Rotary selector

• US 7,439,835 B2
• Filed: 01/31/2005
• Issued: 10/21/2008
• Est. Priority Date: 07/31/2002
• Status: Expired due to Fees

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Dietrich, Mike, Kaltofen, Thomas, Lamprecht, Michael
• Primary Examiner(s): Donovan; Lincoln
• Assistant Examiner(s): Rojas; Bernard
• Application Number:
  US11/048,508
• Publication Number:
  US 20050205395A1
• Time in Patent Office: 1,359 Days
• Field of Search: 324/207.2, 324/207.21, 324/207.25, 324/207.5, 335205-207
• US Class Current: 335/207
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06
• CPC Class Codes: H01H 19/11 with indexing means
• CPC Class Codes: H01H 2043/107 Bidirectional selecting means, e.g. the program selecting knob being turnable in both directions
• CPC Class Codes: H01H 2043/108 where at least some contacts of electromechanical timer give instructions to electronic timer and/or the timing motor is under control of electronic timer, e.g. hybrid timer
• CPC Class Codes: H01H 36/0033 Mountings; Housings; Connections
• CPC Class Codes: H01H 43/106 Manual programme selecting means
• CPC Class Codes: H01H 9/182 Illumination of the symbols or distinguishing marks H01H9/181 takes precedence

Abstract

A rotary selector as display console for contact-free on and off switching as well as for switching of the automatic control of a number of different cycles of electronically operated domestic applicances, such as washing machines, dryers, dishwashers or comparable units. The rotary selector (1) has mutually communicating catch devices and a plate arranged at a distance thereto with a rotary field sensor acording to Hall technology, whereby spring-loaded ball lockings enable defined and switchable rotation of an operating element (2) with magnetic device in ranges up to 360°, and whereby angle-dependent variables for control of a wide range of cycles are generated in a known manner in the rotary field sensor.

Claims

1. A rotary selector usable as display console for contact-free on and off switching and for automatic control of a number of different cycles of an electrically operated device, the selector comprising:

a rotatable operating element having a rotational axis and magnetic device axially arranged on the operating element;

a panel comprising a guide component including a fixable plate and a magnetic rotary field sensor connected to the fixable plate, the operating element being received by the guide component;

at least one of the guide component and the operating element having a catch element, and the other having a locking contour, the catch element engaging the locking contour with a force along a plane that is perpendicular to the rotational axis of the operating element and forming multiple defined steps as the operating element rotates with respect to the guide component; and

the magnetic device being disposed a distance from the rotary field sensor and being rotatably movable in a defined step-wise manner with respect to the rotary field sensor, the rotation of the magnetic device corresponding to the operation of the rotary field sensor and the distance of the magnetic device from the rotary field sensor remaining the same throughout the rotation of the magnetic device.

2. The rotary selector of claim 1, wherein the operating element includes the catch element having a hollow cylindrical ball guide, a radially inserted spring element disposed within the ball guide, and at least one ball, the spring element acting on the ball in a radially outwardly direction.

3. The rotary selector of claim 2, wherein the catch element includes a double ball catch with two radial opposing balls acting in the ball guide against the compression spring.

4. The rotary selector of claim 2, wherein the guide component has an internal cylindrical surface including the locking contour defining multiple axial depressions individually adapted for engaging the ball, the number of axial depressions being selectable in response to the desired quantity of work and program steps to be controlled.

5. The rotary selector of claim 1, wherein the guide component includes the catch element having radial spring guides and a spring element and at least one ball disposed in the spring guide, the balls corresponding to the locking contour defined on the operating element.

6. The rotary selector of claim 1, wherein the plate includes guide bores and the guide component includes guide pins engaging corresponding guide pins, the rotary field sensor being arranged centrally to the axis of the plate and configured as a Hall element.

7. The rotary selector of claim 1, wherein the operating element includes a first threaded part engaging the guide component.

8. The rotary selector of claim 1, wherein the operating element has retaining pegs that engage an annular surface on the guide component for axially pivotal bearing attachment of the operating element.

9. The rotary selector of claim 1, wherein the operating element has retaining pegs engaging the guide component and a lever is attached to one of the retaining pegs and contacts a microbutton arranged on the plate when the operating element is in a defined position with respect to the guide component.

10. The rotary selector of claim 9, wherein the microbutton is connected to a relay for switching on and off the power supply for the electrically operated device.

11. The rotary selector of claim 1, further comprising at least one light source positioned on the plate.

12. The rotary selector of claim 1, wherein the light source includes light-emitting diodes.

13. The rotary selector of claim 12, wherein the panel includes a recess defining a depression and circularly arranged openings disposed near the recess, the light-emitting diodes being arranged such that the depression in the panel is indirectly illuminated through the openings.

14. The rotary selector of claim 1, wherein the plate includes a printed circuit board carrying electronic structural elements, the plate being connected to the electronic structural elements as part of the printed circuit board.

15. The rotary selector of claim 1, wherein the magnetic device is coupled to the magnetic rotary field sensor without physical contact by Hall sensor technology and wherein an interface is integrated in the rotary field sensor via which an angle-dependent code is transferred to an electronic evaluation and control unit.

16. A rotary selector for contact-free on and off switching and for automatic control multiple operating cycles of a household appliance, the selector comprising:

a rotatable operating element having a magnetic device axially arranged on the operating element;

a panel comprising a recess forming a depression and a cylindrical guide component connected to the recess with at least one annular leg, the operating element being received by the guide component and having retaining pegs engaging an annular surface of the guide component, the operating element having a catch element and the guide component having a locking contour, the catch element engaging the locking contour and forming multiple defined steps as the operating element rotates with respect to the guide component; and

a fixable plate connected to the guide component and having a magnetic rotary field sensor connected to the fixable plate, the magnetic device being disposed a distance from the rotary field sensor and being rotatably movable in a defined step-wise manner with respect to the rotary field sensor, the rotation of the magnetic device corresponding to the operation of the rotary field sensor.

17. The rotary selector of claim 16, wherein the catch element includes a hollow cylindrical ball guide, a radially inserted spring element disposed within the ball guide, and at least one ball, the locking contour defining multiple axial depressions, the spring element acting on the ball and biasing the ball in a radially outwardly direction to engage one of the axial depressions.

18. The rotary selector of claim 16, wherein the magnetic device is coupled to the magnetic rotary field sensor without physical contact by Hall sensor technology and wherein an interface is integrated in the rotary field sensor via which an angle-dependent code is transferred to an electronic evaluation and control unit.

19. The rotary selector of claim 16, further comprising at least one light-emitting diode positioned on the plate facing the operating element, the panel having at least one circularly arranged opening on the annular leg, the at least one light-emitting diode being arranged such that the depression in the panel is indirectly illuminated through the at least one opening.

20. A washing machine comprising:

a housing;

a drum at least partially disposed within the housing and mounted for rotation with respect to the housing;

a control unit controlling the on and off switching and the automatic control of multiple operational cycles of the washing machine;

a rotatable operating element having a magnetic device axially arranged on the operating element;

a panel supported by the housing and comprising a recess forming a depression and a cylindrical guide component connected to the recess with at least one annular leg, the operating element being axially received by the guide component and having retaining pegs engaging an annular surface of the guide component, the operating element having a catch element and the guide component having a locking contour, the catch element engaging the locking contour and forming multiple defined steps as the operating element rotates with respect to the guide component;

a fixable plate connected to the guide component and having a magnetic rotary field sensor connected to the fixable plate, the magnetic device being disposed a distance from the rotary field sensor and being rotatably movable in a defined step-wise manner with respect to the rotary field sensor;

the magnetic device being coupled via its magnetic field to the magnetic rotary field sensor in non-contacting Hall sensor technology, the rotary field sensor sensing the position of the magnetic device with respect to the rotary field sensor; and

an interface integrated into the rotary field sensor and sending a signal to the control unit representing the position of the magnetic device with respect to the rotary field sensor, the signal corresponding to one of the multiple operational cycles of the washing machine.