EP0938733B1 - Two-piece control panel used for electrical household appliances - Google Patents

Two-piece control panel used for electrical household appliances Download PDF

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Publication number
EP0938733B1
EP0938733B1 EP97946230A EP97946230A EP0938733B1 EP 0938733 B1 EP0938733 B1 EP 0938733B1 EP 97946230 A EP97946230 A EP 97946230A EP 97946230 A EP97946230 A EP 97946230A EP 0938733 B1 EP0938733 B1 EP 0938733B1
Authority
EP
European Patent Office
Prior art keywords
control panel
welding
providing
household appliances
electrical household
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 - Lifetime
Application number
EP97946230A
Other languages
German (de)
French (fr)
Other versions
EP0938733A1 (en
Inventor
S. Korkut Avci
Semsettin Eksert
Zülfikar BEKAR
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP0938733A1 publication Critical patent/EP0938733A1/en
Application granted granted Critical
Publication of EP0938733B1 publication Critical patent/EP0938733B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4293—Arrangements for programme selection, e.g. control panels; Indication of the selected programme, programme progress or other parameters of the programme, e.g. by using display panels
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12—Casings; Tubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/18—Aesthetic features

Definitions

  • the present invention is related to the two-piece control panel particularly used in such electrical household appliances as washing machines, dish washers and refrigerators.
  • control panels of the electrical household appliances such as washing machines and dish washers are commonly produced mainly in two types.
  • the control panel consists of one piece.
  • the detail structures that hold the components and provide the connection with the components are prepared by plastic piece injection at the back side of the control panel and taken out of the one-piece plastic panel structure.
  • This application leads to unwanted traces and recesses appearing on the front side of the panel and therefore damages the aesthetic appearance of the front face as a smooth surface sheen cannot be obtained.
  • the wall thickness of the plastic material used in the construction of the panel is increased which in turn causes a substantial increase in the production cast.
  • the second type of control panels consists of two pieces.
  • the front surface of the plastic part forming the panel is made in the shape of a concave basin, and the details holding the components, buttons etc. are placed on this surface.
  • this part of the panel is generally covered by another piece made of a higher-quality surface material which is provided with openings for the buttons and other functional regions that have to be exposed.
  • a control panel formed by this method is first of all relatively expensive because of the front piece which is made of high-quality material and since it does not have the desired strength to with stand and the torsion and tensile forces created at the doors of the dishwashers wherein the control panel is mounted on the mobile loading port, generally a metal support piece is used in the assembly in order to increase the endurance strength of the plastic parts assembled at the control panel. Furthermore, in case the flat plate used for the front surface is made of a painted or printed transparent material, the lights on the panel may create unwanted shades from aesthetic point of view-. Cleaning the dirt and dust accumulated in the gaps around the edges of the front plate and around the openings on its surface. creates problems for the users.
  • control panel In systems with fixed panels, such as in the case of washing machines, the control panel may be made of two pieces, however in practice these pieces engage to each other by means of lugs.
  • the object of the present invention is to realize a two piece control panel that minimises the tolerance deviations that may arise between the component holding structures and electrical components during assembly process and provides facility in assembly; and that shows the desired strength (resistance) against the torsional and tensile forces created particularly at the mobile ports of the dish washers during usage.
  • Another object of the invention is to realize in an economic and cost saving manner, a control panel consisting of two separate plastic parts, that increases the aesthetic appearance quality of the front face and that can be formed in such a manner that it allows model changes eliminating the obligation to modify the moulds.
  • the two-piece control panel realized to achieve the objects of the invention is shown in the attached drawing wherein external view of the shell part (1) forming the visible surface of the panel according to the present invention and the back (rear) part (2) providing the connection with the components are shown.
  • the two piece control panel of the invention consists of two separate plastic parts formed so that they can be joined by vibro-welding in order to provide the structural strength of the panel as a whole.
  • the shell (1) is the visible part providing the aesthetic appearance of the control panel.
  • no detail structure that may cause unwanted traces or recesses on the front surface are formed on the rear unseen surface of this part.
  • the front surface of the control panel is provided with the desired quality of smoothness and brightness.
  • the back part (2) of the panel comprises component holders and functional structures (2b) placed in separate partitions in order to provide the connection with all components.
  • the shell (1) and the back (rear) piece (2) are welded together by using vibro-welding method all along their peripheral edges and at welding details (1a and 2a) formed at various partitions where the components are to be connected and thus it becomes a unitary part.
  • Welding details (1a and 2a) are the structural projections that provide the joining of two parts by melting during vibro-welding. These projections are formed particularly at such areas that are frequently exposed to tension and stress, for instance at the handles of the dish washer loading ports; and their number, shapes and lengths may be variable.
  • the vibro-welding method that provides a homogeneous joining of a plastic structure also provides a control panel body which is resistant against torsions and tensions as a monobloc body after the assembly process is completed.
  • the parts can be assembled within accurate limits and thus tolerance deviations can be minimized.
  • the back part (2) can be prepared so as to comprise the structural details required for its conformity to the future model modifications. When a model modification is considered, it can be realized only by changing the locations and numbers of the openings on the shell (1) without any need to use a new mould.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Casings For Electric Apparatus (AREA)
  • Laminated Bodies (AREA)
  • Push-Button Switches (AREA)
  • Cookers (AREA)
  • Refrigerator Housings (AREA)

Abstract

The present invention is related to the two-piece control panel particularly used in such electrical household appliances as washing machines, dish washers and refrigerators. The control panel according to the invention, consisting of two separate plastic parts connected to each other by welding, one part being the shell (1) that is the visible part providing the aesthetic appearance of the panel, and the second being a rear (back) part (2) providing connection with all components, shows the desired strength and resistance against the torsional and tensile forces created during usage particularly at the mobile loading ports of dish washers and furthermore provides a higher aesthetic appearance quality for the front surface of the control panel in addition to another advantage of providing the realization of model modifications without any requirement to change or renew moulds, in an economical and cost friendly manner.

Description

The present invention is related to the two-piece control panel particularly used in such electrical household appliances as washing machines, dish washers and refrigerators.
The control panels of the electrical household appliances such as washing machines and dish washers are commonly produced mainly in two types. In the first type, the control panel consists of one piece. The detail structures that hold the components and provide the connection with the components are prepared by plastic piece injection at the back side of the control panel and taken out of the one-piece plastic panel structure. This application leads to unwanted traces and recesses appearing on the front side of the panel and therefore damages the aesthetic appearance of the front face as a smooth surface sheen cannot be obtained. In order to avoid this, the wall thickness of the plastic material used in the construction of the panel is increased which in turn causes a substantial increase in the production cast.
The second type of control panels consists of two pieces. The front surface of the plastic part forming the panel is made in the shape of a concave basin, and the details holding the components, buttons etc. are placed on this surface. For aesthetic purposes this part of the panel is generally covered by another piece made of a higher-quality surface material which is provided with openings for the buttons and other functional regions that have to be exposed.
A control panel formed by this method is first of all relatively expensive because of the front piece which is made of high-quality material and since it does not have the desired strength to with stand and the torsion and tensile forces created at the doors of the dishwashers wherein the control panel is mounted on the mobile loading port, generally a metal support piece is used in the assembly in order to increase the endurance strength of the plastic parts assembled at the control panel. Furthermore, in case the flat plate used for the front surface is made of a painted or printed transparent material, the lights on the panel may create unwanted shades from aesthetic point of view-. Cleaning the dirt and dust accumulated in the gaps around the edges of the front plate and around the openings on its surface. creates problems for the users.
As a change in the model of the above mentioned two types of control panels requires substantial modifications to be made in the moulds or new moulds to be used, this change increases the cost. Besides, additional mechanical systems are used in order to keep the tolerance deviations that may arise between the component holding structures and electrical components during the assembly process, at the desired level.
In systems with fixed panels, such as in the case of washing machines, the control panel may be made of two pieces, however in practice these pieces engage to each other by means of lugs.
Although the use of lugs as joining elements provide the panel to stand the vertical forces on its front and back faces, it is not applied for dish washers with mobile ports as it does not give sufficient endurance strength against torsional and tensile forces created on the mobile ports during usage. As a structural unity has not been provided, this type of control panel makes noise as the result of the friction between the two parts during torsion. Another drawback is the wearing and breaking of the lugs in the course of time. A change in the model of this control panel is made possible by the holes opened on the outer part.
The object of the present invention is to realize a two piece control panel that minimises the tolerance deviations that may arise between the component holding structures and electrical components during assembly process and provides facility in assembly; and that shows the desired strength (resistance) against the torsional and tensile forces created particularly at the mobile ports of the dish washers during usage.
Another object of the invention is to realize in an economic and cost saving manner, a control panel consisting of two separate plastic parts, that increases the aesthetic appearance quality of the front face and that can be formed in such a manner that it allows model changes eliminating the obligation to modify the moulds.
The two-piece control panel realized to achieve the objects of the invention is shown in the attached drawing wherein external view of the shell part (1) forming the visible surface of the panel according to the present invention and the back (rear) part (2) providing the connection with the components are shown.
The two piece control panel of the invention consists of two separate plastic parts formed so that they can be joined by vibro-welding in order to provide the structural strength of the panel as a whole. The shell (1) is the visible part providing the aesthetic appearance of the control panel. During plastic part injection, no detail structure that may cause unwanted traces or recesses on the front surface are formed on the rear unseen surface of this part. Thus, the front surface of the control panel is provided with the desired quality of smoothness and brightness. Whereas the back part (2) of the panel comprises component holders and functional structures (2b) placed in separate partitions in order to provide the connection with all components. The shell (1) and the back (rear) piece (2) are welded together by using vibro-welding method all along their peripheral edges and at welding details (1a and 2a) formed at various partitions where the components are to be connected and thus it becomes a unitary part. Welding details (1a and 2a) are the structural projections that provide the joining of two parts by melting during vibro-welding. These projections are formed particularly at such areas that are frequently exposed to tension and stress, for instance at the handles of the dish washer loading ports; and their number, shapes and lengths may be variable.
The vibro-welding method that provides a homogeneous joining of a plastic structure also provides a control panel body which is resistant against torsions and tensions as a monobloc body after the assembly process is completed. The parts can be assembled within accurate limits and thus tolerance deviations can be minimized.
The back part (2) can be prepared so as to comprise the structural details required for its conformity to the future model modifications. When a model modification is considered, it can be realized only by changing the locations and numbers of the openings on the shell (1) without any need to use a new mould.
In this way the cost of changing the model may be kept at lower levels.

Claims (3)

  1. A two-piece control panel used for electrical household appliances characterized in that it consists of two separate plastic parts connected to each other by welding, one part being the shell (1) that is the visible part providing the aesthetic appearance of the panel, and the second being a rear (back) part (2) providing connection with all components.
  2. A control panel according to claim 1 characterized in that the welding method used to join the above mentioned two separate plastic parts is vibro-welding.
  3. A control panel according to claims 1 and 2, characterized with welding details (1a and 2a) described as structural projections the numbers, shapes, lengths of which may be different, that are formed all along the joined edges of the shell and back part as well as at the areas where the components are to be connected and that provide the joining of the said two parts by melting during vibro-welding, being particularly placed at the regions that are frequently subject to tensions.
EP97946230A 1996-11-14 1997-11-14 Two-piece control panel used for electrical household appliances Expired - Lifetime EP0938733B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
TR96/00908A TR199600908A2 (en) 1996-11-14 1996-11-14 Two-piece control panel used in electrical household appliances.
TR9600908 1996-11-14
PCT/TR1997/000017 WO1998021727A1 (en) 1996-11-14 1997-11-14 Two-piece control panel used for electrical household appliances

Publications (2)

Publication Number Publication Date
EP0938733A1 EP0938733A1 (en) 1999-09-01
EP0938733B1 true EP0938733B1 (en) 2004-07-21

Family

ID=21620971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97946230A Expired - Lifetime EP0938733B1 (en) 1996-11-14 1997-11-14 Two-piece control panel used for electrical household appliances

Country Status (6)

Country Link
EP (1) EP0938733B1 (en)
AT (1) ATE271712T1 (en)
AU (1) AU5144398A (en)
DE (1) DE69729948T2 (en)
TR (1) TR199600908A2 (en)
WO (1) WO1998021727A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19757809A1 (en) * 1997-12-24 1999-07-08 Aeg Hausgeraete Gmbh Household appliance with a control panel unit
DE19834467A1 (en) * 1998-07-30 1999-10-14 Bosch Gmbh Robert Electronic instrument, especially car stereo
DE19836459C2 (en) * 1998-08-12 2002-11-21 Loh Kg Ritto Werk Door system, in particular door intercom with module units
ES2172371B1 (en) * 1999-09-24 2003-12-16 Bsh Balay Sa FRONT SCREEN FOR AN APPLIANCES.
DE10037250A1 (en) 2000-07-31 2002-02-14 Bsh Bosch Siemens Hausgeraete Control panel for an electrical device
DE20016014U1 (en) * 2000-09-15 2001-10-31 Siemens Ag Housing for a medical, electrical and / or electronic device
DE10118715A1 (en) * 2001-04-12 2002-10-17 Andreas Peiker handset
AU2003256320A1 (en) * 2002-03-22 2003-10-08 Arcelik A.S. A domestic appliance
DE102011007870A1 (en) * 2011-04-21 2012-10-25 BSH Bosch und Siemens Hausgeräte GmbH Appliance door for a household appliance and household appliance
USD914071S1 (en) 2018-11-02 2021-03-23 Esab Ab Welding device enclosure

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7439122U (en) * 1974-11-23 1975-08-28 Bosch Siemens Hausgeraete Gmbh Arrangement of operating and / or display elements for electrically operated devices, in particular refrigerators or freezers
FR2582578A1 (en) * 1985-05-31 1986-12-05 Hamon Henri Composite panel, in particular for making electrical pannels

Also Published As

Publication number Publication date
DE69729948D1 (en) 2004-08-26
WO1998021727A1 (en) 1998-05-22
DE69729948T2 (en) 2005-07-28
ATE271712T1 (en) 2004-08-15
AU5144398A (en) 1998-06-03
EP0938733A1 (en) 1999-09-01
TR199600908A2 (en) 1998-06-22

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