EP0229472B1 - Control knob - Google Patents
Control knob Download PDFInfo
- Publication number
- EP0229472B1 EP0229472B1 EP19860309255 EP86309255A EP0229472B1 EP 0229472 B1 EP0229472 B1 EP 0229472B1 EP 19860309255 EP19860309255 EP 19860309255 EP 86309255 A EP86309255 A EP 86309255A EP 0229472 B1 EP0229472 B1 EP 0229472B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control knob
- flap members
- flap
- disposed
- finger grip
- 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.)
- Expired
Links
- 210000003811 finger Anatomy 0.000 description 9
- 210000003195 fascia Anatomy 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 210000003813 thumb Anatomy 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/124—Control panels
-
- 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
Definitions
- This invention relates to control knobs.
- United States Patent Specification No. 3 066 550 discloses a control knob comprising a body to be manipulated by an operator, the body providing a connection to a control device and flap means mounted on the body to form a flat frontal surface (to enable the knob to be mounted flush with a casing or fascia of an appliance) for the body, the flap means being pivotable to afford a finger grip for the body.
- the flap means comprises a pair of laterally disposed flap members which are pivoted relative to the body and which are spring biased so that they normally lie substantially in the same plane, the flap members being rotatable against the spring bias to afford a finger grip portion by means of which the control knob may be operated.
- the flap members may be rotated to afford the finger grip portion, or they may be rotated to afford access to a finger grip portion.
- the control knob depicted in Fig. 1 of the drawings comprises a hollow, generally hemispherical body 1, into the opening of which is designed to fit a pair of laterally disposed semi-circular shaped flap members 2.
- the flap members 2 are provided over approximately half the length of their straight edge with an inward flange 3 in which is a through bore 4 which is aligned with the straight edge.
- the two flap members 2 are assembled together by means of a pivot pin 5 which extends through the bores 4 in the flap members 2 and which also engages diametrically opposed holes 6 in the body 1.
- the body 1 may be provided with grooves 6a, as shown in the detail drawing of Fig. 1a, into which the pivot pin 5 may be snapped.
- a spring 7, which is contained in an enlarged area 8 of the through bore 4, the spring 7 having the effect of biasing the flap members 2 outwards so that they are substantially flush with the outside rim of the body 1.
- Fig. 2 of the drawings the control knob of Fig. 1 is shown assembled on the spindle 9 of a control device 10 which may, for example, be an energy regulator of an electric cooker, or a gas tap of a gas cooker.
- the control device 10 may, of course, take any convenient form.
- the knob is fitted behind a suitable hole 11 in a fascia panel 12 so that the front surface of the knob is substantially flush with the fascia panel 12.
- the spindle 9 of the control device 10 is conveniently of 'D' shaped cross-section and engages with a corresponding shaped hole 13 in the body 1, an inner boss 14 being formed in the body 1 into which the hole 13 extends.
- Operation of the control knob is effected by causing the flap members 2 to be pushed rotatively inwards towards each other, using a finger and thumb, against the bias of the spring 7, whereby the flap members 2 form a finger grip portion which may be gripped to effect rotation of the spindle 9 of the control device 10.
- the flap members 2 assume their normal 'flush' position under the action of the spring 7.
- the flap members 2 may be made completely flush with the outer surface of the fascia panel 12 by providing that the outer rims of the flap members 2 are recessed to take account of the thickness of the fascia panel 12.
- control knob is used to effect rotation of the spindle 9 of a control device 10, it is envisaged that it may also be used in conjunction with a linear (slide)-control device.
- the shape of the flap members 2 may be of any convenient form depending upon the particular application.
- the flap members 2 are conveniently of semi-circular shape, whereas for linear operation they may be of square or rectangular shape.
- a rotary control knob with information indicative of its rotary position
- Figs. 5 and 6 of the drawings there is shown the control knob of Fig. 1 provided with a cylindrical skirt 15 which is formed integrally with the body 1 and on which is provided numerical information 16.
- Figs. 7 and 8 the control knob of Fig. 1 is shown provided with a radially disposed skirt 17 which is formed integrally with the body 1 and flush with the flaps 2 and on which is provided numerical information 18.
- the information carrying skirts 15 and 17 are shown as being formed integrally with the body 1 of the control knob, it will be appreciated that they could be separate from the body 1 and attachable to it. It will also be appreciated that the information provided on the skirts 15 and 17 may take any form.
- Fig. 9 of the drawings there is shown an alternative form of construction of the control knob of Fig. 1, in which the body 1 thereof is provided with an internal, diametrically formed bar 19, the top 20 of which is provided with integrally formed 'living hinges' 21 which connect the flaps 2 to the bar 19, thereby dispensing with the spindle 9 and spring 7 of the control knob of Fig. 1.
- the operation of the control knob of Fig. 9 is identical to that of Fig. 1.
- FIGs. 10 to 12 of the accompanying drawings there is shown an alternative form of construction of the control knob of Fig. 1 in which the flaps 2, instead of being pivoted along their straight edges are provided with tangentially disposed outer pivots 23 which, when the flaps 2 are deflected inwards permits access to a diametrically disposed central bar 24 which forms a finger grip for the control knob.
- the flaps 2 are provided with a tangentially disposed flange 25 having a through bore 26 in which locates a pivot pin 27 which slots into grooves 28 in the body 1 of the control knob.
- they are each provided with an angled leaf-spring element 29 a lower part 30 of which slides into opposed slots 32 in the body 1 of the control knob, and an upper part 31 of which locates under the respective flap 2 to bias it in the 'flush' position but which enables it to be deflected inwards as required to provide access to the finger grip bar 24.
- control knob may be mounted on a control spindle 9 and may be located in a hole in a fascia plate 12.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Control Devices (AREA)
Description
- This invention relates to control knobs.
- With reference to Patent Application No. 2 183 313 in the United Kingdom, the Applicant has voluntarily limited the scope of the present application, and has submitted separate claims for the United Kingdom.
- It has become desirable for safety and aesthetic reasons to provide controls, such as the controls on electric or gas cookers, fires etc., with knobs which are substantially flush with the casing or fascia of such appliances.
- Such knobs are advantageous in that they give the appliance a streamlined look, they are difficult to inadvertently turn on and they tend to be, to some extent, childproof. United States Patent Specification No. 3 066 550 discloses a control knob comprising a body to be manipulated by an operator, the body providing a connection to a control device and flap means mounted on the body to form a flat frontal surface (to enable the knob to be mounted flush with a casing or fascia of an appliance) for the body, the flap means being pivotable to afford a finger grip for the body.
- According to the present invention, the flap means comprises a pair of laterally disposed flap members which are pivoted relative to the body and which are spring biased so that they normally lie substantially in the same plane, the flap members being rotatable against the spring bias to afford a finger grip portion by means of which the control knob may be operated.
- In carrying out the invention, the flap members may be rotated to afford the finger grip portion, or they may be rotated to afford access to a finger grip portion.
- By way of example only, some exemplary embodiments of the invention will now be described reference being made to the accompanying drawings, in which:
- Fig. 1, is an exploded view of one form of control knob in accordance with the present invention.
- Fig. 1a, is a detail view of an alternative construction of part of the control knob of Fig. 1;
- Fig. 2, is a cross-sectional side view depicting a control knob in accordance with Fig. 1 assembled on the spindle of a typical control device;
- Fig. 3, depicts the operation of the control knob of Fig. 2;
- Fig. 4, is a cross-sectional side view of an alternative construction of the control knob of Fig. 1;
- Fig. 5, is a cross-sectional side view of the control knob of Fig. 1 provided with a cylindrical information carrying skirt;
- Fig. 6, is a perspective view of the control knob of Fig. 5;
- Fig. 7, is a cross-sectional side view of the control knob of Fig. 1 provided with radially disposed information carrying skirt;
- Fig. 8, is a perspective view of the control knob of Fig. 7;
- Fig. 9, is a cross-sectional view of an alternative form of construction of the control knob of Fig. 1, provided with integral hinge flaps;
- Fig. 10, is a perspective view of another form of control knob in accordance with the present invention;
- Fig. 11, is an exploded view of the control knob of Fig. 10; and
- Fig. 12, is a cross-sectional side view of the control knob of Fig. 10.
- The control knob depicted in Fig. 1 of the drawings comprises a hollow, generally
hemispherical body 1, into the opening of which is designed to fit a pair of laterally disposed semi-circular shapedflap members 2. Theflap members 2 are provided over approximately half the length of their straight edge with aninward flange 3 in which is a through bore 4 which is aligned with the straight edge. The twoflap members 2 are assembled together by means of apivot pin 5 which extends through the bores 4 in theflap members 2 and which also engages diametrically opposed holes 6 in thebody 1. As an alternative to using holes 6, thebody 1 may be provided withgrooves 6a, as shown in the detail drawing of Fig. 1a, into which thepivot pin 5 may be snapped. Between the flap members 4 and on thepivot pin 5 is disposed a spring 7, which is contained in an enlargedarea 8 of the through bore 4, the spring 7 having the effect of biasing theflap members 2 outwards so that they are substantially flush with the outside rim of thebody 1. - In Fig. 2 of the drawings the control knob of Fig. 1 is shown assembled on the
spindle 9 of acontrol device 10 which may, for example, be an energy regulator of an electric cooker, or a gas tap of a gas cooker. Thecontrol device 10 may, of course, take any convenient form. The knob is fitted behind asuitable hole 11 in afascia panel 12 so that the front surface of the knob is substantially flush with thefascia panel 12. - The
spindle 9 of thecontrol device 10 is conveniently of 'D' shaped cross-section and engages with a correspondingshaped hole 13 in thebody 1, aninner boss 14 being formed in thebody 1 into which thehole 13 extends. - Operation of the control knob, as is depicted in Fig. 3, is effected by causing the
flap members 2 to be pushed rotatively inwards towards each other, using a finger and thumb, against the bias of the spring 7, whereby theflap members 2 form a finger grip portion which may be gripped to effect rotation of thespindle 9 of thecontrol device 10. When the finger and thumb are removed, theflap members 2 assume their normal 'flush' position under the action of the spring 7. - As is depicted in Fig. 4, the
flap members 2 may be made completely flush with the outer surface of thefascia panel 12 by providing that the outer rims of theflap members 2 are recessed to take account of the thickness of thefascia panel 12. - Although, as described in relation to Figs. 2 and 3, the control knob is used to effect rotation of the
spindle 9 of acontrol device 10, it is envisaged that it may also be used in conjunction with a linear (slide)-control device. - It will be appreciated that the shape of the
flap members 2 may be of any convenient form depending upon the particular application. Thus, for rotary operation, theflap members 2 are conveniently of semi-circular shape, whereas for linear operation they may be of square or rectangular shape. - In some applications it is necessary to provide a rotary control knob with information indicative of its rotary position, and in Figs. 5 and 6 of the drawings there is shown the control knob of Fig. 1 provided with a
cylindrical skirt 15 which is formed integrally with thebody 1 and on which is providednumerical information 16. - In Figs. 7 and 8, the control knob of Fig. 1 is shown provided with a radially disposed
skirt 17 which is formed integrally with thebody 1 and flush with theflaps 2 and on which is providednumerical information 18. - Although in Figs. 5 and 6 and Figs. 7 and 8 the
information carrying skirts body 1 of the control knob, it will be appreciated that they could be separate from thebody 1 and attachable to it. It will also be appreciated that the information provided on theskirts - In Fig. 9 of the drawings there is shown an alternative form of construction of the control knob of Fig. 1, in which the
body 1 thereof is provided with an internal, diametrically formedbar 19, thetop 20 of which is provided with integrally formed 'living hinges' 21 which connect theflaps 2 to thebar 19, thereby dispensing with thespindle 9 and spring 7 of the control knob of Fig. 1. The operation of the control knob of Fig. 9 is identical to that of Fig. 1. - In Figs. 10 to 12 of the accompanying drawings there is shown an alternative form of construction of the control knob of Fig. 1 in which the
flaps 2, instead of being pivoted along their straight edges are provided with tangentially disposedouter pivots 23 which, when theflaps 2 are deflected inwards permits access to a diametrically disposedcentral bar 24 which forms a finger grip for the control knob. - As can be seen from Fig. 11, the
flaps 2 are provided with a tangentially disposedflange 25 having a throughbore 26 in which locates apivot pin 27 which slots intogrooves 28 in thebody 1 of the control knob. In order to maintain theflaps 2 in their normal 'flush' position, they are each provided with an angled leaf-spring element 29 alower part 30 of which slides intoopposed slots 32 in thebody 1 of the control knob, and anupper part 31 of which locates under therespective flap 2 to bias it in the 'flush' position but which enables it to be deflected inwards as required to provide access to thefinger grip bar 24. - As shown in Fig. 12, the control knob may be mounted on a
control spindle 9 and may be located in a hole in afascia plate 12.
Claims (11)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8529534 | 1985-11-30 | ||
GB858529534A GB8529534D0 (en) | 1985-11-30 | 1985-11-30 | Control knobs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0229472A1 EP0229472A1 (en) | 1987-07-22 |
EP0229472B1 true EP0229472B1 (en) | 1990-05-02 |
Family
ID=10589052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860309255 Expired EP0229472B1 (en) | 1985-11-30 | 1986-11-27 | Control knob |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0229472B1 (en) |
DE (1) | DE3670916D1 (en) |
GB (1) | GB8529534D0 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622317B1 (en) * | 1987-10-27 | 1991-10-11 | Ciapem | ROTARY BUTTON WITH SURFACE ARM FOR ROTATION DRIVE OF A AXIS OF A DEVICE |
GB2213914B (en) * | 1987-12-22 | 1992-04-22 | Glynwed Consumer & Building | Improvements relating to control knobs for gas and electrical appliances. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3066550A (en) * | 1960-06-20 | 1962-12-04 | Whirlpool Co | Home appliance control element |
GB2109535B (en) * | 1981-11-06 | 1985-01-03 | Thorn Gas Appliances Limited | A control knob |
GB2157800B (en) * | 1984-04-17 | 1987-07-15 | Hoover Plc | Rotary control |
-
1985
- 1985-11-30 GB GB858529534A patent/GB8529534D0/en active Pending
-
1986
- 1986-11-27 EP EP19860309255 patent/EP0229472B1/en not_active Expired
- 1986-11-27 DE DE8686309255T patent/DE3670916D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB8529534D0 (en) | 1986-01-08 |
EP0229472A1 (en) | 1987-07-22 |
DE3670916D1 (en) | 1990-06-07 |
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Owner name: CREDA LIMITED |
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