EP0229472B1 - Control knob - Google Patents

Control knob Download PDF

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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
Application number
EP19860309255
Other languages
German (de)
French (fr)
Other versions
EP0229472A1 (en
Inventor
Robert Lindsay Quinn
Donald Clifford Bayley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creda Ltd
Original Assignee
Creda Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Creda Ltd filed Critical Creda Ltd
Publication of EP0229472A1 publication Critical patent/EP0229472A1/en
Application granted granted Critical
Publication of EP0229472B1 publication Critical patent/EP0229472B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00Stoves or ranges for gaseous fuels
    • F24C3/12Arrangement or mounting of control or safety devices
    • F24C3/124Control panels
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05GCONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/08Controlling members for hand actuation by rotary movement, e.g. hand wheels
    • G05G1/087Controlling 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 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. As an alternative to using holes 6, 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. Between the flap members 4 and on the pivot pin 5 is disposed 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.
  • In 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, 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 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. When the finger and thumb are removed, the flap 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 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.
  • Although, as described in relation to Figs. 2 and 3, the 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.
  • 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, the flap 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 the body 1 and on which is provided numerical 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 the body 1 and flush with the flaps 2 and on which is provided numerical information 18.
  • Although in Figs. 5 and 6 and Figs. 7 and 8 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.
  • 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 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.
  • 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 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.
  • As can be seen from Fig. 11, 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. In order to maintain the flaps 2 in their normal 'flush' position, 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.
  • As shown in Fig. 12, the control knob may be mounted on a control spindle 9 and may be located in a hole in a fascia plate 12.

Claims (11)

1. A control knob comprising a body to be manipulated by an operator, the body providing a connection to a control device, flap means mounted on the body to form a flat frontal surface for the body, the flap means being pivotable to afford a finger grip for the body, characterised in that the flap means comprises a pair of laterally disposed flap members (2) which are pivotable relative to the body (1) and which are spring biased (7) so that they normally lie substantially in the same plane, the flap members (2) being rotatable against the spring bias to afford a finger grip portion by means of which the control knob may be operated.
2. A control knob as claimed in claim 1, in which the flap members (2) are of generally semi-circular shape, and are pivotable along the straight edges thereof.
3. A control knob as claimed in claim 2, having a generally diametrically disposed pivot (5) for pivoting the flap members (2), and spring means (7) disposed between the flap members (2) for biasing them so that they lie substantially in the same plane.
4. A control knob claimed in claim 2, having a generally diametrically disposed bar member (19) to which the flap members (2) are pivotally attached by integrally formed hinges (21).
5. A control knob as claimed in claim 3 or claim 4, in which the flap members (2) are rotatable and together afford the finger grip portion of said control knob.
6. A control knob as claimed in claim 1, in which the flap members (2) are of generally semi-circular shape, and are provided with generally tangentially disposed pivots (27) on their outer periphery.
7. A control knob as claimed in claim 6, in which the flap members (2) are rotatable to afford access to a centrally disposed member (24) which constitutes the finger grip portion of said control knob.
8. A control knob as claimed in any preceding claim, in which the body (1) has a generally circular opening in which said flap members (20) are located.
9. A control knob as claimed in claim 8, in which the body (1) is adapted to co-operate with the spindle (13) of a control device (10), whereby rotation of said spindle (13) may be effected.
10. A control knob as claimed in claim 8 or claim 9, in which the body (1) is provided around its periphery with an information carrying skirt (15, 17).
EP19860309255 1985-11-30 1986-11-27 Control knob Expired EP0229472B1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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