GB2589629A - Assembly securing a printed circuit board, and assembling process therefor - Google Patents
Assembly securing a printed circuit board, and assembling process therefor Download PDFInfo
- Publication number
- GB2589629A GB2589629A GB1917837.5A GB201917837A GB2589629A GB 2589629 A GB2589629 A GB 2589629A GB 201917837 A GB201917837 A GB 201917837A GB 2589629 A GB2589629 A GB 2589629A
- Authority
- GB
- United Kingdom
- Prior art keywords
- riveting
- circuit board
- printed circuit
- carrier
- pins
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
- F16B43/02—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts with special provisions for engaging surfaces which are not perpendicular to a bolt axis or do not surround the bolt
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
- F16B5/045—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting without the use of separate rivets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
-
- 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
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
- H05K5/0047—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
- H05K5/006—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by features for holding the PCB within the housing
-
- 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
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
An assembly includes a printed circuit board (2) securable on a carrier (1). The printed circuit board (2) has a plurality holes adapted to engage riveting pins (3) protruding from the carrier (1), the number and positions of the holes on the printed circuit board (2) corresponding to the number and positions of the riveting pins (3) on the carrier (1). The assembly further comprises a shim (4) corresponding with each hole and riveting pin (3), each riveting shim (4) being provided with a hollow cylindrical portion and a deformable collar portion (4b). A rim (4c) is provided at an outward edge of the collar portion (4b) such that the rim does not contact the printed circuit board (2), in use.
Description
Description
Assembly securing a printed circuit board, and assembling process therefor The present invention relates to an assembly securing a printed circuit board, and an assembling process therefor.
Usually, electronic components such as the sensors used in the automotive industry are contained in a metallic housing or carrier upon which a printed circuit board is secured by carrier pins subject to a riveting process. When applying the riveting process, the carrier pins (made of aluminum) are deformed directly over the printed circuit board material (which is more fragile than aluminum) and this could result in damaging the printed circuit board. There were designed also solutions were the securing screws or pins are eliminated, like for example the inventions disclosed in DE102007015938A1, W02011053023A2 or W02018069340A1. Nevertheless, such securing assemblies are subject to improvement.
For these reasons, the technical problem to be solved is to lower the mechanical stress on the printed circuit board and to design a more stable assembling process.
Therefore, the object of the invention is to solve the deficiencies of the mentioned prior art and to provide an assembly able to remove any chance of damaging the printed circuit board.
This objective is achieved according to the invention by means of the technical characteristics mentioned in the independent claims, namely an assembly securing a printed circuit board and an assembling process therefor.
Further advantageous embodiments are the subject matter of the dependent claims.
A first subject-matter of the present invention is an assembly 5 of securing a printed circuit board, the printed circuit board having multiple holes adapted to engage riveting pins protruding from the carrier, the number and positions of the holes on the printed circuit board corresponding to the number and positions of the riveting pins on the carrier, wherein for each riveting 10 pin a shim is provided, each shim having a hollow cylindrical portion and a deformable collar portion with a raised rim.
The main advantages of using an assembly according to invention is that the softer or breakable material of the printed circuit board is protected; the shim realizes also the ground connection for the printed circuit board; the gap between the hole in the printed circuit board and the shim is smaller and easier to control; a better positioning of the printed circuit board is obtained.
A second subject-matter of the present invention is an assembling process for securing a printed circuit board, the printed circuit board having multiple holes adapted to engage riveting pins protruding from the carrier, the number and positions of the holes on the printed circuit board corresponding to the number and positions of the riveting pins on the carrier, comprising the steps of: a) placing the printed circuit board over the carrier and passing the riveting pins through the holes; b) introducing shims into the holes of the printed circuit board and engaging riveting pins, the number of the shims corresponding to the number of the riveting pins, wherein a shim is provided with a hollow cylindrical portion and a deformable collar portion with a raised rim; c) riveting the riveting pins and deforming the extended collar portion of the riveting shims in axial-radial direction by a riveting punch and producing riveted connections.
The advantage is that the assembling process is cheaper in terms of parts and steps.
Further special features and advantages of the present invention can be taken from the following description of an advantageous 10 embodiment by way of the accompanying drawings.
Fig. 1 is a schematic view of a prior art carrier;
Fig. 2 is a isometric view of an assembly of securing a printed circuit board, before riveting; Fig. 3 is a sectional view of the assembly according to invention, before riveting; Fig. 4 is a sectional view of the assembly before riveting; Fig. 5 is a detailed view of a section X from Fig. 4; Fig. 6 is a sectional view of the assembly after riveting; Fig. 7 is a detailed view of a section X from Fig. 6.
Referring now to Fig. 1, it is illustrated a carrier 1 from prior art. The carrier is a support for an electronic component, for example a sensor, or even more specific, a radar sensor. Aprinted circuit board 2 usually having a square shape is provided with holes (not referenced) symmetrically placed at extremities (for example, in the corners of the printed circuit board, like it is shown in Fig. 1). The carrier 1 is provided with protruding pins 3 (represented here unriveted yet) engaged in the corresponding holes on the printed circuit board; a riveting operation is applied upon the pins 3, directly over the printed circuit board, meaning that the pin is flattened and extended over a riveting area A around the hole of the printed circuit board, and fastens the printed circuit board underneath. Since the material used for carrier is usually aluminum and the substrate used for printed circuit boards is a reinforced fiberglass epoxy resin, the concerns regarding the potential damages caused by a riveting operation applied directly over the printed circuit board are justified.
Fig. 2 shows an exemplary embodiment of this invention: in order to protect the printed circuit board at least on the riveting areas, a shim 4 is added.
Fig. 3 shows a sectional view through such an assembly according to invention, before applying the riveting operation. A printed circuit board 2 with a height h is provided with holes (not referenced) adapted to receive pins 3 protruding from a carrier 1, the number of the pins on the carrier corresponding to the number of the holes on the printed circuit board, as well as their respective positions, so that by passing the pins through the holes, the printed circuit board 2 is engaged and fitted on the carrier 1. Each hole in the printed circuit board 2 is adapted to receive an unriveted pin 3 and allows a gap g that accommodates a shim 4.
Fig. 4 is an enlarged sectional view that shows how the shim 4 encircles the unriveted pin 3, being supported by the carrier 1 and still allowing a gap. Also, it shows that the shim 4 comprises a hollow cylindrical portion 4a extending into a deformable collar portion 4b.
Fig. 5 shows an even more detailed view of a section X from Fig. 30 4, where is visible a raised rim 4c of the collar portion 4b; before riveting, the raised rim 40 does not contact the surface of printed circuit board 2.
Fig. 6 shows a sectional view of the assembly after riveting. The pin 3, riveted at this moment, is flattened and extends over the collar portion 4b of the shim. At this moment, the shim 4 exerts axial and radial forces on the printed circuit board 2, forces by means of which the carrier 1 and the printed circuit board 2 are fixed together.
Fig. 7 shows an enlarged view of a section X from Fig. 6, where is visible that the raised rim 4c contacts the printed circuit board 2, but the area underneath the collar portion 4b prevents a direct contact between the riveted pin 3 and the printed circuit board 2. By this arrangement, a lower stress is exercised on the printed circuit board.
In order to obtain such an assembly, an assembling process is applied, comprising the steps of: a) placing the printed circuit board over the carrier and passing the riveting pins through the holes; b) introducing riveting shims into the holes of the printed 20 circuit board and engaging river_ing pins, wherein a riveting shim is provided with a hollow cylindrical portion and a deformable collar portion with a raised rim; c) riveting the riveting pins and deforming the extended collar portion of the riveting shims in axial-radial direction by a 25 riveting punch and producing riveted connections.
However, while certain embodiments of the present invention have been described in detail, those familiar with the art to which this invention relates will recognize various alternative designs and embodiments for practicing the invention as defined by the following claims.
List of reference numbers A Riveting area 1 Carrier 2 Printed circuit board 3 Riveting pin 4 Shim 4a Hollow cylindrical portion of a shim 4b Collar portion of a shim 4c Raised rim of a shim
Claims (3)
- Patent claims 1. Assembly for securing a printed circuit board on a carrier, the printed circuit board having multiple holes adapted to engage 5 riveting pins protruding from the carrier, the number and positions of the holes on the printed circuit board corresponding to the number and positions of the riveting pins on the carrier, wherein for each riveting pin a shim is provided, each shim having a hollow cylindrical portion and a deformable collar portion with 10 a raised rim.
- 2. Assembly according to claim 1, wherein the shim is made of sheet metal.
- 3. Assembling process for securing a printed circuit board on a carrier, the printed circuit board having multiple holes adapted to engage riveting pins protruding from the carrier, the number and positions of the holes on the printed circuit board corresponding to the number and positions of the riveting pins on the carrier, comprising the steps of: a) placing the printed circuit board over the carrier and passing the riveting pins through the holes; b) introducing riveting shims into the holes of the printed circuit board and engaging riveting pins, the number of the riveting shims corresponding to the number of the riveting pins, wherein a riveting shim is provided with a hollow cylindrical portion and a deformable collar portion with a raised rim; c) riveting the riveting pins and deforming the extended collar portion of the riveting shims in axial-radial direction by a 30 riveting punch and producing riveted connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1917837.5A GB2589629B (en) | 2019-12-05 | 2019-12-05 | Assembly securing a printed circuit board, and assembling process therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1917837.5A GB2589629B (en) | 2019-12-05 | 2019-12-05 | Assembly securing a printed circuit board, and assembling process therefor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201917837D0 GB201917837D0 (en) | 2020-01-22 |
| GB2589629A true GB2589629A (en) | 2021-06-09 |
| GB2589629B GB2589629B (en) | 2021-11-24 |
Family
ID=69171888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1917837.5A Active GB2589629B (en) | 2019-12-05 | 2019-12-05 | Assembly securing a printed circuit board, and assembling process therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2589629B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2275315A (en) * | 1939-01-12 | 1942-03-03 | Ray Reginald John | Means for attaching fragile bodies to a support |
| WO2013153008A1 (en) * | 2012-04-10 | 2013-10-17 | Osram Gmbh | Fastening arrangement for fastening a housing of an led module |
-
2019
- 2019-12-05 GB GB1917837.5A patent/GB2589629B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2275315A (en) * | 1939-01-12 | 1942-03-03 | Ray Reginald John | Means for attaching fragile bodies to a support |
| WO2013153008A1 (en) * | 2012-04-10 | 2013-10-17 | Osram Gmbh | Fastening arrangement for fastening a housing of an led module |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2589629B (en) | 2021-11-24 |
| GB201917837D0 (en) | 2020-01-22 |
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