Abstract:
The electrical unit has a printed circuit board (10) supporting the circuit, which includes a power component (11) which generates heat. In order to dissipate this heat from the power component, the power component rests on a heat conductive layer (13) which in turn is applied to the upper side (12) of the printed circuit board. This heat conductive layer further has a portion of the lid (18, 19) of the housing resting on it, which serves as a cooling area. Alternatively, the cooling area can be a free-standing cooling element. The heat transfer thus takes place via the heat conductive layer (13) to the cooling element (18, 19) so that the latter may be applied and formed independently of type and form of the power component.
Abstract:
The holder (1) for an electronic component (20), especially a hybrid module, is preferably a unitary plastic element having an elongated base plate (2) formed with openings (14) therein to permit insertion of terminal pins or lugs (21) projecting from the component therethrough. Two holder arms (30) project from the base plate, the holder arms having module support portions (3) and oppositely projecting posts (4). The posts fit into receiving openings (26, 27) of a printed circuit board, which receiving openings having a spacing (S) which is greater than the distance (D) between the posts so that, upon insertion of the posts in the openings the arms (30) will tilt towards each other, thus clamping a module, typically in card or board form, between the module support (3) of the arms. The holder can also form a transport holder for the module, by forming, for example, in the module a notch spaced from the upper edge, and engaging the notch (22) with a projecting rim (9) formed on the upper ends of the support portions (3) of the arms, the notch being so spaced that the terminal lugs or pins (21) then just fit into the openings (14) in the base plate, thereby protecting the pins against damage.
Abstract:
To provide for simplified and less expensive manufacture without extensive insulation of internal components of a control system with respect to the housing, particularly for electronic ignition and fuel injection control systems, digital and other automotive control electronic systems and the like, a housing (1) of insulating plastic material has a connecting portion (2, 3) integrally formed therewith, which further include, integrally formed therewith, holding and engagement catches and slits (13, 15, 17-23; 62, 69) for a printed circuit board (41) carrying electronic network elements (42) such as transistors, capacitors, resistors, in integrated circuit form, or as discrete elements; and further a cooling device (24, 25; 56; 64; 73) in heat-conductive relationship to a power stage (43; 54; 65; 74) to dissipate heat generated within the power stage, and to transfer the heat over a large area surface connection either to a structural component carrying the entire control unit and/or to a sheet metal cover (49) snapped and crimped over the plastic housing (1) and, in sealed relation, closing off the entire structural unit.
Abstract:
The invention relates to a pin (10) which can be electrically connected in a soldering-free manner to a printed circuit board, said pin comprising a punching sheet profile provided with a contact pin section (11) for a plug connector and/or a plug connector strip, a first securing section (12) for the plug connector and/or the plug connector strip, a connection section (13) and a second securing section (15) provided with a pressing-in area (16), which can be at least elastically shaped in a printed circuit board hole such that it can be adapted to the diameter of the hole. The pin (10) comprises a bearing profile (14, 18, 19) which is arranged in the punching plane and which is used for a pressing-in tool (24) and is angled away from the punching plane in a connecting section (13) thereof. An insertable and removable, after having been inserted, pressing-in tool is provided for the insertion of at least one pin
Abstract:
A method for the attachment of electrical components to circuit boards where the electrical components are enclosed by a housing and held in place by a retaining device. The method enables a smaller and more compact construction for switching devices. The connection of the electrical components with the housing enclosing them creates a additional point for the absorption of thermal and mechanical stresses in addition to the connection with the circuit board.
Abstract:
A built-on control device has a multicomponent housing (15) which is open on one side and is fitted onto the housing block (10) of a hydraulic unit. Arranged in the housing (16) of the built-on control device (15) is a printed circuit board (29) for an electronic circuit with a plurality of electronic components (33). The printed circuit board (29) comprises a plurality of rigid regions (30, 25), one rigid region being formed by the lid (25) of the housing (16). A looplike flexible region (36), which comprises only the conductor foil (31), is located between the two rigid regions (25, 30). In addition, the conductor foil (31) projects beyond the rigid region (30) of the printed circuit board (29) and in this region (28) it is placed in contact with the connection pins (27) of the loads (12) of the hydraulic unit. Since the contact is made directly with the conductor foil (31) in the flexible region of the printed circuit board (29), tolerances can be easily compensated so that contact can be made easily and thus the built-on control device on the housing block (10) can be manufactured easily.
Abstract:
To provide for shock and vibration resistance and ease of assembly, a housing is formed with an access opening closed off by a cover. A support plate, such as a printed circuit board for electronic components is inserted in the housing, and a resilient, springy cushioning body is interposed between the support plate and the inner wall of the housing, the opening of the housing being closed off by a cover plate through which attachment prongs project. The resilient springy body is preferably hydrophobic, and of closed cellular construction so that it will not act like a sponge but reject absorption of moisture.
Abstract:
To mount power semiconductor units at the exposed surfaces of a housing structure for electronic components such as, for example, transistorized ignitions, without the loss of heat sink and heat radiation effects, while still protecting the electronic components, a protective cover is placed over the electronic component and at least a portion of the housing end wall, the cover being so dimensioned that it offers little resistance to radiation of heat by the housing end wall; the cover may be a layer of paint or a plastic hood or cap having end walls fitting against the housing end wall which are spaced from the electronic component by a distance which is sufficient to permit the housing end wall to act as a heat sink. If paint is used, the semiconductor is preferably located in a depression formed in the housing end wall so that paint can accumulate at the edges of the semiconductor thus providing effective protection.
Abstract:
To protect electronic components located within a housing structure, or casing, which contains ventilation openings, against corrosion due to intrusion of water, for example being sprayed thereon upon cleaning of the area on which the structure is mounted, the housing is formed with an attachment surface having ventilation ducts formed therein which are generally Y-shaped having two branch ducts terminating at the outside of the housing in spaced position, and forming an angle with respect to each other, for example terminating at essentially right angled housing edges, and a third trunk duct connected to the interior of the housing, and branching off from the two branch ducts, so that water sprayed against the housing may run through the branch ducts, without impingement on a back wall, and ventilation is provided by additional movement of air through the trunk of the Y-shaped duct; the ducts are preferably mounted with respect to the housing in such a manner that any liquid which might accumulate within the housing structure, due to condensation, can drain off, that is, can flow out through one of the branch ducts by gravity.The present invention relates to a housing structure which is so constructed that it contains ventilating openings, and yet is resistant to intrusion by water, or other liquids which may be sprayed against the housing structure, or in the immediate vicinity, and more particularly to a housing structure for electronic apparatus, especially for electronic apparatus to be used in automotive vehicles.Electronic apparatus used in automotive vehicles is frequently mounted in the engine compartment; the apparatus is thus subjected to the rough environmental conditions of the motor vehicle itself. Frequently it is located at a position where it is accessible for testing or servicing, thus at a position which is not well protected. The electronic components within the housing may include various electronic elements such as semiconductors, capacitors, resistors, integrated circuits, and other electronic elements which are mounted on organic or inorganic carrier substrates, such as XXXP circuit boards, epoxy-glass fiber substrates or carriers, ceramic substrates, or the like. It is important that water and high atmospheric humidity be excluded from the interior of the housing, in order to prevent corrosion and to retain the high insulation resistances of the electronic elements as well as of the carrier plates themselves. Hermetically sealing the housing is one solution which, however, is expensive, leads to cooling difficulties, and is, in general, commercially not suitable.Ventilating the housing prevents establishment within the housing of peculiar climatic conditions within the housing itself. It has previously been proposed to include electronic apparatus in housings which are formed with ventilating ducts so constructed that they form a tortuous, or labyrinth path from the outside into the housing. Spray water used to clean surrounding areas may, however, penetrate into such apparatus through the ventilating path, even if the duct itself has various turns or changes of directions, particularly if a stream of water directly impinges on the ventilating duct. It is particularly difficult to prevent penetration of water into the housing if pressure of a water spray or stream directed against the housing or surrounding area is high, or if the spray time is comparatively long. This condition may obtain, for example, when pressure-cleaning the engine compartment of a motor vehicle.It is an object of the present invention to provide a housing structure for electronic apparatus, and an electronic apparatus, in general, which is so constructed that water will not penetrate thereinto even if a stream of water is directed against the ventilating opening itself.SUBJECT MATTER OF THE PRESENT INVENTIONBriefly, the ventilating duct is so constructed that, in the projection of the back side of the housing, it is essentially Y-shaped, with the two branches of the Y terminating at the edges of the housing to form a through-duct; the trunk of the Y is connected to the interior of the housing, that is, to an internal ventilating duct; the two branches of the Y terminate at different sides of the housing.The structure of the present invention, therefore, provides a through-duct for water which is directed against the ventilating opening of the housing, to prevent reflection, or ricochet effects of streams of water directed against any one of the ventilating openings, the trunk of the Y branching off at the direction which is preferably so located that any water penetrating therein will, automatically, drain off.In accordance with a feature of the invention, the branch ducts terminating at the edges of the housing have approximately the same size, or diameter, or diametrical area. The housing is so located on the branch ducts that they terminate at the lowest point of the housing, to provide for drainage of water by gravity. Additionally, and in accordance with a preferred feature, the trunk duct leading to the interior of the housing is formed with a constriction, that is, tapers, in funnel form, to a constricted point and then extends to an opening which is perpendicular to the direction of the trunk duct, the trunk duct enlarging, again, to enhance the funnel effect. The opening leading into the interior of the housing, preferably, is curved, for example formed as a circular segment.
Abstract:
A control device has a plurality of possible attachment places for receiving attachment elements at least one of the attachment places being formed as a blocking attachment place which prevents receiving of an attachment element.