WO2012011007A1 - Front-loading washing machine door and washing machine with said door - Google Patents

Front-loading washing machine door and washing machine with said door Download PDF

Info

Publication number
WO2012011007A1
WO2012011007A1 PCT/IB2011/052992 IB2011052992W WO2012011007A1 WO 2012011007 A1 WO2012011007 A1 WO 2012011007A1 IB 2011052992 W IB2011052992 W IB 2011052992W WO 2012011007 A1 WO2012011007 A1 WO 2012011007A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
washing machine
door frame
loading washing
machine according
Prior art date
Application number
PCT/IB2011/052992
Other languages
French (fr)
Inventor
Angel Caudevilla De Sola
Elena Cortes Perez
Carlos Lopez Palacios
Alberto Romeo Carnicero
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EA201390103A priority Critical patent/EA022017B1/en
Priority to EP11743637.8A priority patent/EP2596160B1/en
Priority to PL11743637T priority patent/PL2596160T3/en
Priority to CN201180035553.5A priority patent/CN103025947B/en
Publication of WO2012011007A1 publication Critical patent/WO2012011007A1/en

Links

Classifications

    • 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
    • D06F39/14—Doors or covers; Securing means therefor

Definitions

  • the invention relates to the field front-loading washing machine doors that have a door frame, a concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door, and to the field of front-loading washing machines that are closed with doors according to the invention.
  • Document WO 2009/1 1251 1 A1 describes a front-loading washer door that has a door frame, a glass concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door.
  • Document ES 223520 Y describes a door for front-loading washing machines formed as a single piece of one kind of transparent material.
  • the door has an annular portion located on the outside of the machine chassis and a concave zone that projects toward the inside of the machine. Once the door has been manufactured, the annular zone undergoes surface etching on one or both sides of said zone to conceal the mechanical parts that support and lock the circular door.
  • the case of said model also mentions the possibility of leaving the assembly transparent so that technical components are visible from the outside, thereby achieving a certain "mechanical" effect that could be esthetically pleasing. Therefore, we see this door, like the one proposed by the search term, as having neither a frame nor a molding, and optionally completely transparent.
  • the door is formed integrally with the closure element and the element for fastening the hinge.
  • a door for washers of simplified construction similar to the previous one is the one described in document GB 941 134 A.
  • Said door is made from a single piece of transparent plastic and afterward the outer ring undergoes a treatment that makes it opaque so that only the central circle remains transparent.
  • both the hinge and the handle are molded integrally with the door in the fabrication process.
  • Document ES 1015460 U describes a door for washers and dryers in which the frame is omitted with the door consisting solely of a transparent cupped element, which can be of glass or plastic, and a molding (referred to in the case as a decorative frame) of a plastic material that encircles the edge of the cupped element along its entire perimeter.
  • This element can be molded directly straddling the edge of the cup-shaped element, or be molded separately and subsequently fastened to the edge. It is noted that said molding would be comparable to anti-shock molding to avoid sharp edges and protect the glass.
  • Nothing is mentioned in ES 1015460 U about the type of connection of said window to the hinge and catch elements.
  • the object of the invention is to provide a door for front-loading washing machines with the characteristics of improved energy efficiency, simple manufacture, and reduced costs, and a front-loading washing machine with a door having said characteristics.
  • a front-loading washing machine door comprises a door frame, a concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door, wherein the door frame, the concave element, and the lenticular element are formed as one piece of plastic injected by means of a gas injection process.
  • a door of this type offers an improved configuration with respect to the energy efficiency since the chamber formed by the hollow serves as thermal insulation during high-temperature washing processes.
  • the gas-assisted plastic injection especially with nitrogen, the gas is injected into the molten polymer mass at high pressure, hollows out the central part of the piece and presses the molten material against the mold surface. After the material solidifies, the nitrogen is evacuated from the mold cavity.
  • the result is a door with better characteristics than those of a solid door.
  • the door is lighter with practically the same strength, plastic material is conserved, production cycles are shorter due to faster cooling, the resulting door does not contain any marks due to shrinkage cavities in the locations where material accumulates, and greater precision in the door dimensions is obtained.
  • the door may have inserts of another material that are embedded in the plastic of the door.
  • the inserts are preferably metal or ceramic and made so that the elements requiring them in order to function will fit thereon.
  • a recess may likewise be formed in the rear face in which, for example, a hinge element of a hinge assembly can be inserted.
  • One way to fasten the hinge assembly comprises locating the centerline of the hinge (the part corresponding to the knuckles) within the door frame and covering it afterward with a small cap. The rest of the hinge may be connected to the front panel of the washer.
  • another way to mount the hinge is by means of a hinge on both sides comprising a movable hinge leaf and a fixed hinge leaf connected by means of a hinge pin.
  • the movable hinge leaf could be mounted on the door and the fixed one on the panel.
  • a vertical hinge pin would be the connecting element, and at the same time the axis of rotation of the hinge assembly.
  • the hollow defined by the concave element and the lenticular element can also extend through at least part of the interior of the door frame, making it much lighter.
  • the handle is made integrally with the door during the same injection process, for which a catch or an insert formed as a catch is provided, embedded in and projecting from the rear face of the door frame. In this manner, the manufacture of the door is greatly simplified.
  • the door can be made from a transparent plastic to make the inside of the washer drum visible.
  • a transparent plastic to make the inside of the washer drum visible.
  • the protecting element can be formed as an ABS plastic ring that is glued, clipped, or welded to the front face of the door frame.
  • a principal advantage of the invention is the integration of several components into one. In this way, decreased door assembly complexity is achieved. Said decreased complexity leads to reduced material costs and, particularly, assembly costs. Consequently, the overall cost of the assembly is lower.
  • An additional advantage is the decrease in both the total investment and in the time and tooling required for molding. Moreover, the energy consumption in the process is much lower.
  • Figure 1 a cross-section of a front-loading washer door
  • Figure 2 a schematic section of a handle set for a washer door.
  • Figure 1 shows a cross-section of a door 1 , which closes the loading door opening of a front-loading washer, formed from a piece of plastic with an interior hollow 5 enclosed by a concave element 3, a lenticular element and a door frame 2.
  • the concave element 3 With the door 1 in the closed position within the machine (not shown), the concave element 3 is introduced through the loading door opening of the machine seating against a rubber gasket of the loading door opening to seal it.
  • the door frame 2 remains on the outside of the washing machine chassis.
  • the door 1 features a handle 61 on a front face 21 of the door frame 2 and an insert
  • the other side of the door 1 features a hinge element 7 fastened by screws to the door frame 2 through its rear face 22.
  • the front face 21 of the door frame 2 is covered by an opaque protecting element 8 that conceals the mechanical elements of the door 1 and at the same time protects it from scratches and chemical attack from, for example, cleaning products used during the washing machine washing process.
  • Figure 2 shows a schematic cross-section of the door frame 2 covered with a protecting element 8 of a door 1 of the invention.
  • a front recess 24 On the front face 21 of the door frame 2 is formed a front recess 24 in which a handle set 6 is assembled.
  • the handle set 6 has a handle 61 that projects from the perimeter of the door, and a catch hook 63 that projects through an opening in the rear face 22 of the door frame 2.
  • the handle set 6 can rotate on a shaft connected to some tube-shaped inserts (not shown) embedded in the plastic of the door frame 2 in which it can rotate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Securing Of Glass Panes Or The Like (AREA)

Abstract

The invention relates to a door of a front-loading washing machine comprising a door frame 2, a concave element 3 with an edge 31 connected with the door frame, and a lenticular element 4 that closes the concavity formed by the concave element forming a hollow 5 in the door 1. The door frame 2, the concave element 3 and the lenticular element 4 are made as a single piece of plastic injected by means of a gas injection process.

Description

FRONT-LOADING WASHING MACHINE DOOR AND WASHING
MACHINE WITH SAID DOOR
The invention relates to the field front-loading washing machine doors that have a door frame, a concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door, and to the field of front-loading washing machines that are closed with doors according to the invention.
Document WO 2009/1 1251 1 A1 describes a front-loading washer door that has a door frame, a glass concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door.
Document ES 223520 Y describes a door for front-loading washing machines formed as a single piece of one kind of transparent material. The door has an annular portion located on the outside of the machine chassis and a concave zone that projects toward the inside of the machine. Once the door has been manufactured, the annular zone undergoes surface etching on one or both sides of said zone to conceal the mechanical parts that support and lock the circular door. The case of said model also mentions the possibility of leaving the assembly transparent so that technical components are visible from the outside, thereby achieving a certain "mechanical" effect that could be esthetically pleasing. Therefore, we see this door, like the one proposed by the search term, as having neither a frame nor a molding, and optionally completely transparent. The door is formed integrally with the closure element and the element for fastening the hinge.
A door for washers of simplified construction similar to the previous one is the one described in document GB 941 134 A. Said door is made from a single piece of transparent plastic and afterward the outer ring undergoes a treatment that makes it opaque so that only the central circle remains transparent. In this case, both the hinge and the handle are molded integrally with the door in the fabrication process.
Document ES 1015460 U describes a door for washers and dryers in which the frame is omitted with the door consisting solely of a transparent cupped element, which can be of glass or plastic, and a molding (referred to in the case as a decorative frame) of a plastic material that encircles the edge of the cupped element along its entire perimeter. This element can be molded directly straddling the edge of the cup-shaped element, or be molded separately and subsequently fastened to the edge. It is noted that said molding would be comparable to anti-shock molding to avoid sharp edges and protect the glass. Nothing is mentioned in ES 1015460 U about the type of connection of said window to the hinge and catch elements.
The object of the invention is to provide a door for front-loading washing machines with the characteristics of improved energy efficiency, simple manufacture, and reduced costs, and a front-loading washing machine with a door having said characteristics.
This object is achieved as defined in the independent claims attached. Preferred embodiments of the invention are apparent from dependent claims or the subsequent disclosure.
According to the invention, a front-loading washing machine door comprises a door frame, a concave element with an edge connected to the door frame, and a lenticular element that closes the concavity formed by the concave element forming a hollow in the door, wherein the door frame, the concave element, and the lenticular element are formed as one piece of plastic injected by means of a gas injection process.
A door of this type offers an improved configuration with respect to the energy efficiency since the chamber formed by the hollow serves as thermal insulation during high-temperature washing processes. Moreover, in the gas-assisted plastic injection, especially with nitrogen, the gas is injected into the molten polymer mass at high pressure, hollows out the central part of the piece and presses the molten material against the mold surface. After the material solidifies, the nitrogen is evacuated from the mold cavity. The result is a door with better characteristics than those of a solid door. The door is lighter with practically the same strength, plastic material is conserved, production cycles are shorter due to faster cooling, the resulting door does not contain any marks due to shrinkage cavities in the locations where material accumulates, and greater precision in the door dimensions is obtained.
To fasten the door to the washing machine chassis, to fasten a handle set, or to incorporate any element into the door, it may have inserts of another material that are embedded in the plastic of the door. The inserts are preferably metal or ceramic and made so that the elements requiring them in order to function will fit thereon.
According to a preferred embodiment of the invention, it is possible to assemble a handle set directly onto the front face of the door frame, or in the frontal recess made for this purpose in the front face of the door frame, with a handle and with a catch that projects through the rear face of the door frame.
According to another preferred embodiment of the invention, a recess may likewise be formed in the rear face in which, for example, a hinge element of a hinge assembly can be inserted. One way to fasten the hinge assembly comprises locating the centerline of the hinge (the part corresponding to the knuckles) within the door frame and covering it afterward with a small cap. The rest of the hinge may be connected to the front panel of the washer.
According to an alternative preferred embodiment of the invention, another way to mount the hinge is by means of a hinge on both sides comprising a movable hinge leaf and a fixed hinge leaf connected by means of a hinge pin. The movable hinge leaf could be mounted on the door and the fixed one on the panel. A vertical hinge pin would be the connecting element, and at the same time the axis of rotation of the hinge assembly.
According to a further preferred embodiment of the invention, the hollow defined by the concave element and the lenticular element can also extend through at least part of the interior of the door frame, making it much lighter.
In another preferred embodiment of the invention, the handle is made integrally with the door during the same injection process, for which a catch or an insert formed as a catch is provided, embedded in and projecting from the rear face of the door frame. In this manner, the manufacture of the door is greatly simplified.
According to yet another preferred embodiment of the invention, the door can be made from a transparent plastic to make the inside of the washer drum visible. To make it stronger or fit more attractively into the machine, provision is made for at least part of the front face of the door frame to be covered by means of a protecting element that is resistant to scratches and/or chemical products. Moreover, the protecting element can be formed as an ABS plastic ring that is glued, clipped, or welded to the front face of the door frame.
A principal advantage of the invention is the integration of several components into one. In this way, decreased door assembly complexity is achieved. Said decreased complexity leads to reduced material costs and, particularly, assembly costs. Consequently, the overall cost of the assembly is lower. An additional advantage is the decrease in both the total investment and in the time and tooling required for molding. Moreover, the energy consumption in the process is much lower.
Other advantages are brought out in the following description of the Figures of the attached drawing. A preferred embodiment of the invention is shown in the Figures. The Figures, the description and the claims contain combinations of numerous characteristics. Any person skilled in the art could advantageously also consider the characteristics individually and recombine them in other reasonable combinations without departing from the scope of the invention. In particular, the drawing shows:
Figure 1 a cross-section of a front-loading washer door, and
Figure 2 a schematic section of a handle set for a washer door.
Figure 1 shows a cross-section of a door 1 , which closes the loading door opening of a front-loading washer, formed from a piece of plastic with an interior hollow 5 enclosed by a concave element 3, a lenticular element and a door frame 2. With the door 1 in the closed position within the machine (not shown), the concave element 3 is introduced through the loading door opening of the machine seating against a rubber gasket of the loading door opening to seal it. The door frame 2 remains on the outside of the washing machine chassis.
The door 1 features a handle 61 on a front face 21 of the door frame 2 and an insert
62 that serves as a catch 62 embedded in the plastic of the door frame 2 projecting from the rear face 22 opposite the handle. The other side of the door 1 features a hinge element 7 fastened by screws to the door frame 2 through its rear face 22. The front face 21 of the door frame 2 is covered by an opaque protecting element 8 that conceals the mechanical elements of the door 1 and at the same time protects it from scratches and chemical attack from, for example, cleaning products used during the washing machine washing process.
Figure 2 shows a schematic cross-section of the door frame 2 covered with a protecting element 8 of a door 1 of the invention. On the front face 21 of the door frame 2 is formed a front recess 24 in which a handle set 6 is assembled. The handle set 6 has a handle 61 that projects from the perimeter of the door, and a catch hook 63 that projects through an opening in the rear face 22 of the door frame 2. The handle set 6 can rotate on a shaft connected to some tube-shaped inserts (not shown) embedded in the plastic of the door frame 2 in which it can rotate.
Reference Numerals
1 Door
2 Door frame
21 Front face
22 Rear face
24 Front recess
3 Concave element
31 Edge
4 Lenticular element
5 Hollow
6 Handle set
61 Handle
62 Inserts
63 Catch
7 Hinge element
8 Protecting element

Claims

Door of a front-loading washing machine comprising a door frame (2), a concave element (3) with an edge (31 ) connected with the door frame, and a lenticular element (4), which closes the concavity formed by the concave element, thereby forming a hollow (5) on the door (1 ), characterized in that the door frame (2), the concave element (3) and the lenticular element (4) are made in a piece of plastic injected by means of a gas injection process.
Door of a front-loading washing machine according to claim 1 , characterized in that inserts (62) of another material may be embedded into the plastic of the door.
Door of a front-loading washing machine according to one of the preceding claims, characterized in that the door frame (2), on its front face (21 ), has a frontal recess (24) to assemble a handle-set (6) and/or, on its rear face (22), a rear recess to assemble the element hinge (7).
Door of a front-loading washing machine according to one of the preceding claims, characterized in that the hollow (5) extends at least over a part of the interior of the door frame (2).
Door of a front-loading washing machine according to claim 1 or 2, characterized in that a handle (61 ) is made in one piece with the door (1 ).
Door of a front-loading washing machine according to claim 5, characterized in that an insert (62) made as a latch is embedded projecting from the rear face (22) of the door frame (2).
Door of a front-loading washing machine according to one of the preceding claims, characterized in that the plastic is a transparent plastic.
8. Door of a front-loading washing machine according to one of the preceding claims, characterized in that at least part of the front face (21 ) of the door frame (2) is coated by a scratch-proof and/or chemical-resistant protecting element (8).
9. Door of a front-loading washing machine according to claim 8, characterized in that the protecting element (8) is of ABS plastic.
10. Front-loading washing machine with a door (1 ) comprising a door frame (2), a concave element (3) with an edge (31 ) connected with the door frame, and a lenticular element (4), which closes the concavity formed by the concave element, thereby forming a hollow (5) on the door (1 ), characterized in that the door frame (2), the concave element (3) and the lenticular element (4) are made in a piece of plastic injected by means of a gas injection process.
PCT/IB2011/052992 2010-07-22 2011-07-06 Front-loading washing machine door and washing machine with said door WO2012011007A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EA201390103A EA022017B1 (en) 2010-07-22 2011-07-06 Front-loading washing machine door and washing machine with said door
EP11743637.8A EP2596160B1 (en) 2010-07-22 2011-07-06 Front-loading washing machine door and washing machine with said door
PL11743637T PL2596160T3 (en) 2010-07-22 2011-07-06 Front-loading washing machine door and washing machine with said door
CN201180035553.5A CN103025947B (en) 2010-07-22 2011-07-06 Front loading washing machine door and the washing machine with described door

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201031136 2010-07-22
ES201031136A ES2397888B1 (en) 2010-07-22 2010-07-22 DOOR OF FRONT LOAD WASHING MACHINE AND WASHING MACHINE WITH SUCH DOOR

Publications (1)

Publication Number Publication Date
WO2012011007A1 true WO2012011007A1 (en) 2012-01-26

Family

ID=44513011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/052992 WO2012011007A1 (en) 2010-07-22 2011-07-06 Front-loading washing machine door and washing machine with said door

Country Status (6)

Country Link
EP (1) EP2596160B1 (en)
CN (1) CN103025947B (en)
EA (1) EA022017B1 (en)
ES (1) ES2397888B1 (en)
PL (1) PL2596160T3 (en)
WO (1) WO2012011007A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017174295A1 (en) * 2016-04-08 2017-10-12 BSH Hausgeräte GmbH Domestic appliance having a recessed grip
TWI807076B (en) * 2018-08-02 2023-07-01 日商夏普股份有限公司 front load washing machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106222939A (en) * 2016-08-31 2016-12-14 无锡小天鹅股份有限公司 Door body assembly and roller washing machine for roller washing machine
US10132021B2 (en) 2016-09-02 2018-11-20 Whirlpool Corporation Laundry treating appliance door assembly comprising a plastic fishbowl
DE102018210860A1 (en) 2018-07-02 2020-01-02 BSH Hausgeräte GmbH Laundry care appliance with an appliance door

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941134A (en) 1960-03-14 1963-11-06 Ass Elect Ind Improvements relating to domestic washing and like equipment
DE2430864A1 (en) * 1974-03-15 1975-09-25 Merloni S P A WINDOW FOR WASHING MACHINES
ES1015460U (en) 1989-10-23 1991-07-16 Centro Sviluppo Settori Impiego S.R.L. Window for appliances. (Machine-translation by Google Translate, not legally binding)
EP2050860A2 (en) * 2007-10-18 2009-04-22 Panasonic Corporation Drum type washing machine
WO2009112511A1 (en) 2008-03-12 2009-09-17 BSH Bosch und Siemens Hausgeräte GmbH Cover for an inspection glass of a washer and/or dryer door, washer and/or dryer door comprising a cover for an inspection glass, and washer and/or dryer comprising a door that has a cover for an inspection glass

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005517477A (en) * 2002-02-14 2005-06-16 エルジー エレクトロニクス インコーポレーテッド Washing machine door and manufacturing method thereof
DE102005058898B3 (en) * 2005-12-09 2006-12-07 BSH Bosch und Siemens Hausgeräte GmbH Closing door for a horizontal axis front loading washing machine or drier has single axis hinge and arrangement to receive hinge part into recess in housing to give planar front surface

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941134A (en) 1960-03-14 1963-11-06 Ass Elect Ind Improvements relating to domestic washing and like equipment
DE2430864A1 (en) * 1974-03-15 1975-09-25 Merloni S P A WINDOW FOR WASHING MACHINES
ES223520Y (en) 1974-03-15 1977-04-16 TRANSPARENT DOOR FOR WASHING MACHINE.
ES1015460U (en) 1989-10-23 1991-07-16 Centro Sviluppo Settori Impiego S.R.L. Window for appliances. (Machine-translation by Google Translate, not legally binding)
EP2050860A2 (en) * 2007-10-18 2009-04-22 Panasonic Corporation Drum type washing machine
WO2009112511A1 (en) 2008-03-12 2009-09-17 BSH Bosch und Siemens Hausgeräte GmbH Cover for an inspection glass of a washer and/or dryer door, washer and/or dryer door comprising a cover for an inspection glass, and washer and/or dryer comprising a door that has a cover for an inspection glass

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017174295A1 (en) * 2016-04-08 2017-10-12 BSH Hausgeräte GmbH Domestic appliance having a recessed grip
RU2692496C1 (en) * 2016-04-08 2019-06-25 Бсх Хаусгерете Гмбх Home appliance with recessed handle
TWI807076B (en) * 2018-08-02 2023-07-01 日商夏普股份有限公司 front load washing machine

Also Published As

Publication number Publication date
PL2596160T3 (en) 2016-07-29
CN103025947A (en) 2013-04-03
CN103025947B (en) 2016-04-20
ES2397888R1 (en) 2013-04-12
ES2397888B1 (en) 2014-02-11
EP2596160A1 (en) 2013-05-29
EA022017B1 (en) 2015-10-30
EA201390103A1 (en) 2013-07-30
EP2596160B1 (en) 2016-01-27
ES2397888A2 (en) 2013-03-12

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