Abstract: An ultrasonic transducer having a pot-like casing has an outer bottom face which is designed in part as a vibrating diaphragm. A stabilizing ring is arranged on the outside of the wall of the pot-like casing, imparting a greater rigidity to the casing and limiting the ultrasonic vibration essentially to the bottom of the pot as a vibrating diaphragm. The propagation and reception beams of the ultrasonic waves can be shaped further by an additional arrangement of a sound directing device in the area of the vibrating diaphragm.

Abstract: An ultrasonic transducer has a pot-like housing with an annular wall and with a bottom surface serving as diaphragm. A piezo-element which is connected with connection lines is arranged at the inner side of the bottom surface. The edge remote of the bottom surface is surrounded by a decoupling ring which is formed as a holder for the connection lines.

Abstract: An arrangement having a module for installation in a bumper of a motor vehicle and having a retaining part for attaching the module to the bumper. The retaining part, in this context, is fixedly attached on the interior side of the bumper blade, so that the module can be inserted from the interior side. Provision is made in the bumper for a corresponding bore, through which the head piece of the module can be plugged in until the surface is roughly flush with the exterior surface of the bumper. As the module, an ultrasonic sensor is preferably proposed, which can be used for measuring distance in a motor vehicle. Since only the head piece of the module is visible from the outside but not its attachment parts, the resulting appearance is particularly advantageous since it is not disruptive from a design point of view.

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: In a control device the printed circuit board (10) rests on a rim (28) of the housing bottom (26). The power components (14) to be cooled are arranged in the area where the printed circuit board (10) rests on the rim (28). In order to achieve an even contact pressure of the printed circuit board (10) over the entire support surface, a contact pressure on the power component (14) or on the printed circuit board (10) is generated with the help of additional aids. It is possible here to use spring elements (30) or elastomer strips (31) acting on the power component (14). Furthermore, multi-part support elements (40), or respectively plastic elements (45) can also be employed, which respectively act directly on the printed circuit board (10). A good heat dissipation from the power component (14) via the rim (28) of the housing bottom is possible by means of this.

Abstract: A control device has at least two housing parts, at least one printed circuit board provided with power components and fastened in a peripheral region between the housing parts, the printed circuit board having a layer of a thermally conductive material, the housing parts of the printed circuit board having a first housing part and a second housing part formed so that the first housing part has a bearing face on the at least one printed circuit board which is larger at least in a region of the power components than a bearing face of to the second housing part, the layer being a filler which has good heat conduction and adhesion to the printed circuit board and to the first housing part.

Abstract: A device, in particular for use in an electronic controller, includes a card rack and a subassembly. The device is manufactured by soldering over a large area the unpopulated back side of the subassembly to this card rack. The soldering can be performed using a reflow soldering process and can be automated, and thus suitable for mass production. The electrical connections of the subassembly are led spatially and electrically separately from the mechanical attachment of the subassembly to the card rack. The subassembly can be an additional component mounted on the card rack with a new additional function, so that the controller can be flexibly adapted to a given requirement profile in a simple manner by combining, in a flexible manner, a plurality of subassemblies with different layouts and modes of operation on the card rack.

Abstract: The housing (10) of an electrical device, in particular a switching and control device for motor vehicles, includes an upper shell (11) and a lower shell (12), and PC boards (15, 25) are located in both shells (11, 12). The required power components (17) are distributed to both PC boards (15, 25). The lower shell (11) of the housing (10) has side walls (16) encompassing three sides. The upper shell (11) has, in addition to the outer rim (21) extending around three sides, a protrusion (22) protruding into the housing on two opposed sides, so that a space (23) is created between the rim (21) and the extension (22). In the assembled state, the side wall (16) protrudes into the space (23) in the other shell (12). The power components (17) rest on the inner wall of the side wall (16) or of the extensions (22), so that the lost heat can be dissipated in a simple way.

Abstract: In order to provide protection against disruptive radiation and achieve good conduction of heat, a housing for control devices which has multiple parts is provided with a printed circuit board carrying power components and control elements with a peripherally extending lining of electrically and thermally conducting material. The printed circuit board is clamped between the housing halves in the region of the linings. The power components are contacted by the lining so as to be thermally conducting, while control elements which give off intensive disruptive radiation or are sensitive to such radiation are enclosed within connecting pieces projecting from the walls of the housing parts.

Abstract: The electric device has a printed circuit board (10) which carries an electronic circuit with electronic components (12). The circuit is provided with a plug connector strip (14) for making electrical contact. In addition to the housing cover (27) and housing base (32), additional plastic coverings (16, 23) which are tight against moisture are provided to protect the circuit against moisture in a reliable manner and cover the printed circuit board on the upper side (11) and the underside (22) in the manner of a hood. These plastic parts are connected with the printed circuit board so as to be tight against moisture. The housing cover (27) and housing base (30) need not carry out any sealing functions and serve exclusively to protect against mechanical damage and, under certain circumstances, for shielding.

Abstract: In an electrical switching or control unit, several components are arranged, sealed, within a housing (24). A plug body (10) is accommodated in an aperture (14) of a collar-like front plate (13) which itself is fixed to the edge of the housing (24). The connection between the plug body (10) and the front plate (13) is made by an locking cam (21) which is inserted in grooves (18, 19) which are opposite each other in the front plate (13) and the plug body (10) and which is fixed in its position by the housing (24).

Abstract: The housing for an electronic circuit is box-shaped, and on each of its longitudinal sides in its interior has a shoulder (44, 45), and above each of those a ridge (47, 48) and -- extending along a longitudinal side. A cooling frame (11) is pushed into the grooves (52, 53) formed between shoulder and ridge, with a printed circuit board (10) being fixed to the underside of the cooling frame. In its interior, the cooling frame has cooling tabs (15, 16, 17) which stand perpendicular to the surface of the printed circuit board and on which power components (20) are fixed.

Abstract: The housing for an electronic circuit provided with a connection plug, particularly for control device electronics of an internal combustion engine of a vehicle, includes a cooling frame to which a printed circuit board having the electronic circuit is fastened and which has at least one cooling portion with which power components connected to the printed circuit board are connected so as to conduct heat, and also includes a cover enclosing the printed circuit board. For a simple construction, it is suggested that the cooling frame (5) be constructed as a flat frame (6) with flat frame legs (8, 8a, 8b, 8c, 8d) substantially parallel to the plane (7) of the printed circuit board (3), the housing cover pieces (12, 13) forming the cover (11) being arranged at the upper and lower sides (9, 10) of the flat frame (6).

Abstract: A spring element, for securing components of an electronic control device, is essentially U-shaped, with a bridge portion (16), which rests on an end (11A) of a cooling fin (11) mounted perpendicularly on a printed circuit board (13), and a pair of depending spring legs (17, 18), one of which presses against a side face (11C) of the cooling fin (11) and the other of which presses a power component (14) against a major surface (11B) of the cooling fin (11). Preferably, the spring element (15, 15A) is formed with a pair of slots (23, 24) which facilitate engagement by a pair of tongs (25, 26) of an automatic mounting device. The tongs can spread open the spring element and position it around the cooling fin (11) and power component (14) without exerting any harmful shear forces on the fin or component. Preferably, each spring leg has a convex central section, below the slot, and a concave bottom or terminal end.

Abstract: A housing for an electronic circuit, especially for a control electronic device of a motor vehicle, has a printed circuit board adapted to carry an electronic circuit, a plug strip, a front plate, a cooling frame mounted on the board and having at least one cooling portion, power elements connected with the cooling portion in a heat conductive manner. The front plate is provided with cooling ribs and the cooling frame is provided with at least one cooling leg facing toward the plug strip so that the plug strip is located between the front plate with the cooling ribs and the cooling leg of the cooling frame. The front plate and the cooling frame are connected through a heat conducting web on the front plate in a heat conducting manner.

Abstract: The housing for an electronic circuit provided with a connection plug, particularly for control electronics of an internal combustion engine of a vehicle, includes a frame, to which a printed circuit board having the electronic circuit is fastened, and a heat sink, the power components of the electronic circuit being positionally adjacent the heat sink so as to be able to transfer heat to the heat sink during operation of the electronic circuit board. The frame is constructed as an injection molded plastic frame (2) with a heat sink (14) including at least one built-in heat conducting crosspiece (13) having one end (15) and another end (17). The one end (15) has a component assembly surface (16) located in the housing interior and the other end (17) is constructed as a heat removing element (18) extending from the frame (2) toward the exterior (FIGS. 1 and 2). The power components are located next to the component assembly surface (16).

Abstract: A servocylinder (1, 3, 4) with an electric piston end position transmitter is suggested. It is constructed as a piezoelectric converter (17 and 18). By means of applying voltage to the piezoelectric converter (17 and 18) the latter becomes a regulating element which overcomes a force holding the piston (2) in its stroke end position and removes the piston (2) from its position in which the feed line (7 and 8) of the pressure medium is sealed.

Abstract: A piezoelectric control block, particularly for controlling a fuel injection device for a combustion engine, preferably diesel engine, with a distributor injecting pipe, has an adjustable fuel quantity adjusting member, and a longitudinally extending mechanical movement converter which is formed so that under longitudinal load it deforms transversely to its longitudinal expansion and has a part which performs an overproportional movement under the longitudinal load and is connected with the feed quantity adjusting member.

Abstract: A piezoelectric device for measuring the pressure of a gas like medium comprises two oscillators disposed opposite to each other in a substantially closed system by intermediate introduction of the gas to be measured. The measuring is performed by defining a transfer factor from the first piezoelectric oscillator to the second piezoelectric oscillator, whereby the first piezoelectric oscillator is definitely excited and the measuring signal is picked up by the second piezoelectric oscillator.

Abstract: To determine if a pulsed beam system, typically an ultrasonic pulsed beam system, which is located externally of a motor vehicle is in operative condition, a transmitter (14) projects a beam to a fixed reflector (16) located on the vehicle, and one (19) of a group of timing stages (18; 19, 20, 21) evaluates the transit time to the reflector. If the transit time to the reflector is slightly less than a predetermined time interval (Tc), so that the threshold timing level (Tc) is passed, a first indication, for example a frequency at a first tone (f1), generated by an acoustic tone generator (30) is reproduced in a loudspeaker; if, then, an obstruction is sensed by the beam, and the distance between the transmitter (14) and the obstruction (17) which forms a reflecting object drops below a first predetermined distance represented by a time period (T2), a second one of the transit time stages responds, and, through logic gates (22-24, 28, 29) provides a second discrete output frequency (f2) in the loudspeaker.