Preh-werke Gmbh Co. Kg

Preh Gmbh

Joachim Storath

Karl-Heinz Bauer

Gerold Eckert

Walter Voll

Ulrich Brueggemann

Reinhold Moret

Thomas Ofenhitzer

Oliver Zegula

Klaus Mueller

Thilo Kirchner

An operational control is provided for setting an actuating variable, more particularly a set point for a motor vehicle air conditioner, having a rotary knob, having at least two contact tracks and one elastic wiper contact element that is in contact by means of at least one wiper contact with a contact track, wherein the contact tracks are joined to the rotary knob so as to be nonrotatable with respect thereto and in that the wiper contact elements are provided with an additional elastic wiper contact facing the printed circuit board.

Operational control having a spring wiper contact

A control element for control functions within a passenger area of a vehicle having several turning knobs whose positions are indicated by an illumination display, includes an LED ( ight mitting evice) and a light-guide coupled directly with the LED and having a light-exit surface that is coupled with a light-entry surface leading to at least one turning knob, a light-conducting plate ( ) adjacent the light-guide, and a housing. The light guide ( ) is connected with the turning knob ( ) and has, on axial surfaces ( ) at an outer rim ( ), indexing bumps and indexing indentations ( ), respectively, that cooperate with retaining catches ( ) of a retaining spring ( ) that is pushed onto the light-conducting plate ( ) within retaining ribs ( ) and is locked between an edge of the light-conducting plate ( ) and a housing rib ( ) in the push-on

Control element for control functions

A method for manufacturing housing or control-components parts of metal including the steps of: manufacturing a housing or control-component part ( ) as a forged or cast blank ( ), stamping a recess ( ) in the blank for an indicator insert with a stamping die in a stamping device, thereby creating a protrusion ( ) on a back wall surface ( ) of the part in the stamping direction, constricting the recess ( ) with peeled protrusions of the peripheral walls ( ) defining the recess ( ), injecting a transparent plastic ( ) into the recess ( ) and, if applicable, into a mold connected with the recess ( ) for forming a collar ( ) on a front wall surface ( ) in the stamping direction, and ablating the back wall surface ( ) and the protrusion ( ) by a fixed thickness amount ( ), which results in exposure of the recess ( ) and of the transparent plastic ( ).

Method for manufacturing housing or control-component parts of metal

A keyboard has keys, or buttons, having guide projections which, when the keys are pushed from an operating side, are shoved along guide plates, with motion being restricted by a locator, the locator having two stops which restrict the motion of the keys between the two stops and with a switch being activated being ON and OFF by the key moving within these limits. This provides a very flat keyboard which is economical to manufacture.

Activation keyboard, particularly for motor-vehicle climate controls

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

An operational control for use with a ventilation, heating, or air conditioning unit of a vehicle, that can be actuated by a turn knob comprises: a guide member for being attached to and manipulated by a turn knob, the guide member defining a guiding groove; an adjusting lever for actuating a Bowden cable to which the adjusting lever is linked, the adjusting lever being mounted adjacent the guide member to pivot; a guide pin attached to the adjusting lever for extending into the guiding groove for cooperating with the guiding groove to cause the adjusting lever to pivot when the guide member is manipulated. The adjusting lever is made of a material that can be welded to steel and the guide pin is a weld-on steel ball welded to the adjusting lever.

Operational control

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.

Growing community of inventors

Salz, Germany

Joachim Storath