-21

Publications (3)

Publication Number Publication Date
EP0038501A2 EP0038501A2 (de) 1981-10-28
EP0038501A3 EP0038501A3 (en) 1982-05-12
EP0038501B1 true EP0038501B1 (de) 1984-07-04

Family

ID=6100569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102802A Expired EP0038501B1 (de) 1980-04-21 1981-04-11 Drucktastenaggregat

Country Status (5)

Country Link
US (1) US4368441A (es)
EP (1) EP0038501B1 (es)
JP (1) JPS56166623A (es)
DE (1) DE3015292C2 (es)
ES (1) ES501526A0 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3220407C2 (de) * 1982-05-29 1985-09-19 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt Drucktastenaggregat
US6166345A (en) * 1998-02-24 2000-12-26 Matsushita Electric Works, Ltd. See-saw switch
JP4941048B2 (ja) * 2007-03-28 2012-05-30 オムロン株式会社 トリガスイッチ

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT699906A (es) * 1962-06-16 1900-01-01
DE1541528B2 (de) * 1966-09-24 1971-12-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Rundfunkempfangsgeraet mit einer drucktasteneinstellvor richtung und einem skalenkasten
AT281145B (de) * 1967-02-18 1970-05-11 Preh Elektro Feinmechanik Tastenkanalwahlaggregat
NL6814204A (es) * 1968-10-04 1970-04-07
DE1933976C3 (de) * 1969-07-04 1974-03-07 Saba Schwarzwaelder Apparate- Bauanstalt, August Schwer Soehne Gmbh, 7730 Villingen Abstimmvorrichtung für HF-Nachrichten-Übertragungsgeräte
US3646283A (en) * 1970-04-20 1972-02-29 Globe Union Inc Multistation pushbutton switch assembly with master control means for alternative push-push or only one switch operable at a time modes of actuation
FR2198239B1 (es) * 1972-09-07 1975-03-07 Telic
DE2352230B2 (de) * 1973-10-18 1975-11-06 Schoeller & Co, Elektrotechnische Fabrik, 6000 Frankfurt Drucktastenaggregat
DE7418746U (de) * 1974-05-29 1974-09-05 Licentia Gmbh Drucktastensatz mit Stummschalter für einen Rundfunkempfänger
DE2549781A1 (de) * 1975-11-06 1977-05-18 Ruf Kg Wilhelm Abstimmeinheit mit bandumschalter fuer hochfrequenz-empfaenger

Also Published As

Publication number Publication date
ES8202460A1 (es) 1982-02-01
JPS56166623A (en) 1981-12-21
DE3015292C2 (de) 1985-10-17
US4368441A (en) 1983-01-11
ES501526A0 (es) 1982-02-01
DE3015292A1 (de) 1981-10-22
EP0038501A2 (de) 1981-10-28
JPS647692B2 (es) 1989-02-09
EP0038501A3 (en) 1982-05-12

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