EP0387657B1 - Unité d'affichage pour appareil électrique - Google Patents

Unité d'affichage pour appareil électrique Download PDF

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Publication number
EP0387657B1
EP0387657B1 EP90104206A EP90104206A EP0387657B1 EP 0387657 B1 EP0387657 B1 EP 0387657B1 EP 90104206 A EP90104206 A EP 90104206A EP 90104206 A EP90104206 A EP 90104206A EP 0387657 B1 EP0387657 B1 EP 0387657B1
Authority
EP
European Patent Office
Prior art keywords
frame
circuit board
display unit
unit according
display
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
EP90104206A
Other languages
German (de)
English (en)
Other versions
EP0387657A1 (fr
Inventor
Hans Ludwig Dipl.-Ing. Betzler (Fh)
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0387657A1 publication Critical patent/EP0387657A1/fr
Application granted granted Critical
Publication of EP0387657B1 publication Critical patent/EP0387657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/18—Means for attaching signs, plates, panels, or boards to a supporting structure
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/18—Means for attaching signs, plates, panels, or boards to a supporting structure
    • G09F2007/1843—Frames or housings to hold signs

Definitions

  • the invention relates to a display unit for electrical devices, with a with display symbols such as Characterized sight glass, a frame that can be attached to the front of the device, a closed sealing ring that can be inserted in a groove between the frame and the front of the device, and a circuit board provided with display elements on the front.
  • a display unit is provided in the housing for electrical devices known from DE-GM 82 13 979.
  • the frame is held on the front plate by means of fastening screws which are inserted at four corner points and can be screwed into threaded blind holes in the front plate of the housing and are designed as captive neck screws.
  • the sealing ring is assigned to the front plate, in which it is inserted into a groove of a web running around the opening of the front plate.
  • the sight glass is placed loosely on the web and pressed against the sealing ring of the web by the screwed frame.
  • the printed circuit board with display elements is also assigned to the front plate of the housing and screwed to the back of the front plate.
  • the known display unit is thus made up of individual, loose elements or elements assigned to or attached to the front panel and not as an assembly.
  • this structure enables the individually inserted display elements or the sight glass to be replaced without having to remove the front plate or open the device, it does require a certain amount of assembly work when arranging the individual elements on the front plate of the housing and thus also a certain amount of service work, Exchange or measurement purposes.
  • the invention is therefore based on the object of specifying a more assembly and maintenance-friendly structure for a display unit of the type mentioned.
  • a display unit of the type mentioned according to the invention in that the frame on the front with a recess surrounding the frame recess for receiving and fastening the sight glass and on the back facing the device with the groove for the sealing ring and within the area defined by this groove is formed with a plurality of fastening points for the printed circuit board, and that the printed circuit board is provided with line connection means and a metal cover which is recessed in the region of the line connection means and can be fastened to the frame via the fastening points for the printed circuit board is provided on its rear side.
  • the structure of such a display unit is combined to form an independent assembly, the frame serving as the support for all the individual parts of the display unit and thus as the support for the assembly.
  • the display unit can be screwed on to a front of the device as an independent compact module that is mechanically protected and electrically shielded by the metal cover.
  • the entire assembly can be used without further measures, such as Remove the front panel and / or open the device, remove it slightly.
  • the structure of the display unit according to the invention thus results in a cost saving during assembly, when installing on a device or during service at the site of an increased ease of maintenance without the use of special tools.
  • the device in FIGS. 1 and 2 is, for example, a short-wave power amplifier and has a removable, screw-fastened front plate 1 on its front, which is equipped with two device handles 2, 3 and connectors 4, 5 and 6 required for operation.
  • a display unit 10 Above the transverse cooling air inlet opening 7 there is a display unit 10 on which certain states, values and performance data should be recognizable or readable when the device is in operation.
  • the display elements and their preparation - as will be described later - are built on a printed circuit board of the display unit and are supplied with electricity from the device via connection cables or lines.
  • the structure of the display unit is combined to form an independent assembly as a compact module and is structured as follows:
  • a frame 11 (FIG. 3) consisting of an inexpensive cast part is provided, the recess 12 of which is surrounded on the front side of the frame by a recess 13 in which a sight glass 14, e.g. a color-coordinated, rectangular acrylic glass pane, recorded and e.g. is attached by gluing.
  • the sight glass 14 is on the front with display symbols, i.e. with the corresponding device-specific names and details, printed using the screen printing process.
  • the rear side of the sight glass 14, which can be seen in FIG. 4, is also printed.
  • This printing is flat all the way to certain areas and therefore only allows an outside view of the display elements 34, 35 and 36 of a circuit board 33 and allows the light to enter a photocell 37 which is also arranged on the front of the circuit board and which regulates the brightness of the display elements .
  • the frame 11 On the back facing the device, the frame 11 is provided with a circumferential groove 15 for a closed sealing ring 16, in which case - in order to ensure a seal in the installed state - the clear width of the invisible installation opening provided in the front plate 1 up to a maximum of the inner edge the groove 15 is enough.
  • fastening points 17, 18, 19 and 20 are provided on the back of the frame 11 within the area delimited by the groove 15 at four corner points of the frame recess for supporting and fastening the printed circuit board 33, and are designed here as towers with threaded blind holes.
  • the fastening points 17 to 20 are connected by stiffening webs 21, 22, 23 and 24 which surround the frame recess 12 in a rectangular shape and on the long sides are higher than on the shorter transverse sides in order to make do with only four fastening screws when assembling the entire assembly on the front panel.
  • three raised attachment points 25, 26 and 27 are provided, at which the raw part of the frame can be attached in order to always start from the center point of the frame when machining the raw part - regardless of the tolerances. This eliminates the time-consuming and costly task of centering the frame on the work table.
  • the circuit board 33 is equipped on its front side with the display elements 34, 35 and 36 and the already mentioned photocell 37 also with other components, including with a heat generating semiconductor, e.g. a controller 38.
  • This heat-generating component 38 is arranged on an approximately Z-shaped heat-conducting sheet metal bracket 39, which is fastened on the one hand to the printed circuit board 33 with one leg 40 and on the other hand with the other leg 41, which is cut through a recess 42 at one corner of the printed circuit board 33 engages, is connected to a metal cover 44 in a thermally conductive manner.
  • the angled metal cover 44 on the upper and lower longitudinal edge serves as external, mechanical protection and as electrical shielding on the back of the circuit board and is by means of four threaded bolts, of which only the threaded bolts 45 and 46 can be seen in FIG serve to fasten the printed circuit board 33 to the fastening points 17 to 20, held on the frame 11 via these fastening points.
  • the metal cover 44 is also at a corner in the area of the line connection means 43 provided on the printed circuit board 33, e.g. in the form of connectors, recessed in order to be able to connect the connecting and supply lines 47 (FIG. 2) to the connectors on the soldering side of the printed circuit board.
  • the complete assembly forming a display unit is - as can be seen in FIGS. 1 and 2 - at four corner points 28, 29, 30 and 31 of the frame 11 by means of four as captive Phillips-head screws 32 designed fastening screws fastened in threaded bushings 8 provided on the rear of the front plate 1.
  • the connecting or supply lines 47 are first plugged into the circuit board 33, then the frame 11 is inserted at a slight angle into the installation opening of the front panel 1 and screwed tight.
  • the entire assembly can be easily removed as a whole for service, exchange or measurement purposes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Claims (7)

  1. Unité d'affichage pour appareils électriques, comportant un voyant (14), qui est pourvu de symboles d'affichage, comme par exemple des caractères d'écriture, un cadre (11) pouvant être fixé à la face avant de l'appareil, une bague d'étanchéité fermée (16), qui peut être insérée dans une rainure entre le cadre et la face avant de l'appareil, et une plaquette à circuits imprimés (33) comportant des éléments d'affichage sur sa face avant,
    caractérisée par le fait que le cadre (11) présente, au niveau de sa face avant, un renfoncement (13) qui entoure l'évidement (12) du cadre et qui sert à loger et à fixer le voyant (14) et, au niveau de la face arrière tournée vers l'appareil comportant la rainure (15) pour la bague d'étanchéité (16) et à l'intérieur de la zone entourée par cette rainure, plusieurs points de fixation (17,18,19,20) pour la plaquette à circuits imprimés (33), et que la plaquette à circuits imprimés (33) est équipée de moyens (43) de raccordement de lignes et comporte, au niveau de sa face arrière, un couvercle métallique (44), qui est évidé dans la zone des moyens (43) de raccordement de lignes et peut être fixé sur le cadre (11) par l'intermédiaire des points de fixation (17 à 20) prévus pour la plaquette à circuits imprimés (33).
  2. Unité d'affichage suivant la revendication 1, caractérisée par le fait que le cadre (11) est formé d'une pièce en fonte.
  3. Unité d'affichage suivant la revendication 1 ou 2, caractérisée par le fait que les points de fixation (17 à 20) pour la plaquette à circuits imprimés (33) sont disposés sur la face arrière du cadre (11) au niveau de quatre angles de l'évidement (12) du cadre et sont agencés sous la forme d'embouts pourvus d'un taraudage.
  4. Unité d'affichage suivant la revendication 3, caractérisée par le fait que les points de fixation (17 à 20) réalisés en forme d'embouts et prévus pour la plaquette à circuits imprimés (33), sont raccordés par des barrettes de renforcement (21 à 24) entourant l'évidement (12) du cadre.
  5. Unité d'affichage suivant l'une des revendications précédentes, caractérisée par le fait qu'un composant (38) dégageant de la chaleur est fixé sur la face avant de la plaquette à circuits imprimés (33) au moyen d'une cornière en tôle (32) approximativement en forme de Z, que la plaquette à circuits imprimés (33) possède un évidement (42) pour une aile (41) de la cornière en tôle (39), et que cette aile (41) de la cornière en tôle est raccordée au couvercle métallique (44).
  6. Unité d'affichage suivant l'une des revendications précédentes, caractérisée par le fait que le voyant (14) est fixé par collage dans le renfoncement (13) au niveau de la face avant du cadre (11).
  7. Unité d'affichage suivant l'une des revendications précédentes, caractérisée par le fait que sur le voyant (14) une impression est appliquée, au moyen du procédé de sérigraphie, sur la face avant portant les symboles d'affichage et sur la face arrière à plat, hormis au niveau des zones occupées par les éléments d'affichage (34 à 36) et par une cellule photoélectrique (37) de la plaquette à circuits imprimés (33).
EP90104206A 1989-03-08 1990-03-05 Unité d'affichage pour appareil électrique Expired - Lifetime EP0387657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907537 1989-03-08
DE3907537 1989-03-08

Publications (2)

Publication Number Publication Date
EP0387657A1 EP0387657A1 (fr) 1990-09-19
EP0387657B1 true EP0387657B1 (fr) 1993-10-06

Family

ID=6375864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104206A Expired - Lifetime EP0387657B1 (fr) 1989-03-08 1990-03-05 Unité d'affichage pour appareil électrique

Country Status (2)

Country Link
EP (1) EP0387657B1 (fr)
DE (1) DE59002964D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2068667A1 (fr) * 1991-06-25 1992-12-26 Tom Halvorsen Systeme de commande interactif physiquement reconfigurable
US5229925A (en) * 1991-07-19 1993-07-20 Valcom, Inc. Modular front panel and enclosure for electronic apparatus
US6480753B1 (en) * 1998-09-04 2002-11-12 Ncr Corporation Communications, particularly in the domestic environment
US7710714B2 (en) * 2004-09-13 2010-05-04 Bettcher Industries, Inc. Housing for scale or load cell controller
TW201228389A (en) * 2010-12-31 2012-07-01 Altek Corp Fixed structure of display module and electron device thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8006763U1 (de) * 1980-03-12 1985-05-23 Siemens AG, 1000 Berlin und 8000 München Bedienteil für ein in ein Fahrzeug eingebautes Funksprechgerät
DE8213979U1 (de) * 1982-05-13 1982-08-26 Siemens AG, 1000 Berlin und 8000 München Gehäuse für elektrotechnische Geräte
DE8812061U1 (de) * 1988-09-23 1988-11-17 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum Zuordnen von Bedien- und/oder Anzeigeelementen zu den in einer Sichtblende befindlichen Öffnungen

Also Published As

Publication number Publication date
EP0387657A1 (fr) 1990-09-19
DE59002964D1 (de) 1993-11-11

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