Preh-werke Gmbh Co. Kg

Walter Voll

Karl-Heinz Bauer

Joachim Storath

Ulrich Brueggemann

An electrical rotary switch for several switch positions having a control knob mounted in a housing supported on first, second and third ball bearings that, guided by a cage disk, roll in a housing groove formed by an axial wall and a radial wall against which the ball bearings are loaded under an applied force of a conical bearing surface of the control knob. Axial and radial wall bearing surfaces respectively have first and second contact segments and first, second and third contact bands thereon that extend out of the housing via terminal lugs, the first contact segment and first contact band being shorted by the first ball bearing in predetermined switch positions. In a last switch position, contact occurs between the second contact segment (,) and the second and third contact bands (,) through the second and third ball bearings (,).

Electrical rotary switch

A control unit for adjusting heating, air conditioning, and/or ventilation equipment in motor vehicles has turning knobs (5, 6) and the cam wheels (13, 14) which are connected together. There are adjusting levers (10, 11, 12), with each being mounted by means of two bearing pins (15, 16) in a base part (3), and each adjusting arm (10, 11, 12) being structured as a two-armed lever with one lever arm (17, 18, 19) engaging in a three-dimensional cam plate (20, 21, 22) of the cam wheel (13, 14) in a swivel plane E. Between the lever arm (17, 18, 19) and the three-dimensional cam plate (20, 21, 22), a barrel-shaped or spherical follower element (23) is positioned that cooperates with radial motion-causing walls (24, 25) of the three-dimensional cam plate (20, 21, 22). A control unit of this invention is structured to be space saving, easier and less expensive to produce, and to function in an improved manner.

Control unit for adjusting heating, air conditioning and/or ventilation

A rotary switch has a control knob (3) that is mounted on at least three balls (6) that move, guided by a cage disk (7), in a housing groove (8) formed by a radial wall (9) and an axial wall (10), against which the balls (6) are urged by an outward or inward conical bearing surface (11) or (12). The radial and axial wall bearing surfaces have contact segments and contact paths (13, 14) that are shorted by at least one of the balls (6). The control knob has a stop lug (15), an operational adjustment angle (4) of which is limited by housing lugs (16) and which, during operational adjustment, contacts at least one of two stop lugs (17) of the cage disk, which are positioned at an angle that corresponds approximately to one-half the maximum operational adjustment angle (4) and to a maximum contact adjustment angle (5). This structure results in reduced cost and functional improvement.

An apparatus includes a plurality of control elements (3) on a dashboard (1) of a motor vehicle which are framed and covered by face plates (6) which are mounted after the control elements are mounted. Control element bodies of the control elements (3), are resiliently held relative to fixed attaching eyes (7), and spacings between control element bodies of individual control elements (3) and control element bodies and framing edges of the dashboard (1) are set by spacers (10) on the face plates (6). This arrangement achieves an uncomplicated mounting and a pleasing visual appearance.

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Sandberg, Germany

Walter Voll