DE4039413A1 - Radiotelephone earthing strip with row of projecting tabs - pressed into contact with PCB after stamping at bent-over edge of metallic strip - Google Patents
Radiotelephone earthing strip with row of projecting tabs - pressed into contact with PCB after stamping at bent-over edge of metallic stripInfo
- Publication number
- DE4039413A1 DE4039413A1 DE4039413A DE4039413A DE4039413A1 DE 4039413 A1 DE4039413 A1 DE 4039413A1 DE 4039413 A DE4039413 A DE 4039413A DE 4039413 A DE4039413 A DE 4039413A DE 4039413 A1 DE4039413 A1 DE 4039413A1
- Authority
- DE
- Germany
- Prior art keywords
- edge
- strip
- bent
- earthing
- housing
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/002—Casings with localised screening
- H05K9/0039—Galvanic coupling of ground layer on printed circuit board [PCB] to conductive casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
Abstract
Description
Gegenstand dieser Erfindung ist ein Erdungsblech für ein Funktelefon oder eine entsprechende Vorrichtung, das zwischen Gehäuse und Leiterplatte des Funktelefons angeordnet ist.The present invention relates to a grounding plate for a Radiotelephone or equivalent device that between Housing and circuit board of the radio telephone is arranged.
Das Problem, das mit dieser Erfindung beseitigt wird, steht in Verbindung zum Frequenzgenerator des Funktelefons. Bei der technischen Lösung, bei der sich Empfänger-VCO und Sender-VCO im Gehäuse sehr nahe beieinander befinden, ist die Herbeiführung einer ausreichenden Dämpfung zwischen diesen unerläßlich, das heißt das Signal keiner der beiden Oszillatoren darf zum anderen durchschlagen, denn dies führt zu Fehlsendungen/Fehlempfänge, die nicht den behördlichen Anforderungen entsprechen.The problem that is solved with this invention is in Connection to the frequency generator of the radio telephone. In the technical solution, where receiver VCO and transmitter VCO are very close to each other in the housing is the induction sufficient cushioning between these indispensable, the the signal means neither of the two oscillators is allowed to the other penetrate, because this leads to incorrect shipments / incorrect receptions, that do not meet official requirements.
Bei früheren Produkten löste man dieses Problem im allgemeinen durch Einsatz einer komplizierteren Konstruktion, das heißt man ordnete die VCOs in separaten Fächern oder sogar in einem völlig getrennten Gehäuse an - eine Konzeption, die im Vergleich zur vorliegenden Erfindung beträchtlich teurer zu stehen kommt. Eine andere die vorliegende Erfindung tangierende Lösung besteht darin, an die Leiterplatte von Hand anzulötende Bleche zu verwenden. Die dritte alternative Lösung besteht im Einsatz teurer keramischer Filter, die die Ausbreitung der Störsignale in der Senderkette verhindern.This problem was generally solved with earlier products by using a more complicated construction, that is the VCOs were organized in separate compartments or even in one completely separate housing - a concept that compares comes considerably more expensive to the present invention. Another solution involving the present invention exists in hand-soldering sheet metal to the circuit board use. The third alternative solution is in use expensive ceramic filter that prevents the spread of noise prevent in the transmitter chain.
Als Nachteil der letztgenannten Alternativen sei u. a. die kompliziertere Konstruktion des Gehäuses und damit die teurere Gießform genannt. Die anzulötenden Bleche wiederum erfordern in der Produktion einen zusätzlichen Arbeitsgang, was mit starker Zunahme der Stückzahlen kostspielig wird.As a disadvantage of the latter alternatives, u. a. the more complicated construction of the housing and thus the more expensive Called mold. The sheets to be soldered in turn require in production an additional operation, what with sharp increase in quantities becomes expensive.
Mit dieser Erfindung sollen die vorgenannten Mängel beseitigt werden. Für das erfindungsgemäße Erdungsblech ist kennzeichnend, daß sein zur Leiterplatte hin weisende Rand so rechtwinklig gebogen ist, daß er an der Leiterplatte anliegt, und daß an dem Rand mehrere aufeinanderfolgende federartige Fortsätze ausgebildet sind. Durch Einsatz der Erfindung erübrigen sich die vorgenannten kostspieligen Lösungen, denn das zwischen Leiterplatte und Gehäuse des Telefons zu liegen kommende Erdungsblech läßt sich beim Einbauen der Leiterplatte auf einfache Weise an die vorgesehene Stelle montieren. Die elastischen Fortsätze bewirken so eine ausgezeichnete Erdung der Leiterplatte am Gehäuse des Funktelefons.With this invention, the aforementioned shortcomings are to be remedied will. It is characteristic of the earthing plate according to the invention that that its edge facing the circuit board is so rectangular is bent that it lies against the circuit board, and that the edge several successive spring-like extensions are trained. By using the invention there is no need the aforementioned costly solutions because that between PCB and housing of the phone coming to lie Grounding plate can be opened when installing the circuit board easy to assemble at the intended location. The elastic extensions thus provide excellent grounding for the PCB on the housing of the radio telephone.
Für eine Ausführungsform der Erfindung ist charakteristisch, daß die Fortsätze von nach außen gestanzten schuppenförmigen Zünglein gebildet werden.It is characteristic of an embodiment of the invention that that the extensions of scale-like stamped outwards Tongues are formed.
Für eine andere Ausführungsform der Erfindung ist kennzeichnend, daß der hervorstehende Rand des Züngleins etwa 1 mm lang und 2 mm breit ist und aus dem abgewinkelten Rand etwa 0,5 mm hervorsteht.Another embodiment of the invention is characterized by that the protruding edge of the tongue is about 1 mm long and Is 2 mm wide and about 0.5 mm from the angled edge protrudes.
Für eine dritte Ausführungsform der Erfindung ist kennzeichnend, daß das Erdungsblech im Querschnitt U-Form hat und die Zünglein an dem Rand zwischen den beiden Schenkeln des U angeordnet sind.A third embodiment of the invention is characterized by that the earthing plate has a U-shaped cross section and the tongue are arranged on the edge between the two legs of the U.
Für eine Ausführungsform der Erfindung ist noch kennzeichnend, daß in die Schenkel des U Auskerbungen eingearbeitet sind, in die am Gehäuse ausgebildetet Gußteile eingreifen.For an embodiment of the invention it is also characteristic that that are machined in the legs of the U, in which engage castings formed on the housing.
Im folgenden wird die Erfindung an Hand eines Beispiels unter Bezugnahme auf die beigefügte Zeichung beschrieben. Es zeigtThe invention is illustrated below using an example Described with reference to the accompanying drawing. It shows
Fig. 1 Teile des geöffneten Funktelefons, Fig. 1 parts of the open radio telephone,
Fig. 2 das Erdungsblech schräg von oben betrachtet, Fig. 2, the grounding plate obliquely viewed from above,
Fig. 3 das eine Ende des Erdungsbleches seitlich betrachtet, und Fig. 3 viewed one end of the grounding plate from the side, and
Fig. 4 das Erdungsblech stirnseitig betrachtet. Fig. 4 considered the earthing plate on the face.
Das Erdungsblech 1 des Funktelefons ist zwischem dem Gehäuse 2 und der Leiterplatte 3 des Funktelefons angeordnet. Der zur Leiterplatte 3 hin weisende Rand 4 des Erdungsbleches 1 ist so rechtwinklig abgebogen, daß er sich gegen die Leiterplatte legt. An dem Rand 4 sind mehrere aufeinanderfolgende federartige Fortsätze 5 angeordnet. Diese Fortsätze 5 werden von nach außen gestanzten schuppenartigen Zünglein gebildet. Die hervorstehende Kante des einzelnen Züngleins 5 ist etwa 1 mm lang und 2 mm breit und steht um etwa 0,5 mm aus dem umgebogenen Rand 4 her vor. Das Erdungsblech 1 hat im Querschnitt U-Form, wobei sich die Zünglein 5 an dem Rand zwischen den Schenkeln 6, 7 des U befinden. Die Schenkel 6, 7 des U haben Auskerbungen 8, in die vom Funktelefongehäuse hervorstehende Gußteile eingreifen. Das Erdungsblech 1 läßt sich mühelos an das Funktelefongehäuse montieren, wonach die Leiterplatte 3 eingespannt wird, wodurch die Zünglein 5 des Erdungsbleches Kontakt mit der Leiterplatte erhalten. Ein solches Erdungsblech ist im Vergleich zu den bekannten Lösungen beträchtlich schneller und leichter zu montieren und läßt sich außerdem preisgünstig herstellen.The grounding plate 1 of the radio telephone is arranged between the housing 2 and the printed circuit board 3 of the radio telephone. The edge 4 of the earthing plate 1 pointing towards the printed circuit board 3 is bent at right angles so that it lies against the printed circuit board. Several successive spring-like extensions 5 are arranged on the edge 4 . These extensions 5 are formed by outwardly punched scaly tongues. The protruding edge of the individual tongue 5 is about 1 mm long and 2 mm wide and protrudes from the bent edge 4 by about 0.5 mm. The grounding plate 1 has a U-shaped cross section, the tongues 5 being located on the edge between the legs 6 , 7 of the U. The legs 6 , 7 of the U have notches 8 , into which cast parts projecting from the radio telephone housing engage. The grounding plate 1 can be easily mounted on the radio telephone housing, after which the circuit board 3 is clamped, whereby the tongues 5 of the grounding plate get contact with the circuit board. Such a grounding plate is considerably faster and easier to assemble in comparison to the known solutions and can also be produced inexpensively.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900356A FI900356A (en) | 1990-01-23 | 1990-01-23 | JORDNINGSPLAOT FOER RADIO TELEPHONE. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4039413A1 true DE4039413A1 (en) | 1991-07-25 |
Family
ID=8529760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4039413A Ceased DE4039413A1 (en) | 1990-01-23 | 1990-12-10 | Radiotelephone earthing strip with row of projecting tabs - pressed into contact with PCB after stamping at bent-over edge of metallic strip |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE4039413A1 (en) |
FI (1) | FI900356A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9417135U1 (en) * | 1994-10-25 | 1994-12-15 | Siemens Ag | Assembly |
WO1994029651A1 (en) * | 1993-06-15 | 1994-12-22 | Samsung Electronics Co., Ltd. | An earth system for a window-type air conditioner |
EP0756446A1 (en) * | 1995-07-27 | 1997-01-29 | Molex Incorporated | Connecting terminal for electromagnetic shield |
EP1207733A1 (en) * | 2000-11-20 | 2002-05-22 | LK Engineering A/S | Method of manufacturing items with bend projections |
EP1207734A1 (en) * | 2000-11-20 | 2002-05-22 | LK Engineering A/S | Method of manufacturing items with bend projections |
-
1990
- 1990-01-23 FI FI900356A patent/FI900356A/en not_active Application Discontinuation
- 1990-12-10 DE DE4039413A patent/DE4039413A1/en not_active Ceased
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994029651A1 (en) * | 1993-06-15 | 1994-12-22 | Samsung Electronics Co., Ltd. | An earth system for a window-type air conditioner |
DE9417135U1 (en) * | 1994-10-25 | 1994-12-15 | Siemens Ag | Assembly |
EP0756446A1 (en) * | 1995-07-27 | 1997-01-29 | Molex Incorporated | Connecting terminal for electromagnetic shield |
US5876223A (en) * | 1995-07-27 | 1999-03-02 | Molex Incorporated | Connecting terminal for electromagnetic shield |
EP1207733A1 (en) * | 2000-11-20 | 2002-05-22 | LK Engineering A/S | Method of manufacturing items with bend projections |
EP1207734A1 (en) * | 2000-11-20 | 2002-05-22 | LK Engineering A/S | Method of manufacturing items with bend projections |
Also Published As
Publication number | Publication date |
---|---|
FI900356A (en) | 1991-07-24 |
FI900356A0 (en) | 1990-01-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8131 | Rejection |