• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    11 ABSTRACT The present invention relates to an electrical unit (1) comprising ahousing (5) having a first wall (7) and a circuit board (3) mounted inside saidhousing (5), wherein an inner side (7a) of said first wall (7) is provided with amounting arrangement (17) for holding an electrical component (45). An outer side (7b) of said first wall (7) is provided with a disassemblingmarking (53, 55, 57) which corresponds to an outer boundary (65, 67, 69) of amounting arrangement foundation (39, 41, 43). Elected for publication: Figure 1b.
    公开号:SE1451604A1
    申请号:SE1451604
    申请日:2014-12-19
    公开日:2016-06-20
    发明作者:HUGAUD Pascal；MAUGER Thomas
    申请人:Autoliv Dev；
    IPC主号:
    专利说明:

    ELECTRICAL UNIT Technical Field of the lnvention The present invention relates to an electrical unit comprising a housinghaving a first wall and a circuit board mounted inside said housing, whereinan inner side of said first wall is provided with a mounting arrangement for holding an electric component.
    Background Artln several technical fields, for instance in the control of electrical system on board a motor vehicle, it is desirable to provide a sealed non-conductive (e.g. plastic) housing containing a printed circuit board, onto whichare mounted several electrical components.An electrical unit of this type is disclosed in WO 2013/006103.
    However, inspection of such an electrical unit after it has been assembledmay be considered complicated.
    Summary of the lnvention lt is an object of the present invention to provide an improved electricalunit which enables easy inspection of the electrical components thereof.
    This and other objects that will be apparent from the followingsummary and description are achieved by an electrical unit according to theappended claims.
    According to an aspect of the present invention, there is provided anelectrical unit comprising a housing having a first wall and a circuit boardmounted inside said housing, wherein an inner side of said first wall isprovided with a mounting arrangement for holding an electrical component,and wherein an outer side of said first wall is provided with a disassemblingmarking which corresponds to an outer boundary of a mounting arrangementfoundation.
    After assembling an electrical unit it may form a sealed unit. lt may bedifficult to open an assembled unit for inspection purposes without destroying the electrical circuit thereof, since the electrical component holded by themounting arrangement is connected to the printed circuit board. lnspectionmay be needed in different situations, e.g. in conjunction with inspection, aftera crash event, of an electrical unit that is fitted into a motor vehicle. ln order toallow such inspection a wall of the housing is preferably separated from theother parts of the housing. Separating a wall, which is provided with amounting arrangement for an electrical component, from the electricalcomponent by pulling it away therefrom may damage components of theelectrical unit and/or the electrical circuit thereof.
    The first wall of an electrical unit according to the present disclosuremay be released in a controlled manner by destroying the retaining function ofthe mounting arrangement. The disassembling marking indicates where, onthe inside of the wall, a foundation of the mounting arrangement is located,and forms a cutting pattern indicating where to cut in order to destroy theretaining function of the mounting arrangement. The disassembling markingthus enables the mounting arrangement to be loosened and the electrical unitto be opened in a controlled and reliable manner without destroying theelectrical circuit thereof. The retaining function of the mounting arrangementmay, e.g., be destroyed by cutting along a cutting pattern formed by thedissambling marking.
    According to one embodiment said mounting arrangement comprisesat least one pair of clips projecting from the inner side of said first wall.
    According to one embodiment said mounting arrangement comprisesat least one resilient clip.
    According to one embodiment said disassembling marking comprisesat least one recess formed in said first wall.
    According to one embodiment said disassembling marking comprises aprotrusion projecting from the inner side of said first wall.
    According to one embodiment said disassembling marking comprises aline, such as a printed or painted line.
    According to one embodiment said first wall is a cover of said housing.
    According to one embodiment said first wall is made of plastic and theother parts of the housing are made of metal, which provides for a robusthousing that blocks electromagnetic radiation.
    According to one embodiment said housing is made of plastic.
    According to one embodiment said mounting arrangement is formedintegrally with said first wall.
    According to another aspect of the present disclosure, there isprovided a method of opening an electrical unit, the electrical unit comprises ahousing having a first wall and a circuit board mounted inside said housing,wherein an inner side of said first wall is provided with a mountingarrangement for holding an electrical component, the method comprisingcutting along a cutting pattern arranged on the outer side of said first wall andcorresponding to an outer boundary of a mounting arrangement foundation,until the retaining function of said mounting arrangement is destroyed, andremoving said first wall to allow inspection of at least one electricalcomponent of the electrical unit.
    The cutting marking indicates where the mounting arrangement islocated on the inside of the wall and thus where to cut in order to destroy theretaining function of the mounting arrangement. After destroying the retaingfunction of the mounting arrangement the wall may easily be removed toenable inspection of the electrical unit. This method allows inspection of theelectrical circuit of the electrical unit to be carried out in a controlled andreliable manner without destroying components and/or the electrical circuitthereof.
    According to one embodiment, the cutting is carried out by cuttingalong a cutting pattern defined by an outer boundary of a recess formed insaid first wall. The cutting may thus be carried out under the guidance of an outer boundary of a recess formed on the outer side of said first wall.
    These and other aspects of the invention will be apparent from andelucidated with reference to the claims and the embodiments describedhereinafter.
    Brief Description of the Drawinqs The invention will hereafter be described in more detail and withreference to the appended schematic drawings.
    Fig. 1a is a perspective view of an electrical unit according to anembodiment of the present disclosure about to be assembled.
    Fig. 1b is a perspective view of an electrical unit according to anembodiment of the present disclosure in an assembled state.
    Figs. 2a-b are perspective views illustrating opening of the electronicunit shown in Fig. 1.
    Fig. 3a is a perspective view of a cover and an electrical component ofthe electrical unit shown in Fig. 2a.
    Fig. 3b is a perspective view illustrating the cover shown in Fig. 3aafter a cutting operation.
    Detailed Description of Preferred Embodiments of the lnventionFigs. 1a and 1b illustrate an electronic unit 1 according to anembodiment of the present disclosure. The electronical unit 1 comprises aprinted circuit board (PCB) 3 and a housing 5. The electronical unit 1 may bea part of a control system in a motor vehicle. The PCB 3 is of an ordinarykind, comprising conductive tracks and component connections. The PCB 3may have one or several conductive layers, where some layers may compriseconductive tracks and some layers may comprise ground planes.The housing 5 comprises a first wall, in the form of a cover 7, and fivefurther walls in the form of four side walls 9, 11, 13, 15 and one bottom wall.The inner side 7a of the cover 7 is provided with a mounting arrangement 17 comprising three pairs of clips 19, 21, 23. Each pair of clips19, 21, 23 comprises a first 25, 27, 29 and a second clip 31, 33, 35,respectively, projecting from the inner side 7a of the cover 7. Each clip in apair of clips comprises a foundation, i.e. a base portion, and a substantiallyrectangular body, which is arranged to be generally perpendicular to the innersurface of the cover 7, and each of the clips in a pair of clips has a protrudinglip 37 at or near the free end thereof, which protrudes towards the other oneof the pair of clips. Hence, as illustrated in Fig. 3a, the first clip 25 of the firstpair of clip 19 comprises a foundation 39, the first clip 27 of the second pair ofclips 21 comprises a foundation 41 and the first clip 29 of the third pair of clips 23 comprises a foundation 43. The clips 25, 27, 29, 31, 33, 35 of themounting arrangement 17 are preferably formed from a sturdy, resilient, non-conductive material, such as, e.g, plastic, and may be formed integrally withthe cover 7.
    The electrical unit 1 further comprises a capacitor 45 having a relativelylarge, substantially cylindrical body 47 and two electrically contact pins 49, 51protruding therefrom.
    The mounting arrangement 17, which comprises the three pairs of clips19, 21, 23, is adapted to receive and retain the capacitor 45. The dimensionsand spacing between the three pairs of clips 17, 19, 21 are such that the body47 of the capacitor 45 may be pushed between them, contacing the lips 37thereof so that, upon assembly of the electrical unit 1, the clip pair aredeflected and forced apart, and then allowed to return to their initial positionsonce the body 47 of the capacitor 45 has been pushed past the lips 37. Thecapacitor 45 is then held in place being trapped between the inner surface ofthe cover 7 and the clips 19, 21, 23, and being prevented from becomingdetached from the mounting arrangement 17 by the protruding lips 37 of theclips 25, 27, 29, 31, 33, 35 thereof. ln Figs. 1a.b and Figs. 2a-b parts of two 9, 11 of the side walls 9, 11,13, 15 of the housing 5 has been removed to visualize the inside of thehousing 5.
    The PCB 3 may be conventional, comprising a substrate of asemiconductor material, having electrical components mounted thereto, withconductive tracks being provided on one or both major surfaces of the PCB toconnect the components to one another.
    The outer side 7b of the cover 7 is provided with three disassemblingmarkings in the form of recesses 53, 55, 57. Each disassembling marking 53,55, 57 corresponds to an outer clip foundation boundary 65, 67, 69,respectively. Hence, the periphery 59, 61, 63, i.e the outer boundary, of eachdisassembling marking 53, 55, 57, respectively, corresponds to a respectiveclip foundation boundary 65, 67, 69, illustrated in Fig. 3a. Hence, the firstdisassembling marking 53 corresponds to the first clip foundation periphery65, the second disassembling marking 55 corresonds to the second clip foundation periphery 67 and the third disassembling marking 57 correspondsto the third clip foundation periphery 69.
    Each disassembling marking 53, 55, 57 thus indicates where a clip ofthe mounting arrangement 17 is located on the inner side 7a of the cover 7.
    Furthermore, each disassembling marking 53, 55, 57 forms a cuttingpattern 59, 61, 63, respectively, indicating where to cut in order to destroy theretaining function of retaining clips.
    Upon assembly of the electrical unit 1 the cover 7 is pushed onto thecapacitor 45, as illustrated by arrow A in Fig. 1a. Then, the cover 7 is placedon the side walls 9, 11, 13, 15. When the electrical unit 1 is assembled, theside walls 9, 11, 13, 15 and the cover 7 form a sealed unit together with thebottom wall of the housing 5.
    After assembly of the electrical unit 1 the cover 7 is attached to thecapacitor 45 and side walls 9, 11, 13, 15 in a robust manner. Then, in casethe assembled electrical unit need to be inspected, the disassemblingmarkings enables opening of the assembled electrical unit.
    The cover 7 may be released from the capacitor 45 by destroying theretaining function of the mounting arrangement 17. The retaining function of apair of clips of the mounting arrangement 17 may be destroyed by a cuttingoperation from the outside of the cover 7. The cutting patterns 59, 61, 63formed by the disassembling markings 53, 55, 57 serve to facilitate such anoperation by indicating where one clip 25, 27, 29 of each pair of clips 19, 21,23, respectively, are located on the inner side 7a of the cover 7, and, hence,where to cut in order to loose these clips 25, 27, 29. After such a cuttingoperation the cover 7 may easily be released from the capacitor 45 andremoved therefrom, which enables inspection of the electronic circuit of theelectrical unit 1. The cutting patterns 59, 61, 63 thus enables the electricalunit 1 to be opened without destroying the electrical circuit thereof.
    With reference to Figs. 2a-b opening of the electrical unit 1 will bedescribed hereinafter. Fig. 3a shows the cover 7 and capacitor 45 of theassembled electrical unit 1 shown in Fig. 1b. ln a first step, a cutting operation is carried out to release the cover 7from its connection to the capacitor 45. The cutting operation involves cutting along cutting patterns 59, 61, 63, illustrated in Fig. 1a, on the outer side 7b ofthe cover 7. Each cutting pattern 59, 61, 63 corresponds to a respective clipfoundation boundary on the inner side 7a of the cover 7, as describedhereinbefore. Cutting is carried out until the retaining function of the mountingarrangement 17 is destroyed, i.e. until one clip of each pair of clips is releasedfrom the cover 7, as schematically illustrated by arrow B in Fig. 2a. lt isrealized that such a cutting operation may be carried out in many differentways. For instance, the cutting operation may involve drilling and/or milling.The cover 7 is thus released from its connection to the capacitor 45 bydestruction of one retaining clip of each pair of clips of the mountingarrangement 17. ln a second step, the cover 7 is separated from the sidewalls 9, 11, 13,15 of the housing 5, as illustrated by arrow C in Fig. 2b. ln the second step,the cover 7 is thus removed from the other parts of the housing 5. Then,inspection of the electrical circuit inside the housing 5 is enabled. ln conjunction with the cutting operation, three through holes 71, 73,75, illustrated in Fig. 3b, are formed in the cover 7.
    Hence, a method of opening an electrical unit 1 of the type describedhereinbefore with reference to Figs. 1a-b comprises cutting along at least onecutting pattern 59, 61, 63 arranged on the outer side 7b of a first wall 7 of thehousing 5 and corresponding to an outer boundary of a mountingarrangement foundation 39, 41, 43, until the retaining function of the mountingarrangement 17 is destroyed, and removing said first wall 7 to allowinspection of at least one electrical component 45 of the electrical unit 1. lt is realized by a person skilled in the art that features from variousembodiments disclosed herein may be combined with one another in order toprovide further alternative embodiments.
    As described hereinbefore with reference to Figs. 1a-b, the electricalunit of the present disclosure comprises a first wall in the form of a cover 7. ltis however appreciated that the first wall may be any of the walls of thehousing. For instance, the first wall may be a bottom wall of the housing.
    As described hereinbefore with reference to Figs. 1a-b, an outer side ofthe cover 7 is provided with disassembling markings in the form of recesses. lt is however realized that a disassembling marking of the electrical unit maybe in the form of a protrusion or a line, such as a printed or painted line.
    权利要求:
    Claims (11)
    [1] 1. Electrical unit (1) comprising a housing (5) having a first wall (7) and a circuit board (3) mounted inside said housing (5), wherein an inner side (7a) of said first wall (7) is provided with amounting arrangement (17) for holding an electrical component (45), characterized in that an outer side (7b) of said first wall (7) is provided with adisassembling marking (53, 55, 57) which corresponds to an outer boundary(65, 67, 69) of a mounting arrangement foundation (39, 41, 43).
    [2] 2. Electrical unit (1) according to claim 1, wherein said mounting arrangement(17) comprises at least one pair (19, 21, 23) of clips (25, 27, 29, 32, 33, 35)projecting from the inner side (7a) of said first wall (7).
    [3] 3. Electrical unit (1) according to any of the preceding claims, wherein saidmounting arrangement (17) comprises at least one resilient clip (25, 27, 29,32, 33, 35).
    [4] 4. Electrical unit (1) according to any of the preceding claims, wherein saiddisassembling marking comprises at least one recess (53, 55, 57) formed insaid first wall (7).
    [5] 5. Electrical unit according to any of the preceding claims, wherein saiddisassembling marking comprises a protrusion projecting from the inner sideof said first wall.
    [6] 6. Electrical unit according to any of the preceding claims, wherein said firstwall is a cover (7) of said housing (5).
    [7] 7. Electrical unit according to any of the preceding claims, wherein said firstwall (7) is made of plastic and the other parts (9, 11, 13, 15) of the housing (5)are made of metal.
    [8] 8. Electrical unit (1) according to any of the preceding claims, wherein saidhousing (5) is made of plastic.
    [9] 9. Electrical unit (1) according to any of the preceding claims, wherein saidmounting arrangement (17) is formed integrally with said first wall (7).
    [10] 10. Method of opening an electrical unit (1), the electrical unit (1) comprises ahousing (5) having a first wall (7) and a circuit board (3) mounted inside saidhousing (5), wherein an inner side (7a) of said first wall (7) is provided with amounting arrangement (17) for holding an electrical component (45),the method being characterized in comprising: cutting along a cutting pattern (59, 61, 63) arranged on the outer side(7b) of said first wall (7) and corresponding to an outer boundary (65, 67, 69)of a mounting arrangement foundation (39, 41, 43), until the retaining functionof said mounting arrangement (17) is destroyed, and removing said first wall (7) to allow inspection of at least one electricalcomponent (45) of the electrical unit (1 ).
    [11] 11. Method according to claim 10, wherein the cutting is carried out by cuttingalong a cutting pattern defined by an outer boundary (59, 61, 63) of a recess(53, 55, 57) formed in said first wall (7).
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    同族专利:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1451604A|SE538701C2|2014-12-19|2014-12-19|Electrical unit|SE1451604A| SE538701C2|2014-12-19|2014-12-19|Electrical unit|
    CN201580069159.1A| CN107113989B|2014-12-19|2015-12-15|Electronic unit|
    PCT/EP2015/079837| WO2016096882A1|2014-12-19|2015-12-15|Electrical unit|
    US15/537,681| US10257947B2|2014-12-19|2015-12-15|Housing for electrical unit|
    EP15817789.9A| EP3235356B1|2014-12-19|2015-12-15|Electrical unit|
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