DE19547343A1 - Knob with two actuation functions - Google Patents

Description

The invention relates to a rotary knob with two actuating functions Turn and press.

Such an operation is such. B. that of an operating mode selector switch.

Basically, such knobs are known, for. B. in car radios where the volume is regulated by turning a rotary knob, whereas by Pressing the rotary button starts a station search.

In contrast, it is an object of the invention, with the knob in one butt Select functions and trigger an adjustment function in the other sen.

A solution to this problem is explained in claim 1.

Developments of the invention are characterized in the subclaims.

The basic idea of the invention is with a rotary knob in its Normal position by turning into several defined positions several radio tion on a device, especially a stove timer. In the out In the selected position, the rotary button can be pressed and there triggers an adjustment function by generating pulses for the selected function. At the same time made a corresponding adjustment to a time display. In this way are a cooking time on a stove timer in addition to the time of day setting End of cooking time or start of cooking time and a short time can be set. All of these Common to functions is that they require a time setting. In the sense of the According to the invention, however, it is also possible to select functions in which the Adjustment function z. B. makes a temperature setting. It is important that at the adjustment function the size of the adjustment is visible on the display.

The invention is based on the drawing of an exemplary embodiment game will be explained in more detail.  

Show it:

Figure 1 is a block diagram of the operation of the rotary knob in a device.

Fig. 2 is a section through the handle in the normal position along the line II-II (Fig. 4);

Fig. 3 is a section similar to Figure 2 with the knob in a depressed position.

Fig. 4 is a plan view of the conductor tracks with a transparent contact con.

In the block diagram of FIG. 1, a rotary knob (1) is shown, which outputs (2) and (3) has. At the output ( 2 ), several lines, shown here schematically with one line, go to a control circuit ( 4 ) and transmit the information for the function set by turning the rotary knob. The output ( 3 ) is connected to a switch ( 5 ) which can connect a pulse generator ( 6 ) to a display memory ( 7 ). The latter is upstream of a display, digital or analog. At the output ( 3 ) of the rotary knob ( 1 ), after the desired function has been selected by turning, a signal appears after subsequent pressing, which closes the switch ( 5 ) and counts pulses from the pulse generator into the display memory ( 7 ). From this display memory ( 7 ), on the one hand, the display is adjusted according to the impulse, on the other hand, information about its counter reading is given to the control circuit ( 4 ), which then controls the desired function in the device at its output ( 9 ).

The knob ( 1 ) is shown in FIG. 2 with its housing ( 10 ) on a printed circuit board ( 11 ). A displaceably mounted switch axis ( 12 ) is provided in the housing ( 10 ) and can be moved downward against the force of a spring ( 13 ) in the drawing. The shaft of the actuating button - not shown - can be stored in a bore ( 14 ).

The switch axis ( 12 ) is secured against falling out of the printed circuit board ( 11 ) by a resilient part ( 10 a). A safety hook ( 15 ) is provided on the switch axis ( 12 ), which - in the preassembled state, ie before snapping into the circuit board - prevents a contact disk ( 17 ) from being pressed out by the spring ( 13 ). On the switch axis ( 12 ) a rib ( 16 ) is also injected, which serves to deflect the contact disk ( 17 ). This contact disc ( 17 ) is mounted on the switch axis ( 12 ) against rotation, but tiltable.

It has several contacts of which the contacts ( 18 ) and ( 19 ) are visible in Fig. 2, and interact with conductor tracks ( 20 ) and ( 21 ) on the circuit board ( 11 ). Finally, ( 22 ) denotes a support contact which in the exemplary embodiment rests on the concentric conductor track ( 20 ), but in this case has no electrical function. By the compression spring ( 13 ), the contact disc ( 17 ) is held in the non-pressed state of the rotary knob in the drawn horizontal position, in which the contact ( 18 ) cooperates with the conductor track ( 20 ). The support contact ( 22 ) rests on the printed circuit board ( 11 ).

For exact adjustment of the rotary knob in the desired functional positions, a detent ( 23 ) is provided on the switch axis ( 12 ), which engages with a resilient part ( 10 a) of the housing ( 10 ).

In Fig. 3 the knob is shown in the pressed position. It can be seen that the switch axis ( 12 ) has moved downwards and presses the spring ( 13 ) together. Due to the movement of the switch axis ( 12 ), the rib ( 16 ) was also moved down and the contact disk ( 17 ) tilts slightly clockwise. The contact ( 19 ) of the contact disk now comes into contact with the conductor track ( 21 ). The contact ( 18 ) remains on the conductor track ( 20 ), whereas the support contact ( 22 ) lifts off the circuit board ( 11 ).

In Fig. 4, the circuit board ( 11 ) with the conductor tracks ( 20 , 21 and 23 ) is Darge. The actually opaque contact disk ( 17 ) is shown in Fig. 4 for better recognizability because of transparent to reveal the view of the underlying conductor tracks and the corresponding contacts. The contact disk ( 17 ) lies with its contact ( 18 ) on the innermost conductor track ( 20 ). The conductor track pieces ( 23 ) are swept by a contact ( 24 ) when the contact disk ( 17 ) is turned. This contact ( 24 ) is not recognizable in FIGS. 2 and 3 because it lies behind the switch axis ( 12 ). The conductor track ( 20 ) is the central conductor track which is connected to a pole of the power source and serves the conductor track ( 23 ) due to its segmentation for the selection of the functions, ie each of these segments is assigned to a different function of the device. Finally, the conductor track ( 21 ) is assigned to the adjustment function and triggers, regardless of the point at which the contact ( 19 ) comes to lie on this conductor track, the same impulse from the pulse generator ( 6 ).

Claims (8)

1. Rotary knob with two actuating functions by turning and pressing, characterized in that various functions can be selected by rotating into defined positions and, when pressed in the selected position, an adjusting function on a device with a time display ( 8 ) is carried out by automatically generating pulses becomes. 2. Knob according to claim 1, characterized in that the knob ( 1 ) is used in a stove timer and several functions on the time display ( 8 ) such as. B. includes time, cooking time and / or start and / or end of cooking time and in the adjustment function Ver the setting of the desired time for this function is made. 3. Rotary knob according to claims 1 or 2, characterized in that the rotary knob ( 1 ) on a circuit board ( 11 ) with conductor tracks ( 20 , 21 , 23 ) mounted axis of rotation ( 12 ) with a non-rotatable but tiltable contact disc ( 17 ), and that this contact disk interacts in the two tilt positions (tilted, not tilted) with different conductor tracks. 4. Knob according to claim 3, characterized in that on the circuit board ( 11 ) at least three circular concentrically arranged conductor tracks ( 20 , 21 , 23 ) are provided, of which the innermost ( 20 ) is connected to a common pole of the voltage source, the middle ( 23 ) consists of several individual track segments, each assigned to a function, and the outermost ( 21 ) is assigned to the adjustment function and extends over a partial area of the circular circumference. 5. Knob according to claims 3 and 4, characterized in that the round, continuously conductive contact disc ( 17 ) has at least three con contacts ( 18 , 24 , 19 ) with the conductor tracks ( 20 , 21 , 23 ) on the circuit board ( 11 ) interact. 6. Knob according to claim 5, characterized in that a the contact ( 19 ) for the outermost conductor track ( 21 ) on the opposite side of the axis of rotation ( 12 ) opposite a support contact ( 22 ), the contacts when the contact plate ( 17 ) is not tilted stops on the inner ( 20 ) and the middle ( 23 ) conductor track. 7. Knob according to claim 5, characterized in that the tilted against spring force ( 13 ) contact disc ( 17 ) brings the outermost contact ( 19 ) with the outermost conductor track ( 21 ) additionally in electrical connec tion, the support contact ( 22 ) of it Pad on the printed circuit board ( 11 ), preferably the inner conductor track ( 20 ) stands out. 8. Knob according to claims 3 and 7, characterized in that on its axis of rotation ( 12 ) a rib ( 16 ) is arranged, which in the position of the knob "adjust" against spring force on the contact disk ( 17 ) presses one side tilts.