FR2766050A1 - Earth terminal for pcb inside metal box - Google Patents
Earth terminal for pcb inside metal box Download PDFInfo
- Publication number
- FR2766050A1 FR2766050A1 FR9708722A FR9708722A FR2766050A1 FR 2766050 A1 FR2766050 A1 FR 2766050A1 FR 9708722 A FR9708722 A FR 9708722A FR 9708722 A FR9708722 A FR 9708722A FR 2766050 A1 FR2766050 A1 FR 2766050A1
- Authority
- FR
- France
- Prior art keywords
- connection
- printed circuit
- pin
- button
- substrate
- 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
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
-
- 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
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1417—Mounting supporting structure in casing or on frame or rack having securing means for mounting boards, plates or wiring boards
- H05K7/142—Spacers not being card guides
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
STRUCTURE DE MISE A LA MASSE
ET PROCEDE DE MISE A LA MASSE POUR METTRE UN
CIRCUIT IMPRIME A LA MASSE D'UN BOITIER DU CIRCUIT
IMPRIME
En équipementerie, en appareillage électrique et électronique et autres branches d'activité faisant appel à des circuits électriques et électroniques, on rencontre souvent des moyens comprenant dans un boîtier métallique et sur un substrat des pistes conductrices imprimées et des composants.GROUNDING STRUCTURE
AND GROUNDING METHOD FOR PUTTING A
CIRCUIT PRINTED IN THE GROUND OF A CIRCUIT BOX
PRINTED
In equipment, electrical and electronic equipment and other branches of activity calling on electrical and electronic circuits, means are often encountered comprising, in a metal case and on a substrate, printed conductive tracks and components.
Afin d'éviter tout problème électromagnétique entre le circuit et le boîtier métalliqùe gênant le fonctionnement du circuit, il est nécessaire de relier électriquement différents points du circuit imprimé au boîtier métallique, en mettant ainsi le circuit imprimé à la masse du boîtier. In order to avoid any electromagnetic problem between the circuit and the metal case interfering with the operation of the circuit, it is necessary to electrically connect different points of the printed circuit to the metal case, thus putting the printed circuit to the ground of the case.
La branche d'activité évoquée ci-dessus par la demanderesse est celle de l'équipementerie automobile et plus particulièrement celle des calculateurs de contrôle des paramètres d'un moteur de véhicule automobile, mais à ne considérer vraiment ici que comme un exemple. The industry mentioned above by the Applicant is that of automotive equipment and more particularly that of control computers for the parameters of a motor vehicle engine, but to be considered here only as an example.
Dans l'art antérieur, le substrat était fixé au boîtier à l'aide de vis auto-taraudeuses engagées dans des alésages du boîtier assurant également la connexion électrique du circuit imprimé et du boîtier. In the prior art, the substrate was fixed to the housing using self-tapping screws engaged in bores of the housing also ensuring the electrical connection of the printed circuit and the housing.
Aujourd'hui, le substrat peut être simplement monté en appui sur le boîtier et sa fixation ne plus donc être nécessaire. Today, the substrate can be simply mounted in abutment on the housing and its fixing therefore no longer be necessary.
Cependant, on procède toujours à de multiples opérations de perçage et vissage afin d'assurer le maillage de masse du circuit imprimé.However, multiple drilling and screwing operations are always carried out in order to ensure the mass mesh of the printed circuit.
L'invention vise à supprimer ces opérations, coûteuses en main d'oeuvre. The invention aims to eliminate these operations, which are labor-intensive.
A cet effet, l'invention concerne une structure de mise à la masse pour mettre un circuit imprimé à la masse d'un boîtier du circuit imprimé, caractérisée par le fait qu'elle comprend au moins un pion de connexion solidaire du boîtier et au moins une griffe de connexion en prise sur le pion et connectée au circuit imprimé. To this end, the invention relates to a grounding structure for grounding a printed circuit of a box of the printed circuit, characterized in that it comprises at least one connection pin secured to the box and to the minus a connection shoe engaged on the pin and connected to the printed circuit.
Avantageusement, la griffe de connexion est solidaire de moyens de retenue mécanique au circuit imprimé. Advantageously, the connection claw is secured to mechanical retaining means on the printed circuit.
Avantageusement encore, la griffe de connexion est montée sur un bouton de connexion destiné à recevoir le pion de connexion. Advantageously also, the connection claw is mounted on a connection button intended to receive the connection pin.
Grâce à cela; on peut poser les boutons de connexion de façon automatique, avec d'autres composants, notamment avec les composants montés en surface dits CMS. Thanks to that; the connection buttons can be installed automatically, with other components, in particular with the surface-mounted components known as CMS.
L'invention concerne aussi un procédé pour mettre un circuit imprimé à la masse d'un boîtier du circuit, au cours duquel on sort un pion de connexion en saillie hors du boîtier, on soude un bouton de connexion au circuit imprimé, et on relie mécaniquement le pion et le bouton de connexion pour les relier électriquement. The invention also relates to a method for grounding a printed circuit of a circuit box, during which a protruding connection pin comes out of the box, a connection button is soldered to the printed circuit, and it is connected mechanically the pin and the connection button to connect them electrically.
L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation préférée de la structure de mise à la masse et d'un mode de mise en oeuvre préféré du procédé de l'invention, en référence au dessin annexé sur lequel:
- la figure 1 représente une vue en perspective de la forme de réalisation préférée de la structure de mise à la masse de l'invention;
- la figure 2 représente une vue en coupe de la structure de mise à la masse de la figure 1, le long du plan II-II; et
- la figure 3 représente une vue en coupe de la structure de mise à la masse de la figure 1, le long du plan III-III. The invention will be better understood with the aid of the following description of a preferred embodiment of the grounding structure and of a preferred embodiment of the method of the invention, with reference to the drawing annexed on which:
- Figure 1 shows a perspective view of the preferred embodiment of the grounding structure of the invention;
- Figure 2 shows a sectional view of the earthing structure of Figure 1, along the plane II-II; and
- Figure 3 shows a sectional view of the grounding structure of Figure 1, along the plane III-III.
Dans l'exemple particulier de la description, la structure de mise à la masse fait partie d'un calculateur de contrôle des paramètres d'un moteur de véhicule automobile comprenant un circuit imprimé 2 et un boîtier métallique 3 du circuit imprimé 2. In the particular example of the description, the grounding structure is part of a computer for controlling the parameters of a motor vehicle engine comprising a printed circuit 2 and a metal case 3 of the printed circuit 2.
La demanderesse entend toutefois ne pas limiter la portée de sa demande à cet exemple particulier, mais au contraire l'étendre à tout ensemble comprenant un circuit imprimé et un boîtier du circuit imprimé. The applicant intends, however, not to limit the scope of its request to this particular example, but on the contrary to extend it to any assembly comprising a printed circuit and a printed circuit box.
La structure de mise à la masse du calculateur est destiné à mettre le circuit imprimé 2 à la masse du boîtier métallique 3, en reliant électriquementune pluralité de points du circuit imprimé 2 au boîtier 3. The computer grounding structure is intended to ground the printed circuit 2 to the ground of the metal case 3, by electrically connecting a plurality of points of the printed circuit 2 to the case 3.
Le circuit imprimé 2 du calculateur comprend des composants électriques et électroniques, non représentés, supportés par l'une des faces 7 du substrat 1 du circuit imprimé 2, et des pistes conductrices 6, 6' imprimées sur la face 7. The printed circuit 2 of the computer comprises electrical and electronic components, not shown, supported by one of the faces 7 of the substrate 1 of the printed circuit 2, and conductive tracks 6, 6 ′ printed on the face 7.
Le circuit imprimé 2 et son substrat 1 sont placés dans un boîtier métallique 3, le substrat 1 étant ici monté en appui sur le boîtier métallique 3, par une face d'appui 8 opposée à la face support 7. The printed circuit 2 and its substrate 1 are placed in a metal case 3, the substrate 1 here being mounted in abutment on the metal case 3, by a support face 8 opposite the support face 7.
La structure de mise à la masse comprend une pluralité d'îlots de connexion, tous identiques à celui représenté sur le dessin et qui va maintenant être décrit. La pluralité d'îlots forment un maillage de masse du circuit imprimé 2. The grounding structure comprises a plurality of connection islands, all identical to that shown in the drawing and which will now be described. The plurality of islands form a ground mesh of the printed circuit 2.
Chaque îlot de connexion comprend un bouton de connexion 5, connecté au circuit imprimé 2, un pion de connexion 4 solidaire du boîtier 3, faisant respectivement office de connecteur femelle et de connecteur mâle, et un orifice 20 ménagé dans le substrat 1 du circuit imprimé 2. Each connection island comprises a connection button 5, connected to the printed circuit 2, a connection pin 4 secured to the housing 3, acting respectively as a female connector and a male connector, and an orifice 20 formed in the substrate 1 of the printed circuit. 2.
Le bouton de connexion 5 comprend une surface de succion 10, pour être monté en automatique sur le circuit imprimé 2, et une base ouverte 9 s'étendant respectivement dans deux plans perpendiculaires à un axe il de symétrie du bouton 5. La section transversale du bouton 5, perpendiculairement à l'axe 11, est ici rectangulaire. The connection button 5 comprises a suction surface 10, to be mounted automatically on the printed circuit 2, and an open base 9 extending respectively in two planes perpendicular to an axis il of symmetry of the button 5. The cross section of the button 5, perpendicular to axis 11, is here rectangular.
Deux clips de retenue mécanique 16, 17, élastiques, prolongent la surface de succion 10 parallèlement à l'axe de symétrie il et sont pourvus à leur extrémité libre de deux doigts de retenue respectifs. Two mechanical retaining clips 16, 17, elastic, extend the suction surface 10 parallel to the axis of symmetry 11 and are provided at their free end with two respective retaining fingers.
Le bouton 5 comprend deux griffes de connexion 13, 13' et deux paires 14, 15, 14', 15' de pattes de connexion associées. The button 5 comprises two connection claws 13, 13 'and two pairs 14, 15, 14', 15 'of associated connection lugs.
Les deux griffes 13, 13' sont constituées par les extrémités libres recourbées vers l'axe 11 de deux prolongements de griffe 12, 12' s'étendant sensiblement parallèlement à l'axe 11 depuis la surface de succion 10. La longueur des prolongements de griffe 12, 12' le long de l'axe 11 est légèrement inférieure à la distance séparant la surface de succion 10 et la base ouverte 9. The two claws 13, 13 ′ are constituted by the free ends curved towards the axis 11 of two claw extensions 12, 12 ′ extending substantially parallel to the axis 11 from the suction surface 10. The length of the extensions claw 12, 12 'along the axis 11 is slightly less than the distance separating the suction surface 10 and the open base 9.
Les prolongements de griffe 12, 12' sont élastiques et peuvent être écartés élastiquement de l'axe 11 contre l'action d'une force de rappel. The claw extensions 12, 12 ′ are elastic and can be spaced elastically from the axis 11 against the action of a restoring force.
On soulignera que les deux paires 14-15, 14'-15' de pattes de connexion s 'étendant dans le plan de la base ouverte 9 et les deux griffes de connexion 13, 13' se prolongent les uns les autres. It will be emphasized that the two pairs 14-15, 14'-15 'of connection lugs extending in the plane of the open base 9 and the two connection claws 13, 13' extend each other.
Le bouton 5 est monté sur la face support 7 du substrat 1, sa base ouverte 9 étant diposée au droit de l'orifice 20 du substrat 1. The button 5 is mounted on the support face 7 of the substrate 1, its open base 9 being disposed in line with the orifice 20 of the substrate 1.
Les paires 14-15, 14'-15' de pattes de connexion sont soudées respectivement à deux pistes conductrices 6, 6' du circuit imprimé 2. The pairs 14-15, 14'-15 'of connection lugs are welded respectively to two conductive tracks 6, 6' of the printed circuit 2.
Le bouton de connexion 5 coiffe le pion de connexion 4, en saillie hors du boîtier 3 et traversant l'orifice 20 ménagé dans le substrat 1. The connection button 5 covers the connection pin 4, projecting from the housing 3 and passing through the orifice 20 formed in the substrate 1.
Les griffes de connexion 13, 13' du bouton 5 sont en prise sur le pion 4 afin d'assurer la connexion électrique du circuit imprimé 2 au boîtier 3, par l'intermédiaire des pistes conductrices 6, 6', des pattes de connexion 14-15, 14'-15', des griffes de connexion 13, 13' et du pion 4. The connection claws 13, 13 ′ of the button 5 are engaged on the pin 4 in order to ensure the electrical connection of the printed circuit 2 to the housing 3, via the conductive tracks 6, 6 ′, the connection lugs 14 -15, 14'-15 ', connection claws 13, 13' and pin 4.
En outre, les deux clips de retenue 16, 17, sont introduits dans des orifices 21, 22 du substrat 1 afin de maintenir solidement le bouton 5 sur le substrat 1. In addition, the two retaining clips 16, 17 are introduced into orifices 21, 22 of the substrate 1 in order to firmly hold the button 5 on the substrate 1.
Pour monter la structure de mise à la masse, autrement dit pour mettre le circuit imprimé 2 à la masse du boîtier 3, on ménage une pluralité d'orifices 20 au travers du substrat 1, et on sort une pluralité de pions de connexion 4 ici directement de fonderie avec le boîtier 3. To mount the grounding structure, in other words to ground the printed circuit 2 of the housing 3, a plurality of orifices 20 are formed through the substrate 1, and a plurality of connection pins 4 are taken out here directly from the foundry with the housing 3.
On monte une pluralité de boutons 5 sur le substrat 1 respectivement au droit de la pluralité des orifices 20 tout en clipsant les boutons 5 sur le substrat 1. Pour chaque bouton 5, on soude ses deux paires de pattes de connexion 14, 15 et 14', 15' respectivement à deux pistes conductrices 6, 6' du circuit 2. A plurality of buttons 5 are mounted on the substrate 1 respectively in line with the plurality of orifices 20 while clipping the buttons 5 on the substrate 1. For each button 5, its two pairs of connection lugs 14, 15 and 14 are welded ', 15' respectively to two conductive tracks 6, 6 'of circuit 2.
On pose le substrat 1 sur le boîtier 3, par sa face d'appui 8, en introduisant dans chaque bouton 5 l'un des pions de connexion 4 au travers de l'orifice 20. On relie ainsi mécaniquement la pluralité de pions de connexion 4 à la pluralité de boutons de connexions, respectivement, pour les relier électriquement et par conséquent, mettre le circuit imprimé 2 à la masse du boîtier 3. The substrate 1 is placed on the housing 3, by its support face 8, by introducing into each button 5 one of the connection pins 4 through the orifice 20. The plurality of connection pins are thus mechanically connected 4 to the plurality of connection buttons, respectively, to connect them electrically and consequently, put the printed circuit 2 to the ground of the housing 3.
respectivement, pour les relier électriquement et par conséquent, mettre le circuit imprimé 2 à la masse du boîtier 3.respectively, to connect them electrically and therefore, put the printed circuit 2 to the ground of the housing 3.
Dans la description qui vient d'être faite, la structure de mise à la masse comprend une pluralité d'îlots de connexion, mais on pourrait envisager qu'elle n'en comporte qu'un seul. In the description which has just been made, the grounding structure comprises a plurality of connection islands, but it could be envisaged that it comprises only one.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9708722A FR2766050B1 (en) | 1997-07-09 | 1997-07-09 | GROUNDING STRUCTURE AND GROUNDING METHOD FOR GROUNDING A PRINTED CIRCUIT OF A PRINTED CIRCUIT BOX |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9708722A FR2766050B1 (en) | 1997-07-09 | 1997-07-09 | GROUNDING STRUCTURE AND GROUNDING METHOD FOR GROUNDING A PRINTED CIRCUIT OF A PRINTED CIRCUIT BOX |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2766050A1 true FR2766050A1 (en) | 1999-01-15 |
| FR2766050B1 FR2766050B1 (en) | 1999-08-20 |
Family
ID=9509051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9708722A Expired - Fee Related FR2766050B1 (en) | 1997-07-09 | 1997-07-09 | GROUNDING STRUCTURE AND GROUNDING METHOD FOR GROUNDING A PRINTED CIRCUIT OF A PRINTED CIRCUIT BOX |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2766050B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6755631B2 (en) * | 2001-07-16 | 2004-06-29 | Sanyo Electric Co., Ltd. | Securing means for a compressor's terminal box |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0549403A1 (en) * | 1991-12-20 | 1993-06-30 | Thomson-Csf | Method and device to prevent loss of a screw for fastening a printed circuit board to a support |
| JPH0786770A (en) * | 1993-09-13 | 1995-03-31 | Fujitsu Ltd | Accommodating and fixing structure for component to plastic case |
| US5519169A (en) * | 1994-03-23 | 1996-05-21 | Dell Usa, L.P. | EMI grounding cap structure for use in mounting a printed circuit board on a plated housing boss |
-
1997
- 1997-07-09 FR FR9708722A patent/FR2766050B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0549403A1 (en) * | 1991-12-20 | 1993-06-30 | Thomson-Csf | Method and device to prevent loss of a screw for fastening a printed circuit board to a support |
| JPH0786770A (en) * | 1993-09-13 | 1995-03-31 | Fujitsu Ltd | Accommodating and fixing structure for component to plastic case |
| US5519169A (en) * | 1994-03-23 | 1996-05-21 | Dell Usa, L.P. | EMI grounding cap structure for use in mounting a printed circuit board on a plated housing boss |
Non-Patent Citations (2)
| Title |
|---|
| "UNIVERSAL CARD RETAINER", 1 July 1994, IBM TECHNICAL DISCLOSURE BULLETIN, VOL. 37, NR. 7, PAGE(S) 537, XP000455608 * |
| PATENT ABSTRACTS OF JAPAN vol. 095, no. 006 31 July 1995 (1995-07-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6755631B2 (en) * | 2001-07-16 | 2004-06-29 | Sanyo Electric Co., Ltd. | Securing means for a compressor's terminal box |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2766050B1 (en) | 1999-08-20 |
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|---|---|---|---|
| ST | Notification of lapse |