EP2244152A1 - Switching and/or adjusting element for an appliance, especially for a domestic appliance - Google Patents
Switching and/or adjusting element for an appliance, especially for a domestic appliance Download PDFInfo
- Publication number
- EP2244152A1 EP2244152A1 EP09005691A EP09005691A EP2244152A1 EP 2244152 A1 EP2244152 A1 EP 2244152A1 EP 09005691 A EP09005691 A EP 09005691A EP 09005691 A EP09005691 A EP 09005691A EP 2244152 A1 EP2244152 A1 EP 2244152A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- shaft
- adjusting element
- element according
- crank head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
- G05G1/087—Controlling members for hand actuation by rotary movement, e.g. hand wheels retractable; Flush control knobs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/08—Turn knobs
- H01H2003/085—Retractable turn knobs, e.g. flush mounted
Definitions
- the invention relates to a switching and/or adjusting element for an appliance, especially for a domestic appliance, for switching and/or adjusting an operation parameter of the appliance by rotating an adjusting knob around an axis.
- Switching or adjusting elements of this kind are well known in the art. They are used e. g. for selecting the temperature or intensity of a heating element of a domestic oven by turning a knob to a definite angular position.
- a special design of such a switching or adjustment element comes up with the possibility that the adjustment knob of the element can be moved axially between two different positions. In a first position the adjustment knob protrudes from a faceplate of the domestic appliance for ergonomically rotating the adjustment knob into the desired position. After this, the adjustment know can be pressed axially into a second position, so that substantially a flat surface of the faceplate plus switching element comes into being.
- the switching or adjustment element must be equipped in this case with arresting means which allow the positioning of the adjustment knob in the two mentioned positions.
- Respective solutions are known from DE 103 06 583 A1 , from EP 1 712 974 B1 , from EP 1 526 422 B1 , from EP 0 671 681 B1 , from WO 2007/008182 A1 , from WO 98/11574 and from DE 10 2007 002 183 A1 .
- the pre-known designs have some drawbacks: In some applications a quite huge number of parts are necessary which causes respective high costs for manufacturing and assembly. Furthermore, it has been found that the switching noises are quite loud. Finally, the required guide rails for the cooperation with a crank head weaken the parts so that the stiffness of some of the pre-known solutions is not satisfactory.
- the solution of this object according to the invention is characterized in that the switching and/or adjusting element has the following features:
- the adjusting knob is arranged torque proof on a shaft which can be moved axially along the axis and can be arrested in a first position and in a second position.
- the shaft has an opening along at least a part of its axial extension.
- a housing element is fixed at the appliance, having a carrier part which can be inserted in axial direction into the opening.
- Spring means are arranged for axially biasing the shaft relatively to the carrier part.
- means for preventing rotation are arranged at the shaft and the carrier part for preventing a relative rotation between the shaft and the carrier part.
- Arresting means are arranged for selectively arresting the shaft in the first or in the second position, wherein the arresting means comprise one single elastic arm which is fixed with the housing element and which has a crank head at its axial end and wherein the crank head contacts the shaft at a radial outer side at a guide rail which is arranged in the radial outer side of the shaft.
- the means for preventing rotation are preferably formed by at least one radial extending rib which is arranged at the outer circumference of the carrier part, wherein the rib extends into a recess which extends in axial direction and which is arranged in the inner surface of the opening.
- the housing element, the carrier part and the elastic arm are preferably made of one single piece.
- the housing element, the carrier part and the elastic arm are made from plastic material. Normally an injection moulding process is employed for this.
- the guide rail for the crank head has a first guiding area with a ramp part for deflecting the elastic arm in the circumferential direction of the shaft.
- the guide rail for the crank head can have a second guiding area opposite to the first guiding area.
- the second guiding area can have a flat surface.
- a slanted section is arranged at the radial outer side along a part of the second guiding area for moving the crank head in radial direction during its travel along the slanted section.
- first and the second guiding areas are merging at one location in a transition area at one common radial level.
- the first and the second guiding areas can furthermore merge at another location in a transition area, wherein the transition area comprises a radial step.
- the guide rail can comprises a first hook section for arresting the crank head of the elastic arm in the first position. Also, the guide rail can comprises a second hook section for arresting the crank head of the elastic arm in the second position.
- the guide rail can comprises a deflection surface which is arranged near the transition area, wherein the deflection surface is arranged under an angle relatively to the axial direction for deflecting the crank head in the circumferential direction of the shaft.
- the crank head can then have a corresponding counter surface with the same angle as the deflection surface.
- the spring means are beneficially a coil spring.
- the switching and/or adjusting element is preferably part of a domestic oven.
- the parts and especially the shaft do not need big recesses for the engagement of the crank head into the guide rail and thus a quite stiff design is reached. This allows also a reduction in material and weight of the element. So, also a spring element with a bigger diameter can be employed with an improved spring characteristic.
- Another advantage of the proposed invention is that the guide track for the crank head does not have any openings or apertures thus making the guide track quite stable. In pre-known solutions such openings are provided in the guide track.
- FIG 1 till FIG 8 a switching and/or adjusting element 1 of a domestic oven and its parts are shown by which an operation parameter of the domestic appliance can be adjusted.
- an adjustment knob 2 is employed for adjusting the parameter.
- the adjustment knob 2 has a substantial cylindrical shape. It can be rotated around an axis 3 to a desired rotational position.
- the adjustment knob 2 is connected with a shaft 4 in a torque proof way.
- the shaft 4 has an opening 5 (see FIG 2 ) with substantially circular cross section.
- a housing element 6 is connected to the domestic appliance and has a carrier part 7 with a substantially cylindrical shape.
- the diameter of the carrier part 7 fits to the opening 5, i. e. the carrier part 7 can be inserted into the opening 5.
- a spring means being a coil spring are arranged between the shaft 4 and the carrier part 7 which force those two parts away from another in axial direction a.
- Those means consist of a radial extending rib 9 at the outer circumference of the carrier part 7 extending into a corresponding recess 10 which is formed into the inner surface of the opening 5 (see specifically FIG 2 ).
- the adjusting knob 2 with the shaft 4 can be arrested in two positions A and B relatively to the housing element 6 and the carrier part 7 respectively.
- the adjusting knob 2 In the first position A (see e. g. FIG 1 ) the adjusting knob 2 is pushed in a telescopic way into the housing element 6 to obtain a flat surface of the operation panel of the domestic appliance.
- the second position B (see e. g. FIG 2 ) is used for turning the adjusting knob 2.
- the adjusting knob 2 protrudes out from the operation panel of the appliance.
- Arresting means 11 (see FIG 1 ) are employed to move the adjusting knob 2 and the shaft 4 between the two positions A and B.
- the arresting means 11 have a single elastic arm 12 which is formed from the material of the housing element 6 and the carrier part 7.
- the elastic arm 12 has a crank head 13 at its axial end.
- the shaft 4 is equipped with a guide trail 15 at a radial outer side 14 of the shaft 4.
- This guide trail 15 is designed to cooperate with the crank head 13 of the elastic arm 12.
- the guide trail 15 has a first guiding area 16, comprising a ramp part 17. Furthermore, the guide trail 15 has a second guiding area 18, being arranged opposite to the first guiding area 16.
- the first and the second guiding areas 16 and 18 form slides for the crank head 13 of the elastic arm 12 when a relative axial movement between the shaft 4 and the carrier part 7 occurs.
- transition areas 19', 19" are arranged at which the crank head 13 can transit from the first guiding area 16 to the second guiding area 18. While the transition at one end takes place at a common radial level (see transition area 19'), the transition area 19" at the other end has a radial step 20 (see FIG 5 ).
- a first hook section 21 and a second hook section 22 are arranged in the respective location.
- the crank head 13 of the elastic arm 12 can hook into the respective hook sections 21 and 22.
- the adjusting knob 2 is pressed axially.
- the movement of the shaft 4 presses the chamfer 29 (see FIG 8 ) against the third guiding area 26, so that the crank head 13 is pushed in circumferential direction until a side area 30 of the crank head 13 (see FIG 7 ) slides down the radial step 20 (due to a radial biasing of the elastic arm 12 against the radial outer side 14 of the shaft 4), so that the crank head 13 contacts the second guiding area 18.
- the shaft 4 can slide into the position B relatively to the housing element 6 and the carrier part 7 respectively due to the force of the spring means 8.
- the side area 30 of the crank head 13 slides along the second guiding area 18, while a bottom surface 31 of the crank head 13 (see FIG 6 ) contacts the radial outer side 14 of the shaft 4 and more specifically the sliding track 32 (see FIG 7 ).
- the sliding track 32 has a slanted section 33 (see FIG 1 and FIG 7 ) which brings the crank head 13 radially back to the radial position which is reached in the position B, i. e. the slanted section 33 balances the radial difference of the radial step 20.
- the crank head 13 snaps due to the elastic property of the elastic arm 12 back in the initial position, i. e. when reached the transition area 19'.
- the final position B is reached, when a hook part 34 (see FIG 8 ) of the crank head 13 hooks into the second hook section 22.
- a deflection surface 23 (see FIG 5 ) of the guide rail 15 and a corresponding counter surface 24 of the crank head 13 (see Fig 6 and Fig 7 ) make sure that a relative axial movements of the parts 4 and 7 cause a movement of the crank head 13 to the side, i. e. in circumferential direction.
- the chamfer 29 and the counter surface 24 correspond to another.
- the elastic arm 12 and also the sliding surfaces which are contacted radially by the crank head 13 can be arranged in a slanted way so that the elastic arm 12 is not biased in the position A and/or B.
- the operation of the switching and/or adjusting element 1 is as follows: When the element is brought into the position A the crank head 13 of the elastic arm 12 slides along the first guiding area 16 and the ramp part 17 on the support area 25. The crank head 13 of the elastic arm 12 is pressed by this operation in circumferential direction by the first guiding area 16; also the crank head 13 contacts radially the radial outer side 14. If the crank head 13 has passed the first guiding area 16 it snaps back in the initial middle position due to the elastic property of the elastic arm 12. If the axial pressure onto the adjusting knob 2 is now released the upper side 27 of the crank head 13 slides below the slant 28 of the first hook section 21.
- the operation of the switching and/or adjusting element 1 is as follows: When the element is brought into the position A the crank head 13 of the elastic arm 12 slides along the first guiding area 16 and the ramp part 17. By this the crank head 13 is pushed to the side in circumferential direction by the first guiding area 16 and ramp part 17. If the crank head 13 has passed the first guiding area 16 it snaps back and contacts a limitations area 35 (see FIG 23 ). If the axial pressure onto the adjusting knob 2 is now released the side area 30 of the crank head 13 slides now along the limitation area 35 until the crank head 13 is completely in front of the limitation area 35. Only now the crank head 13 can snap back into its middle or initial position due to the elastic property of the elastic arm 12. Now the hook part 34 can slide under the first hook section 21.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Control Devices (AREA)
Abstract
Description
- The invention relates to a switching and/or adjusting element for an appliance, especially for a domestic appliance, for switching and/or adjusting an operation parameter of the appliance by rotating an adjusting knob around an axis.
- Switching or adjusting elements of this kind are well known in the art. They are used e. g. for selecting the temperature or intensity of a heating element of a domestic oven by turning a knob to a definite angular position.
- A special design of such a switching or adjustment element comes up with the possibility that the adjustment knob of the element can be moved axially between two different positions. In a first position the adjustment knob protrudes from a faceplate of the domestic appliance for ergonomically rotating the adjustment knob into the desired position. After this, the adjustment know can be pressed axially into a second position, so that substantially a flat surface of the faceplate plus switching element comes into being.
- Consequently, the switching or adjustment element must be equipped in this case with arresting means which allow the positioning of the adjustment knob in the two mentioned positions.
- Respective solutions are known from
DE 103 06 583 A1 , fromEP 1 712 974 B1EP 1 526 422 B1EP 0 671 681 B1 , fromWO 2007/008182 A1 , fromWO 98/11574 DE 10 2007 002 183 A1 . - The pre-known designs have some drawbacks: In some applications a quite huge number of parts are necessary which causes respective high costs for manufacturing and assembly. Furthermore, it has been found that the switching noises are quite loud. Finally, the required guide rails for the cooperation with a crank head weaken the parts so that the stiffness of some of the pre-known solutions is not satisfactory.
- Therefore, it is an object of the invention to improve a switching and/or adjusting element of the kind mentioned above so that as few parts as possible are required. Furthermore, a stiff and compact design is aimed. Also the switching noises should be as little as possible.
- The solution of this object according to the invention is characterized in that the switching and/or adjusting element has the following features: The adjusting knob is arranged torque proof on a shaft which can be moved axially along the axis and can be arrested in a first position and in a second position. The shaft has an opening along at least a part of its axial extension. A housing element is fixed at the appliance, having a carrier part which can be inserted in axial direction into the opening. Spring means are arranged for axially biasing the shaft relatively to the carrier part. Furthermore, means for preventing rotation are arranged at the shaft and the carrier part for preventing a relative rotation between the shaft and the carrier part. Arresting means are arranged for selectively arresting the shaft in the first or in the second position, wherein the arresting means comprise one single elastic arm which is fixed with the housing element and which has a crank head at its axial end and wherein the crank head contacts the shaft at a radial outer side at a guide rail which is arranged in the radial outer side of the shaft.
- The means for preventing rotation are preferably formed by at least one radial extending rib which is arranged at the outer circumference of the carrier part, wherein the rib extends into a recess which extends in axial direction and which is arranged in the inner surface of the opening. The housing element, the carrier part and the elastic arm are preferably made of one single piece. Beneficially, the housing element, the carrier part and the elastic arm are made from plastic material. Normally an injection moulding process is employed for this.
- Preferably, the guide rail for the crank head has a first guiding area with a ramp part for deflecting the elastic arm in the circumferential direction of the shaft. In this case the guide rail for the crank head can have a second guiding area opposite to the first guiding area. The second guiding area can have a flat surface. Preferably a slanted section is arranged at the radial outer side along a part of the second guiding area for moving the crank head in radial direction during its travel along the slanted section.
- Furthermore, it is possible that the first and the second guiding areas are merging at one location in a transition area at one common radial level. The first and the second guiding areas can furthermore merge at another location in a transition area, wherein the transition area comprises a radial step.
- The guide rail can comprises a first hook section for arresting the crank head of the elastic arm in the first position. Also, the guide rail can comprises a second hook section for arresting the crank head of the elastic arm in the second position.
- The guide rail can comprises a deflection surface which is arranged near the transition area, wherein the deflection surface is arranged under an angle relatively to the axial direction for deflecting the crank head in the circumferential direction of the shaft. The crank head can then have a corresponding counter surface with the same angle as the deflection surface.
- The spring means are beneficially a coil spring.
- The switching and/or adjusting element is preferably part of a domestic oven.
- According to the suggested solution of the invention the number of parts which are necessary for the switching and adjusting element is reduced to a minimum.
- The parts and especially the shaft do not need big recesses for the engagement of the crank head into the guide rail and thus a quite stiff design is reached. This allows also a reduction in material and weight of the element. So, also a spring element with a bigger diameter can be employed with an improved spring characteristic.
- Also a very compact design becomes possible.
- By the reduction of the feed path during switching between the two positions of the element the switching noises can be reduced.
- Another advantage of the proposed invention is that the guide track for the crank head does not have any openings or apertures thus making the guide track quite stable. In pre-known solutions such openings are provided in the guide track.
- In the drawings embodiments of the invention are depicted.
- FIG 1
- shows a perspective view, partially broken, of a switch- ing and/or adjusting element of a domestic oven in a po- sition (position A) in which the adjusting knob of the element is in an inner position according to a first em- bodiment of the invention,
- FIG 2
- shows a perspective view of the switching and/or adjust- ing element, partially broken, in a position (position B) in which the adjusting knob of the element is in an outer position for being rotated according to the first embodi-
- FIG 3
- ment of the invention, shows a cross sectional side view through a switching and/or adjusting element in the position B according to the first embodiment of the invention,
- FIG 4
- shows the view C according to
FIG 3 , partially broken ac- cording to the first embodiment of the invention, - FIG 5
- shows a perspective view of the shaft of the switching and/or adjusting element according to the first embodi- ment of the invention,
- FIG 6
- shows a perspective view of the housing element with car- rier part and elastic arm of the switching and/or adjust- ing element according to the first embodiment of the in- vention,
- FIG 7
- shows an enlarged part of the view C according to
FIG 3 in a sectional depiction, where the position A is taken according to the first embodiment of the invention, - FIG 8
- shows a detail of the arrangement of
FIG 3 with the switching and/or adjusting element being in the position A according to the first embodiment of the invention, - FIG 9
- shows a perspective view of the switching and/or adjust- ing element, partially broken, in the position A accord- ing to a second embodiment of the invention,
- FIG 10
- shows a perspective view of the switching and/or adjust- ing element, partially broken, in the position B accord- ing to the second embodiment of the invention,
- FIG 11
- shows a cross sectional side view through a switching and/or adjusting element in the position A according to
- FIG 12
- the second embodiment of the invention, shows a cross sectional side view through a switching and/or adjusting element in the position B according to the second embodiment of the invention,
- FIG 13
- shows a perspective view of the shaft of the switching and/or adjusting element according to the second embodi- ment of the invention,
- FIG 14
- shows a perspective view of the housing element with car- rier part and elastic arm of the switching and/or adjust- ing element according to the second embodiment of the in- vention,
- FIG 15
- shows a view seen from the radial direction on the shaft of the switching and/or adjusting element and its guide rail according to the second embodiment of the invention,
- FIG 16
- shows a detail of the arrangement analogue to
FIG 8 ac- cording to the second embodiment of the invention, - FIG 17
- shows a perspective view of the switching and/or adjust- ing element, partially broken, in the position A accord- ing to a third embodiment of the invention,
- FIG 18
- shows a perspective view of the switching and/or adjust- ing element, partially broken, in the position B accord- ing to the third embodiment of the invention,
- FIG 19
- shows a cross sectional side view through a switching and/or adjusting element in the position A for according to the third embodiment of the invention,
- FIG 20
- shows the view D according to
FIG 19 , partially broken according to the third embodiment of the invention, - FIG 21
- shows a cross sectional side view through a switching and/or adjusting element in the position B according to the third embodiment of the invention,
- FIG 22
- shows the view E according to
FIG 21 , partially broken according to the third embodiment of the invention, - FIG 23
- shows a perspective view of the shaft of the switching and/or adjusting element according to the third embodi- ment of the invention,
- FIG 24
- shows a perspective view of the housing element with car- rier part and elastic arm of the switching and/or adjust- ing element according to the third embodiment of the in- vention,
- FIG 25
- shows a view seen from the radial direction on the shaft of the switching and/or adjusting element and its guide rail according to the third embodiment of the invention,
- FIG 26
- shows a detail of the arrangement analogue to
FIG 8 ac- cording to the third embodiment of the invention. - In
FIG 1 tillFIG 8 a switching and/or adjustingelement 1 of a domestic oven and its parts are shown by which an operation parameter of the domestic appliance can be adjusted. For adjusting the parameter anadjustment knob 2 is employed. Theadjustment knob 2 has a substantial cylindrical shape. It can be rotated around anaxis 3 to a desired rotational position. Theadjustment knob 2 is connected with ashaft 4 in a torque proof way. Theshaft 4 has an opening 5 (seeFIG 2 ) with substantially circular cross section. - A
housing element 6 is connected to the domestic appliance and has acarrier part 7 with a substantially cylindrical shape. The diameter of thecarrier part 7 fits to theopening 5, i. e. thecarrier part 7 can be inserted into theopening 5. - As can be seen from
FIG 3 a spring means being a coil spring are arranged between theshaft 4 and thecarrier part 7 which force those two parts away from another in axial direction a. - Between the
shaft 4 and thecarrier part 7 means 9, 10 are arranged for preventing a rotational movement between the two parts. Those means consist of aradial extending rib 9 at the outer circumference of thecarrier part 7 extending into acorresponding recess 10 which is formed into the inner surface of the opening 5 (see specificallyFIG 2 ). - The adjusting
knob 2 with theshaft 4 can be arrested in two positions A and B relatively to thehousing element 6 and thecarrier part 7 respectively. In the first position A (see e. g.FIG 1 ) the adjustingknob 2 is pushed in a telescopic way into thehousing element 6 to obtain a flat surface of the operation panel of the domestic appliance. The second position B (see e. g.FIG 2 ) is used for turning the adjustingknob 2. Here the adjustingknob 2 protrudes out from the operation panel of the appliance. - Arresting means 11 (see
FIG 1 ) are employed to move the adjustingknob 2 and theshaft 4 between the two positions A and B. The arresting means 11 have a singleelastic arm 12 which is formed from the material of thehousing element 6 and thecarrier part 7. Theelastic arm 12 has acrank head 13 at its axial end. - The
shaft 4 is equipped with aguide trail 15 at a radialouter side 14 of theshaft 4. Thisguide trail 15 is designed to cooperate with thecrank head 13 of theelastic arm 12. - As can be seen in the different figures the
guide trail 15 has afirst guiding area 16, comprising aramp part 17. Furthermore, theguide trail 15 has asecond guiding area 18, being arranged opposite to thefirst guiding area 16. The first and thesecond guiding areas crank head 13 of theelastic arm 12 when a relative axial movement between theshaft 4 and thecarrier part 7 occurs. In the end regions of themovement transition areas 19', 19" (seeFIG 5 ) are arranged at which thecrank head 13 can transit from thefirst guiding area 16 to thesecond guiding area 18. While the transition at one end takes place at a common radial level (see transition area 19'), thetransition area 19" at the other end has a radial step 20 (seeFIG 5 ). - For arresting the
shaft 4 relatively to thecarrier part 7 in the two positions A and B afirst hook section 21 and asecond hook section 22 are arranged in the respective location. As can be seen e. g. fromFIG 1 and FIG 2 thecrank head 13 of theelastic arm 12 can hook into therespective hook sections - When bringing the adjusting
knob 2 and theshaft 4 from the outer position B in the inserted position A thecrank head 13 of theelastic arm 12 slides along thefirst guiding area 16 and theramp part 17 via thefirst hook section 21 on a support area 25 (see e. g.FIG 8 ). As the length of the gap L1 (seeFIG 8 ) between thesupport area 25 and the beginning of thefirst hook section 21 is smaller than the length LK of thecrank head 13, it is not possible that thecrank head 13 snaps in front of athird guiding area 26 when being pressed once only. After the axial pressure on the adjustingknob 2 and theshaft 4 is released theupper side 27 of thecrank head 13 slides along aslant 28 into the hooked position, i. e. into thefirst hook section 21. Only now it is possible, that thecrank head 13 with achamfer 29 snaps in front of thethird guiding area 26. Now, the interlock in the position A is done. - To bring the switching and/or adjusting
element 1 and the adjustingknob 2 respectively into the position B, i. e. to drive the adjustingknob 2 outwardly for turning, the adjustingknob 2 is pressed axially. By doing this the movement of theshaft 4 presses the chamfer 29 (seeFIG 8 ) against thethird guiding area 26, so that thecrank head 13 is pushed in circumferential direction until aside area 30 of the crank head 13 (seeFIG 7 ) slides down the radial step 20 (due to a radial biasing of theelastic arm 12 against the radialouter side 14 of the shaft 4), so that thecrank head 13 contacts thesecond guiding area 18. - If the axial pressure on the adjusting know 2 is released, the
shaft 4 can slide into the position B relatively to thehousing element 6 and thecarrier part 7 respectively due to the force of the spring means 8. During this operation theside area 30 of the crank head 13 (seeFIG 7 ) slides along thesecond guiding area 18, while abottom surface 31 of the crank head 13 (seeFIG 6 ) contacts the radialouter side 14 of theshaft 4 and more specifically the sliding track 32 (seeFIG 7 ). - The sliding
track 32 has a slanted section 33 (seeFIG 1 andFIG 7 ) which brings thecrank head 13 radially back to the radial position which is reached in the position B, i. e. the slantedsection 33 balances the radial difference of theradial step 20. At the end of the slantedsection 33 thecrank head 13 snaps due to the elastic property of theelastic arm 12 back in the initial position, i. e. when reached the transition area 19'. The final position B is reached, when a hook part 34 (seeFIG 8 ) of thecrank head 13 hooks into thesecond hook section 22. - A deflection surface 23 (see
FIG 5 ) of theguide rail 15 and acorresponding counter surface 24 of the crank head 13 (seeFig 6 andFig 7 ) make sure that a relative axial movements of theparts crank head 13 to the side, i. e. in circumferential direction. Thechamfer 29 and thecounter surface 24 correspond to another. - The
elastic arm 12 and also the sliding surfaces which are contacted radially by thecrank head 13 can be arranged in a slanted way so that theelastic arm 12 is not biased in the position A and/or B. - Two slightly modified embodiments of the invention are shown in
figures 9 till 16 (second embodiment) and infigures 17 till 26 (third embodiment). - Referring now to
figures 9 till 16 the operation of the switching and/or adjustingelement 1 is as follows: When the element is brought into the position A thecrank head 13 of theelastic arm 12 slides along thefirst guiding area 16 and theramp part 17 on thesupport area 25. Thecrank head 13 of theelastic arm 12 is pressed by this operation in circumferential direction by thefirst guiding area 16; also thecrank head 13 contacts radially the radialouter side 14. If thecrank head 13 has passed thefirst guiding area 16 it snaps back in the initial middle position due to the elastic property of theelastic arm 12. If the axial pressure onto the adjustingknob 2 is now released theupper side 27 of thecrank head 13 slides below theslant 28 of thefirst hook section 21. - Only now it is possible that the
crank head 13 with itschamfer 29 snaps in front of thethird guiding area 26. Position A is reached. - The way back into position B is done as explained for the embodiment according
figures 1 till 8. - Referring now to
figures 17 till 26 the operation of the switching and/or adjustingelement 1 is as follows: When the element is brought into the position A thecrank head 13 of theelastic arm 12 slides along thefirst guiding area 16 and theramp part 17. By this thecrank head 13 is pushed to the side in circumferential direction by thefirst guiding area 16 and ramppart 17. If thecrank head 13 has passed thefirst guiding area 16 it snaps back and contacts a limitations area 35 (seeFIG 23 ). If the axial pressure onto the adjustingknob 2 is now released theside area 30 of thecrank head 13 slides now along thelimitation area 35 until thecrank head 13 is completely in front of thelimitation area 35. Only now thecrank head 13 can snap back into its middle or initial position due to the elastic property of theelastic arm 12. Now thehook part 34 can slide under thefirst hook section 21. - Reference Numerals
- 1
- Switching and/or adjusting element
- 2
- Adjusting knob
- 3
- Axis
- 4
- Shaft
- 5
- Opening
- 6
- Housing element
- 7
- Carrier part
- 8
- Spring means
- 9, 10
- Means for preventing rotation
- 9
- Radial extending rib
- 10
- Recess
- 11
- Arresting means
- 12
- Elastic arm
- 13
- Crank head
- 14
- Radial outer side
- 15
- Guide rail
- 16
- First guiding area
- 17
- Ramp part
- 18
- Second guiding area
- 19'
- Transition area
- 19"
- Transition area
- 20
- Radial step
- 21
- First hook section
- 22
- Second hook section
- 23
- Deflection surface
- 24
- Counter surface
- 25
- Support area
- 26
- Third guiding area
- 27
- Upper side
- 28
- Slant
- 29
- Chamfer
- 30
- Side area
- 31
- Bottom surface
- 32
- Sliding track
- 33
- Slanted section
- 34
- Hook part
- 35
- Limitation area
- a
- Axial direction
- A
- First position
- B
- Second position
- L1
- Length
- LK
- Length
Claims (15)
- Switching and/or adjusting element (1) for an appliance, especially for a domestic appliance, for switching and/or adjusting an operation parameter of the appliance by rotating an adjusting knob (2) around an axis (3),
wherein the adjusting knob (2) is arranged torque proof on a shaft (4) which can be moved axially (a) along the axis (3) and can be arrested in a first position (A) and in a second position (B),
wherein the shaft (4) has an opening (5) along at least a part of its axial extension,
wherein a housing element (6) is fixed at the appliance, having a carrier part (7) which can be inserted in axial direction (a) into the opening (5),
wherein spring means (8) are arranged for axially biasing the shaft (4) relatively to the carrier part (7),
wherein means for preventing rotation (9, 10) are arranged at the shaft (4) and the carrier part (7) for preventing a relative rotation between the shaft (4) and the carrier part (7), wherein arresting means (11) are arranged for selectively arresting the shaft (4) in the first or in the second position (A, B),
wherein the arresting means (11) comprise one single elastic arm (12) which is fixed with the housing element (6) and which has a crank head (13) at its axial end and
wherein the crank head (13) contacts the shaft (4) at a radial outer side (14) at a guide rail (15) which is arranged in the radial outer side (14) of the shaft (4). - Switching and/or adjusting element according to claim 1, characterized in that the means for preventing rotation (9, 10) are formed by at least one radial extending rib (9) which is arranged at the outer circumference of the carrier part (7), wherein the rib (9) extends into a recess (10) which extends in axial direction (a) and which is arranged in the inner surface of the opening (5).
- Switching and/or adjusting element according to claim 1 or 2, characterized in that the housing element (6), the carrier part (7) and the elastic arm (12) are made of one single piece.
- Switching and/or adjusting element according to claim 3, characterized in that the housing element (6), the carrier part (7) and the elastic arm (12) are made from plastic material.
- Switching and/or adjusting element according to one of claims 1 till 4, characterized in that the guide rail (15) for the crank head (13) has a first guiding area (16) with a ramp part (17) for deflecting the elastic arm in the circumferential direction of the shaft (4).
- Switching and/or adjusting element according to claim 5, characterized in that the guide rail (15) for the crank head (13) has a second guiding area (18) opposite to the first guiding area (16).
- Switching and/or adjusting element according to claim 6, characterized in that the second guiding area (18) has a flat surface, wherein preferably a slanted section (33) is arranged at the radial outer side (14) along at least a part of the second guiding area (18) for moving the crank head (13) in radial direction during its travel along the slanted section (33).
- Switching and/or adjusting element according to claim 5 and 6, characterized in that the first and the second guiding areas (16, 18) are merging at one location in a transition area (19, 19') at one common radial level.
- Switching and/or adjusting element according to claim 5 and 6, characterized in that the first and the second guiding areas (16, 18) are merging at another location in a transition area (19, 19"), wherein the transition area (19") comprises a radial step (20).
- Switching and/or adjusting element according to one of claims 1 till 9, characterized in that the guide rail (15) comprises a first hook section (21) for arresting the crank head (13) of the elastic arm (12) in the first position (A).
- Switching and/or adjusting element according to one of claims 1 till 9, characterized in that the guide rail (15) comprises a second hook section (22) for arresting the crank head (13) of the elastic arm (12) in the second position (B).
- Switching and/or adjusting element according to one of claims 8 till 11, characterized in that the guide rail (15) comprises a deflection surface (23) which is arranged near the transition area (19), wherein the deflection surface (23) is arranged under an angle relatively to the axial direction (a) for deflecting the crank head (13) in the circumferential direction of the shaft (4).
- Switching and/or adjusting element according to claim 12, characterized in that the crank head (13) has a corresponding counter surface (24) with the same angle as the deflection surface (23).
- Switching and/or adjusting element according to at least one of claims 1 till 13, characterized in that the spring means (9) are a coil spring.
- Switching and/or adjusting element according to at least one of claims 1 till 14, characterized in that it is part of a domestic oven.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09005691A EP2244152A1 (en) | 2009-04-23 | 2009-04-23 | Switching and/or adjusting element for an appliance, especially for a domestic appliance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09005691A EP2244152A1 (en) | 2009-04-23 | 2009-04-23 | Switching and/or adjusting element for an appliance, especially for a domestic appliance |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2244152A1 true EP2244152A1 (en) | 2010-10-27 |
Family
ID=41009994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09005691A Withdrawn EP2244152A1 (en) | 2009-04-23 | 2009-04-23 | Switching and/or adjusting element for an appliance, especially for a domestic appliance |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2244152A1 (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2322442A1 (en) * | 1975-08-29 | 1977-03-25 | Tschudin & Heid Ag | PUSH-BUTTON SWITCH |
DE4230160A1 (en) * | 1992-09-09 | 1994-03-10 | Bosch Siemens Hausgeraete | Rotary knob |
WO1998011574A1 (en) | 1996-09-12 | 1998-03-19 | Arçelik A.S. | Control knob used for household appliances |
EP0671681B1 (en) | 1994-03-09 | 1998-07-08 | Whirlpool Europe B.V. | Retractable turning knob |
DE10306583A1 (en) | 2003-02-17 | 2004-09-02 | BSH Bosch und Siemens Hausgeräte GmbH | A latching system for depressible items, such as cooker switch knobs, has a sliding part within a housing having deformable retaining bars engaging a heart shaped projection on the sliding part |
WO2007008182A2 (en) | 2005-07-08 | 2007-01-18 | Ocak Kalip Imalat San. Ve Tic. Ltd. Sti. | Improvement in control button used in cookers |
EP1526422B1 (en) | 2003-10-22 | 2007-02-14 | Lisi Automotive Rapid | Retractable rotating knob of a switch or positioning device, especially of a household appliance |
WO2008039159A1 (en) * | 2006-09-27 | 2008-04-03 | Ocak Kalip Makina Imalat Sanayi Ve Ticaret Limited Sirketi | Reinforced locker in control knob mechanisms |
DE102007002183A1 (en) | 2007-01-15 | 2008-07-17 | BSH Bosch und Siemens Hausgeräte GmbH | Storage device for concealable control element for household appliance, has securing device forming containment component for curved member towards guide way of another curve member, and limiting former curve member in its movement |
EP1712974B1 (en) | 2005-04-13 | 2008-08-27 | Lisi Automotive Rapid | Retractable rotating knob of a switch or positioning device, especially of a household appliance |
-
2009
- 2009-04-23 EP EP09005691A patent/EP2244152A1/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2322442A1 (en) * | 1975-08-29 | 1977-03-25 | Tschudin & Heid Ag | PUSH-BUTTON SWITCH |
DE4230160A1 (en) * | 1992-09-09 | 1994-03-10 | Bosch Siemens Hausgeraete | Rotary knob |
EP0671681B1 (en) | 1994-03-09 | 1998-07-08 | Whirlpool Europe B.V. | Retractable turning knob |
WO1998011574A1 (en) | 1996-09-12 | 1998-03-19 | Arçelik A.S. | Control knob used for household appliances |
DE10306583A1 (en) | 2003-02-17 | 2004-09-02 | BSH Bosch und Siemens Hausgeräte GmbH | A latching system for depressible items, such as cooker switch knobs, has a sliding part within a housing having deformable retaining bars engaging a heart shaped projection on the sliding part |
EP1526422B1 (en) | 2003-10-22 | 2007-02-14 | Lisi Automotive Rapid | Retractable rotating knob of a switch or positioning device, especially of a household appliance |
EP1712974B1 (en) | 2005-04-13 | 2008-08-27 | Lisi Automotive Rapid | Retractable rotating knob of a switch or positioning device, especially of a household appliance |
WO2007008182A2 (en) | 2005-07-08 | 2007-01-18 | Ocak Kalip Imalat San. Ve Tic. Ltd. Sti. | Improvement in control button used in cookers |
WO2008039159A1 (en) * | 2006-09-27 | 2008-04-03 | Ocak Kalip Makina Imalat Sanayi Ve Ticaret Limited Sirketi | Reinforced locker in control knob mechanisms |
DE102007002183A1 (en) | 2007-01-15 | 2008-07-17 | BSH Bosch und Siemens Hausgeräte GmbH | Storage device for concealable control element for household appliance, has securing device forming containment component for curved member towards guide way of another curve member, and limiting former curve member in its movement |
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