EP2159316A1 - Laundry washing machine - Google Patents

Laundry washing machine Download PDF

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Publication number
EP2159316A1
EP2159316A1 EP08163007A EP08163007A EP2159316A1 EP 2159316 A1 EP2159316 A1 EP 2159316A1 EP 08163007 A EP08163007 A EP 08163007A EP 08163007 A EP08163007 A EP 08163007A EP 2159316 A1 EP2159316 A1 EP 2159316A1
Authority
EP
European Patent Office
Prior art keywords
latch element
opening
door
washing machine
lock
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.)
Granted
Application number
EP08163007A
Other languages
German (de)
French (fr)
Other versions
EP2159316B1 (en
Inventor
Roberto Bottosset
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to PL08163007T priority Critical patent/PL2159316T3/en
Priority to ES08163007T priority patent/ES2375531T3/en
Priority to EP08163007A priority patent/EP2159316B1/en
Priority to AT08163007T priority patent/ATE528433T1/en
Priority to PCT/EP2009/005620 priority patent/WO2010022845A1/en
Priority to RU2009132058/12A priority patent/RU2506361C2/en
Publication of EP2159316A1 publication Critical patent/EP2159316A1/en
Application granted granted Critical
Publication of EP2159316B1 publication Critical patent/EP2159316B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12Casings; Tubs
    • D06F39/14Doors or covers; Securing means therefor
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/06Controlling mechanically-operated bolts by electro-magnetically-operated detents
    • E05B47/0696Controlling mechanically-operated bolts by electro-magnetically-operated detents locking the bolt by an electromagnet in the striker
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00Locks or fastenings with special structural characteristics
    • E05B63/24Arrangements in which the fastening members which engage one another are mounted respectively on the wing and the frame and are both movable, e.g. for release by moving either of them
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0084Key or electric means; Emergency release

Definitions

  • the present invention relates to a laundry washing machine.
  • the present invention relates to a front-loading home laundry washing machine, to which the following description refers purely by way of example.
  • front-loading home laundry washing machines generally comprise a substantially parallelepiped-shaped outer box casing resting on the floor; a substantially bell-shaped washing tub which is suspended in floating manner inside the casing, directly facing a laundry loading and unloading opening formed in the front wall of the casing; a door hinged to the front wall of the casing to rotate to and from a closing position in which the door rests completely against the casing to close the opening in the front wall of the casing and watertight seal the washing tub; a revolving drum for housing the laundry to be washed, and which is housed inside the washing tub to rotate about its longitudinal axis; and, finally, an electric motor assembly for rotating the revolving drum about its longitudinal axis inside the washing tub.
  • modern front-loading home laundry washing machines also comprise a manually-operated door lock device designed to selectively lock the door to the machine casing when the door is in the closing position, and an electrically-operated safety lock device designed to selectively prevent the manually-operated door lock device from releasing the door from the machine casing when the revolving drum is rotating and/or the washing tub is filled with water.
  • the manually-operated door lock device consists of a hooked catch element or lever which projects from the outer frame of the door towards the front face of the machine casing, and is hinged to the door frame so as to enter into a corresponding through opening formed in the front wall of the machine casing, next to the laundry loading and unloading opening, and there firmly engage the machine casing; a torsion spring designed to keep the hooked catch element in a position substantially perpendicular to the plane of the door frame, so that the distal end of the catch element rests on the edge of the machine casing; and of a door handle connected mechanically to the hooked catch element to allow the user to tilt the hooked catch element manually to release the distal end of the catch element from the machine casing.
  • the electrically-operated safety lock device is fixed to the front wall of the machine casing, inside the casing, is substantially aligned with the through opening in the front wall, and comprises a plate-like latch element fitted in axially sliding manner to a supporting frame fixed rigidly to the machine casing.
  • the latch element extends and is movable on a plane substantially tangent to the portion of the front wall of the machine casing where the through opening is formed, and has a second through opening sized to be engaged by the distal end of the hooked catch element.
  • the electrically-operated safety lock device also comprises a spring member designed to keep the latch element in an unlock position in which the through opening in the latch element is substantially aligned with the through opening in the front wall of the machine casing; and a first electrically-operated linear actuator which, on command of the washing machine electronic central control unit, temporarily counteracts the elastic force of the spring member, and moves the latch element, in its plane, from the unlock position to a lock position, in which the latch element engages the hooked catch element like a guillotine to prevent manual tilt of the hooked catch element.
  • the electrically-operated safety lock device also comprises a safety lock pin extending perpendicularly to the latch element lying plane; and a second electrically-operated linear actuator (e.g. a PTC bimetallic thermal switch) for moving the safety lock pin axially on command of the washing machine electronic central control unit.
  • a second electrically-operated linear actuator e.g. a PTC bimetallic thermal switch
  • the latch element body has a through hole which is aligned with the safety lock pin when the latch element is in the lock position preventing manual tilt of the hooked catch element, and the second actuator moves the safety lock pin axially between an extracted position in which the safety lock pin engages the through hole in the latch element body, thus preventing the latch element from returning to the unlock position, and a withdrawn position in which the safety lock pin does not engage the latch element body, thus allowing free movement of the latch.
  • the second actuator moves the safety lock pin into the extracted position when the laundry washing machine starts the washing cycle, thus locking the latch element in the position preventing manual tilt of the hooked catch element, and moves the safety lock pin back into the withdrawn position with a given time delay after the machine completes the washing cycle, or the washing cycle is stopped in advance by the user.
  • the major drawback of the electrically-operated safety lock device described above lies in the fact that, in the event of the safety lock pin accidentally remaining in the extracted position because of electric power failure or mechanical jamming, there is no way of opening the door other than forcing both the manually-operated door lock device and the electrically-operated safety lock device, thus incurring repairing costs.
  • a laundry washing machine as claimed in Claim 1 and preferably, though not necessarily, in any one of the dependent Claims.
  • number 1 indicates as a whole a laundry washing machine comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2 resting on the floor; a substantially bell-shaped washing tub (non shown) suspended in floating manner inside the casing, directly facing a laundry loading and unloading opening 3a formed in a main wall 3 of casing 2; a revolving drum (non shown) for housing the laundry to be washed, and which is housed inside the washing tub to rotate about its longitudinal axis; and a door 4 hinged to main wall 3 of the casing to rotate to and from a closing position in which door 4 rests on the outer face of wall 3 to close opening 3a and watertight seal the washing tub of the washing machine.
  • opening 3a is formed in the flat bottom of a substantially sink-shaped seat 3b formed in the outer face of wall 3, and door 4 is shaped to fit inside seat 3b in the closing position, and to define within seat 3b an annular recess 5 of given width.
  • laundry washing machine 1 is a front-loading washing machine, so opening 3a is formed in the front face of casing 2, and door 4 is hinged in known manner to front wall 3 of the casing to rotate about a preferably, though not necessarily, vertical axis A to and from a closing position ( Figures 2 and 3 ) in which door 4 rests on the bottom of seat 3b to close opening 3a and watertight seal the washing tub of the washing machine.
  • washing machine 1 also comprises a manually-operated door lock device 6 designed to selectively lock door 4 to casing 2 when door 4 rests on the bottom of seat 3b in the closing position; and an electrically-operated safety lock device 7 designed to selectively prevent door lock device 6 from releasing door 4 from casing 2, e.g. when the revolving drum rotates and/or the washing tub is filled with water.
  • a manually-operated door lock device 6 designed to selectively lock door 4 to casing 2 when door 4 rests on the bottom of seat 3b in the closing position
  • an electrically-operated safety lock device 7 designed to selectively prevent door lock device 6 from releasing door 4 from casing 2, e.g. when the revolving drum rotates and/or the washing tub is filled with water.
  • Door lock device 6 comprises a hooked catch element or lever 8 which projects from the outer frame of door 4 towards front wall 3 of casing 2, and enters into a corresponding through opening 9 formed in front wall 3 of casing 2, next to opening 3a. More specifically, hooked catch element 8 is hinged to the frame of door 4 to swing about a transverse axis B preferably, though not necessarily, parallel to vertical axis A, so the hooked distal end 8a of catch element 8 goes beyond front wall 3 through opening 9, and rests onto the inner face of wall 3 to secure door 4 firmly to casing 2.
  • door lock device 6 also comprises a spring element (non shown) designed to keep catch element 8 in a rest position, wherein catch element 8 is substantially perpendicular to plane M of the door frame - i.e. locally perpendicular to the bottom surface of seat 3b - to enable the hooked distal end 8a of catch element 8 to engage the edge of casing 2 defining opening 9; and a door handle 10 which is hinged to the door frame, on the opposite side of plane M with respect to catch element 8, and is mechanically connected to catch element 8 to allow the user to tilt catch element 8 manually to release the hooked distal end 8a of catch element 8 from the edge of front wall 3, i.e. from the edge of casing 2.
  • a spring element non shown
  • safety lock device 7 is fixed to the inner face of front wall 3, i.e. inside machine casing 2, is substantially aligned with through opening 9 in front wall 3, and comprises a preferably, though not necessarily, plate-like latch element 11 fitted in axially sliding manner to a supporting frame 12 rigidly fixed to front wall 3 of machine casing 2.
  • Latch element 11 extends and is movable on a plane W substantially tangent to the flat bottom of seat 3b in front wall 3, and has a preferably, though not necessarily, rectangular through opening 11a sized to be engaged by the distal end 8a of catch element 8.
  • Safety lock device 7 also comprises a spring member 13 which is interposed between frame 12 and latch element 11 and is designed to keep latch element 11 in an unlock position ( Figure 2 ) in which through opening 11a is substantially aligned with through opening 9 in front wall 3, thus allowing free entrance of the hooked distal end 8a into opening 9 and free tilting of catch element 8.
  • through opening 11a of latch element 11 is dimensioned to partially cover, when latch element 11 rests in the unlock position, the through opening 9 in front wall 3, so that the distal end 8a of catch element 8, to cross opening 9, is obliged to move latch element 11 sideways on supporting frame 12 overcoming the elastic force of spring member 13.
  • spring member 13 is designed to be less rigid than the spring element of door lock device 6, so that the spring element of door lock device 6 can counteract the elastic force of spring member 13 when the hooked distal end 8a of catch element 8 crosses through opening 9, and keep catch element 8 in the rest position to enable the hooked distal end 8a of catch element 8 to engage the edge of casing 2.
  • the hooked distal end 8a of catch element 8 when engaged to the edge of casing 2 defining opening 9, the hooked distal end 8a of catch element 8 also moves latch element 11 sideways on plane W from its unlock position to a lock position in which latch element 11 engages catch element 8 in guillotine-fashion, and the release of the hooked distal end 8a of catch element 8 from the edge of front wall 3 is subordinated to the movement of latch element 11 from the lock position ( Figure 3 ) back to the unlock position ( Figure 2 ).
  • safety lock device 7 also comprises a lock pin 15 extending substantially perpendicular to plane W of latch element 11; and an electrically-operated linear actuator 16 for moving lock pin 15 axially on command of the washing machine central control unit or on direct command of the user.
  • the body of latch element 11 has a through lateral notch or a through hole 11b which is aligned with lock pin 15 ( Figure 3 ) when latch element 11 is in the lock position and prevents the manually-operated tilting of hooked catch element 8; and linear actuator 16 moves lock pin 15 axially between an extracted position ( Figure 3 ) in which lock pin 15 engages the lateral notch or hole 11b in the body of latch element 11, thus preventing latch element 11 from returning to the unlock position, and a withdrawn position ( Figure 2 ) in which lock pin 15 does not engage the body of latch element 11, thus allowing free movement of the latch element.
  • Linear actuator 16 is a commonly know washing machine part and therefore not described in detail.
  • front wall 3 of machine casing 2 has, on the bottom of annular recess 5, an additional through hole or slot 17 which is aligned with lock pin 15 of safety lock device 7, and directly communicates with the through hole 11b in latch element 11 ( Figure 3 ) when latch element 11 is in the lock position for preventing manual tilt of catch element 8.
  • through hole 17 in front wall 3 is aligned with lock pin 15, on the opposite side of latch element 11 to lock pin 15.
  • slot 17 may be realized on front wall 3 of machine casing 2, outside of sink-shaped seat 3b, i.e. out of annular recess 5.
  • washing machine 1 also comprises a separate emergency-opening tool 18 (namely, an appropriately sized nail or screwdriver), the tip of which is sized to fit easily through hole 17 into casing 2, to engage the end of lock pin 15 and force the axial displacement of lock pin 15 from the extracted position back into the withdrawn position, and so restore latch element 11 to the unlock position.
  • emergency-opening tool 18 may be replaced by a proper-sized household tool.
  • through hole 17 in front wall 3 allows manual displacement of lock pin 15 from the extracted position to the withdrawn position, thus eliminating repair expenses in the event of lock pin 15 remaining in the extracted position due to electric power failure or mechanical jamming.
  • the hooked distal end 8a of catch element 8 may engage either the supporting frame 12 or directly the latch element 11 of safety lock device 7 for selectively locking door 4 to machine casing 2.
  • laundry loading and unloading opening 3a on front wall 3 may be shaped so as to incorporate through opening 9.
  • catch element 8 enters into opening 3a, near to the opening edge, and safety lock device 7 is fixed to front wall 3 so that latch element 11 partially protrudes directly into the perimeter of opening 3a for being engaged by the distal end 8a of catch element 8.
  • the distal end 8a of catch element 8 may hook on the edge of casing 2 defining opening 9, or on supporting frame 12 of safety lock device 7, or directly on latch element 11 of safety lock device 7.
  • lock pin 15 may have a projecting appendix 15a extending substantially parallel to plane W, so that the distal end of appendix 15a projects from the perimeter of latch element 11.
  • through hole 17 in front wall 3 is aligned with the distal end of appendix 15a, and the tip of emergency-opening tool 18 rests directly on the distal end of appendix 15a to force lock pin 15 axially from the extracted position back into the withdrawn position.
  • emergency-opening tool 18 does not penetrate the body of latch element 11 to reach lock pin 15.
  • safety lock device 7 may comprise a rocker arm 20 which extends substantially parallel to latch plane W, is hinged to supporting frame 12 to swing about a rotation axis locally parallel to plane W, and has a first end aligned with the end of lock pin 15, and a second end aligned with through hole 17 in front wall 3.
  • emergency-opening tool 18 acts on the second end of rocker arm 20, which in turn brings its first end to rest on the end of lock pin 15, and then pushes lock pin 15 back into the withdrawn position.
  • emergency-opening tool 18 may or may not penetrate the body of latch element 11, depending on the shape and position of rocker arm 20 with respect to latch element 11.
  • laundry washing machine 1 may be a top-loading washing machine.
  • opening 3a would be located on the upper face of casing 2; door 4 would be hinged in known manner to the top wall of casing 3 for rotating about an horizontal axis; and safety lock device 7 would be fixed to the inner face of the top wall of casing 2, i.e. inside the machine casing 2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Structural Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A laundry washing machine (1) having a safety lock device (7) being fixed to the first wall (3) aligned with the first opening (9), and having a latch element (11) between an unlock position in which said latch element (11) does not engage the catch element (8), and a lock position in which said latch element (11) engages the catch element (8) fitted into the first through opening (9); the manual release of the door (4) from the machine casing (2) being subordinated to the movement of said latch element (11) from the lock position back to the unlock position and the safety lock device (7) also having an axially movable lock pin (15), which is movable between an extracted position in which the lock pin (15) engages the body of the latch element (11) to prevent the latch element (11) from returning into its unlock position, and a withdrawn position in which the lock pin (15) does not engage the body of the latch element (11) and allows free movement of the latch element (11); the first wall (3) of the casing having a safety through opening (17) by which to insert an emergency-opening tool (18) inside the machine casing (2) to force the lock pin (15) from the extracted position to the withdrawn position.

Description

  • The present invention relates to a laundry washing machine.
  • More specifically, the present invention relates to a front-loading home laundry washing machine, to which the following description refers purely by way of example.
  • As is known, front-loading home laundry washing machines generally comprise a substantially parallelepiped-shaped outer box casing resting on the floor; a substantially bell-shaped washing tub which is suspended in floating manner inside the casing, directly facing a laundry loading and unloading opening formed in the front wall of the casing; a door hinged to the front wall of the casing to rotate to and from a closing position in which the door rests completely against the casing to close the opening in the front wall of the casing and watertight seal the washing tub; a revolving drum for housing the laundry to be washed, and which is housed inside the washing tub to rotate about its longitudinal axis; and, finally, an electric motor assembly for rotating the revolving drum about its longitudinal axis inside the washing tub.
  • In addition to the above, modern front-loading home laundry washing machines also comprise a manually-operated door lock device designed to selectively lock the door to the machine casing when the door is in the closing position, and an electrically-operated safety lock device designed to selectively prevent the manually-operated door lock device from releasing the door from the machine casing when the revolving drum is rotating and/or the washing tub is filled with water.
  • More specifically, in modern front-loading home laundry washing machines, the manually-operated door lock device consists of a hooked catch element or lever which projects from the outer frame of the door towards the front face of the machine casing, and is hinged to the door frame so as to enter into a corresponding through opening formed in the front wall of the machine casing, next to the laundry loading and unloading opening, and there firmly engage the machine casing; a torsion spring designed to keep the hooked catch element in a position substantially perpendicular to the plane of the door frame, so that the distal end of the catch element rests on the edge of the machine casing; and of a door handle connected mechanically to the hooked catch element to allow the user to tilt the hooked catch element manually to release the distal end of the catch element from the machine casing.
  • The electrically-operated safety lock device is fixed to the front wall of the machine casing, inside the casing, is substantially aligned with the through opening in the front wall, and comprises a plate-like latch element fitted in axially sliding manner to a supporting frame fixed rigidly to the machine casing. The latch element extends and is movable on a plane substantially tangent to the portion of the front wall of the machine casing where the through opening is formed, and has a second through opening sized to be engaged by the distal end of the hooked catch element.
  • The electrically-operated safety lock device also comprises a spring member designed to keep the latch element in an unlock position in which the through opening in the latch element is substantially aligned with the through opening in the front wall of the machine casing; and a first electrically-operated linear actuator which, on command of the washing machine electronic central control unit, temporarily counteracts the elastic force of the spring member, and moves the latch element, in its plane, from the unlock position to a lock position, in which the latch element engages the hooked catch element like a guillotine to prevent manual tilt of the hooked catch element.
  • In modern front-loading home laundry washing machines, the electrically-operated safety lock device also comprises a safety lock pin extending perpendicularly to the latch element lying plane; and a second electrically-operated linear actuator (e.g. a PTC bimetallic thermal switch) for moving the safety lock pin axially on command of the washing machine electronic central control unit.
  • More specifically, the latch element body has a through hole which is aligned with the safety lock pin when the latch element is in the lock position preventing manual tilt of the hooked catch element, and the second actuator moves the safety lock pin axially between an extracted position in which the safety lock pin engages the through hole in the latch element body, thus preventing the latch element from returning to the unlock position, and a withdrawn position in which the safety lock pin does not engage the latch element body, thus allowing free movement of the latch.
  • Obviously, the second actuator moves the safety lock pin into the extracted position when the laundry washing machine starts the washing cycle, thus locking the latch element in the position preventing manual tilt of the hooked catch element, and moves the safety lock pin back into the withdrawn position with a given time delay after the machine completes the washing cycle, or the washing cycle is stopped in advance by the user.
  • The major drawback of the electrically-operated safety lock device described above lies in the fact that, in the event of the safety lock pin accidentally remaining in the extracted position because of electric power failure or mechanical jamming, there is no way of opening the door other than forcing both the manually-operated door lock device and the electrically-operated safety lock device, thus incurring repairing costs.
  • It is the aim of the present invention to provide a laundry washing machine designed to eliminate the aforementioned drawbacks posed by the electrically-operated safety lock device.
  • According to the present invention, there is provided a laundry washing machine as claimed in Claim 1 and preferably, though not necessarily, in any one of the dependent Claims.
  • A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
    • Figure 1 shows a front view of a front-loading laundry washing machine in accordance with the teachings of the present invention;
    • Figures 2 and 3 show a section view, with parts removed for clarity, of the door closing system of the Figure 1 laundry washing machine in two different operating configurations;
    • Figure 4 shows a section view, with parts removed for clarity, of a first variation of the Figure 2 and 3 door closing system;
    • Figure 5 shows a section view, with parts removed for clarity, of a second variation of the Figure 2 and 3 door closing system.
  • With reference to Figure 1, number 1 indicates as a whole a laundry washing machine comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2 resting on the floor; a substantially bell-shaped washing tub (non shown) suspended in floating manner inside the casing, directly facing a laundry loading and unloading opening 3a formed in a main wall 3 of casing 2; a revolving drum (non shown) for housing the laundry to be washed, and which is housed inside the washing tub to rotate about its longitudinal axis; and a door 4 hinged to main wall 3 of the casing to rotate to and from a closing position in which door 4 rests on the outer face of wall 3 to close opening 3a and watertight seal the washing tub of the washing machine.
  • More specifically, with reference to Figures 2 and 3, opening 3a is formed in the flat bottom of a substantially sink-shaped seat 3b formed in the outer face of wall 3, and door 4 is shaped to fit inside seat 3b in the closing position, and to define within seat 3b an annular recess 5 of given width.
  • More specifically, in the example shown, laundry washing machine 1 is a front-loading washing machine, so opening 3a is formed in the front face of casing 2, and door 4 is hinged in known manner to front wall 3 of the casing to rotate about a preferably, though not necessarily, vertical axis A to and from a closing position (Figures 2 and 3) in which door 4 rests on the bottom of seat 3b to close opening 3a and watertight seal the washing tub of the washing machine.
  • With reference to Figures 1, 2 and 3, washing machine 1 also comprises a manually-operated door lock device 6 designed to selectively lock door 4 to casing 2 when door 4 rests on the bottom of seat 3b in the closing position; and an electrically-operated safety lock device 7 designed to selectively prevent door lock device 6 from releasing door 4 from casing 2, e.g. when the revolving drum rotates and/or the washing tub is filled with water.
  • Door lock device 6 comprises a hooked catch element or lever 8 which projects from the outer frame of door 4 towards front wall 3 of casing 2, and enters into a corresponding through opening 9 formed in front wall 3 of casing 2, next to opening 3a. More specifically, hooked catch element 8 is hinged to the frame of door 4 to swing about a transverse axis B preferably, though not necessarily, parallel to vertical axis A, so the hooked distal end 8a of catch element 8 goes beyond front wall 3 through opening 9, and rests onto the inner face of wall 3 to secure door 4 firmly to casing 2.
  • In addition to the above, door lock device 6 also comprises a spring element (non shown) designed to keep catch element 8 in a rest position, wherein catch element 8 is substantially perpendicular to plane M of the door frame - i.e. locally perpendicular to the bottom surface of seat 3b - to enable the hooked distal end 8a of catch element 8 to engage the edge of casing 2 defining opening 9; and a door handle 10 which is hinged to the door frame, on the opposite side of plane M with respect to catch element 8, and is mechanically connected to catch element 8 to allow the user to tilt catch element 8 manually to release the hooked distal end 8a of catch element 8 from the edge of front wall 3, i.e. from the edge of casing 2.
  • With reference to Figures 2 and 3, safety lock device 7 is fixed to the inner face of front wall 3, i.e. inside machine casing 2, is substantially aligned with through opening 9 in front wall 3, and comprises a preferably, though not necessarily, plate-like latch element 11 fitted in axially sliding manner to a supporting frame 12 rigidly fixed to front wall 3 of machine casing 2. Latch element 11 extends and is movable on a plane W substantially tangent to the flat bottom of seat 3b in front wall 3, and has a preferably, though not necessarily, rectangular through opening 11a sized to be engaged by the distal end 8a of catch element 8.
  • Safety lock device 7 also comprises a spring member 13 which is interposed between frame 12 and latch element 11 and is designed to keep latch element 11 in an unlock position (Figure 2) in which through opening 11a is substantially aligned with through opening 9 in front wall 3, thus allowing free entrance of the hooked distal end 8a into opening 9 and free tilting of catch element 8.
  • More specifically, with reference to Figure 2, through opening 11a of latch element 11 is dimensioned to partially cover, when latch element 11 rests in the unlock position, the through opening 9 in front wall 3, so that the distal end 8a of catch element 8, to cross opening 9, is obliged to move latch element 11 sideways on supporting frame 12 overcoming the elastic force of spring member 13.
  • In addition to the above, spring member 13 is designed to be less rigid than the spring element of door lock device 6, so that the spring element of door lock device 6 can counteract the elastic force of spring member 13 when the hooked distal end 8a of catch element 8 crosses through opening 9, and keep catch element 8 in the rest position to enable the hooked distal end 8a of catch element 8 to engage the edge of casing 2.
  • With reference to Figure 3, when engaged to the edge of casing 2 defining opening 9, the hooked distal end 8a of catch element 8 also moves latch element 11 sideways on plane W from its unlock position to a lock position in which latch element 11 engages catch element 8 in guillotine-fashion, and the release of the hooked distal end 8a of catch element 8 from the edge of front wall 3 is subordinated to the movement of latch element 11 from the lock position (Figure 3) back to the unlock position (Figure 2).
  • With reference to Figures 2 and 3, safety lock device 7 also comprises a lock pin 15 extending substantially perpendicular to plane W of latch element 11; and an electrically-operated linear actuator 16 for moving lock pin 15 axially on command of the washing machine central control unit or on direct command of the user.
  • More specifically, the body of latch element 11 has a through lateral notch or a through hole 11b which is aligned with lock pin 15 (Figure 3) when latch element 11 is in the lock position and prevents the manually-operated tilting of hooked catch element 8; and linear actuator 16 moves lock pin 15 axially between an extracted position (Figure 3) in which lock pin 15 engages the lateral notch or hole 11b in the body of latch element 11, thus preventing latch element 11 from returning to the unlock position, and a withdrawn position (Figure 2) in which lock pin 15 does not engage the body of latch element 11, thus allowing free movement of the latch element.
  • Linear actuator 16 is a commonly know washing machine part and therefore not described in detail.
  • Unlike known laundry washing machines, front wall 3 of machine casing 2 has, on the bottom of annular recess 5, an additional through hole or slot 17 which is aligned with lock pin 15 of safety lock device 7, and directly communicates with the through hole 11b in latch element 11 (Figure 3) when latch element 11 is in the lock position for preventing manual tilt of catch element 8.
  • In other words, through hole 17 in front wall 3 is aligned with lock pin 15, on the opposite side of latch element 11 to lock pin 15.
  • Clearly, in a different embodiment, slot 17 may be realized on front wall 3 of machine casing 2, outside of sink-shaped seat 3b, i.e. out of annular recess 5.
  • With reference to Figure 3, preferably, though not necessarily, washing machine 1 also comprises a separate emergency-opening tool 18 (namely, an appropriately sized nail or screwdriver), the tip of which is sized to fit easily through hole 17 into casing 2, to engage the end of lock pin 15 and force the axial displacement of lock pin 15 from the extracted position back into the withdrawn position, and so restore latch element 11 to the unlock position. Obviously emergency-opening tool 18 may be replaced by a proper-sized household tool.
  • General operation of laundry washing machine 1 is clearly inferable from the above description, with no further explanation required.
  • The advantages of the washing machine structure as described above are obvious: through hole 17 in front wall 3 allows manual displacement of lock pin 15 from the extracted position to the withdrawn position, thus eliminating repair expenses in the event of lock pin 15 remaining in the extracted position due to electric power failure or mechanical jamming.
  • Clearly, changes may be made to laundry washing machine 1 as described herein without, however, departing from the scope of the present invention.
  • For example, instead of engaging the edge of through opening 9 in front wall 3, the hooked distal end 8a of catch element 8 may engage either the supporting frame 12 or directly the latch element 11 of safety lock device 7 for selectively locking door 4 to machine casing 2.
  • Moreover, in a further non-shown variation, laundry loading and unloading opening 3a on front wall 3 may be shaped so as to incorporate through opening 9. In which case, catch element 8 enters into opening 3a, near to the opening edge, and safety lock device 7 is fixed to front wall 3 so that latch element 11 partially protrudes directly into the perimeter of opening 3a for being engaged by the distal end 8a of catch element 8. The distal end 8a of catch element 8 may hook on the edge of casing 2 defining opening 9, or on supporting frame 12 of safety lock device 7, or directly on latch element 11 of safety lock device 7.
  • With reference to Figure 4, in a further variation of safety lock device 7, lock pin 15 may have a projecting appendix 15a extending substantially parallel to plane W, so that the distal end of appendix 15a projects from the perimeter of latch element 11. In which case, through hole 17 in front wall 3 is aligned with the distal end of appendix 15a, and the tip of emergency-opening tool 18 rests directly on the distal end of appendix 15a to force lock pin 15 axially from the extracted position back into the withdrawn position. In other words, emergency-opening tool 18 does not penetrate the body of latch element 11 to reach lock pin 15.
  • With reference to Figure 5, in a still further variation of safety lock device 7, through hole 17 may be misaligned with lateral notch or through hole 11b, and safety lock device 7 may comprise a rocker arm 20 which extends substantially parallel to latch plane W, is hinged to supporting frame 12 to swing about a rotation axis locally parallel to plane W, and has a first end aligned with the end of lock pin 15, and a second end aligned with through hole 17 in front wall 3. In which case, emergency-opening tool 18 acts on the second end of rocker arm 20, which in turn brings its first end to rest on the end of lock pin 15, and then pushes lock pin 15 back into the withdrawn position.
  • To reach the second end of rocker arm 20, emergency-opening tool 18 may or may not penetrate the body of latch element 11, depending on the shape and position of rocker arm 20 with respect to latch element 11.
  • Finally, in a different non-shown embodiment, laundry washing machine 1 may be a top-loading washing machine. In which case, opening 3a would be located on the upper face of casing 2; door 4 would be hinged in known manner to the top wall of casing 3 for rotating about an horizontal axis; and safety lock device 7 would be fixed to the inner face of the top wall of casing 2, i.e. inside the machine casing 2.

Claims (15)

  1. A laundry washing machine (1) comprising an outer box casing (2) having a first wall (3) provided with a laundry loading and unloading opening (3a), and a door (4) hinged to said first wall (3) to rotate to and from a closing position in which the door (4) rests on the first wall (3) to close the laundry loading and unloading opening (3a); the laundry washing machine (1) also comprising a manually-operated door lock device (6) designed to selectively lock the door (4) to the machine casing (2) when said door (4) is in the closing position, and an electrically-operated safety lock device (7) designed to selectively prevent the manually-operated door lock device (6) from releasing the door (4) from the machine casing (2);
    the door lock device (6) comprising a catch element (8) which projects from the door (4) towards the first wall (3); the safety lock device (7) being fixed to said first wall (3) and comprising a latch element (11) movable between an unlock position in which said latch element (11) does not engage the catch element (8) and permits manual release of the door (4) from the machine casing (2), and a lock position in which said latch element (11) engages the catch element (8) projecting from the door (4) in the closing position, and does not permit manual release of the door (4) from the machine casing (2); the manual release of the door (4) from the machine casing (2) being subordinated to the movement of said latch element (11) from the lock position back to the unlock position and the safety lock device (7) also comprising a movable lock element (15) which is movable between a first position in which said lock element (15) engages the body of said latch element (11) to prevent said latch element (11) from returning to the unlock position, and a second position in which said lock element (15) does not engage the body of the latch element (11) and allows free movement of said latch element (11);
    said laundry washing machine (1) being characterized in that said first wall (3) has a safety through opening (17) by which to insert an emergency-opening tool (18) inside the machine casing (2) to force the movement of said lock element (15) from the first position to the second position.
  2. A laundry washing machine as claimed in Claim 1, wherein said safety lock device (7) comprises a spring member (13) designed to keep the latch element (11) in the unlock position.
  3. A laundry washing machine as claimed in Claim 2, wherein the catch element (8) moves the latch element (11) from the unlock position to the lock position while engaging said latch element (11).
  4. A laundry washing machine as claimed in any one of the foregoing Claims, wherein said latch element (11) is movable in a plane (W) locally substantially tangent to said first wall (3).
  5. A laundry washing machine as claimed in Claim 4, wherein said latch element (11) is a plate-like latch having a through opening (11a) sized to be engaged by the distal end (8a) of the catch element (8).
  6. A laundry washing machine as claimed in any one of the foregoing Claims, wherein said movable lock element (15) is an axially movable lock pin (15) which is movable between an extracted position in which said lock pin (15) engages the body of said latch element (11) to prevent said latch element (11) from returning to the unlock position, and a withdrawn position in which said lock pin (15) does not engage the body of the latch element (11) and allows free movement of said latch element (11).
  7. A laundry washing machine as claimed in Claim 6, wherein the safety through opening (17) in the first wall (3) is substantially aligned with said lock pin (15), on the opposite side of said latch element (11) to the lock pin (15), so that the tip of said emergency-opening tool (18) rests on the lock pin (15) and forces the lock pin (15) axially from the extracted position back into the withdrawn position.
  8. A laundry washing machine as claimed in Claim 7, wherein said lock pin (15) has a projecting appendix (15a), and the safety through opening (17) is aligned with the distal end of said appendix (15a), so that the tip of said emergency-opening tool (18) rests on said projecting appendix (15a) to force the lock pin (15) axially from the extracted position back into the withdrawn position.
  9. A laundry washing machine as claimed in Claim 8, wherein the distal end of said appendix (15a) projects from the perimeter of the latch element (11).
  10. A laundry washing machine as claimed in any one of Claims 6 to 9, wherein said safety lock device (7) comprises lever means (20) for axially moving said lock pin (15); the safety through opening (17) in the first wall (3) being aligned with said lever means (20), and the tip of said emergency-opening tool (18) acting on said lever means (15a, 20) to force the lock pin (15) axially from the extracted position back into the withdrawn position.
  11. A laundry washing machine as claimed in any one of the foregoing Claims, wherein said laundry loading and unloading opening (3a) is formed on the bottom of a seat (3b) formed in the outer face of said first wall (3); the door (4) being designed to fit inside said seat (3b) when in the closing position, and to define within said seat (3b) an annular recess (5); said safety through opening (17) being formed in said annular recess (5).
  12. A laundry washing machine as claimed in any one of the foregoing Claims, wherein said door lock device (6) comprises a catch element (8) which is provided with a hooked distal end (8a) designed to hook onto the edge of the machine casing (2, 12) or of the latch element (11).
  13. A laundry washing machine as claimed in Claim 12, wherein the catch element (8) is hinged to the door frame to swing about a transverse rotation axis (B), and the door lock device (6) also comprises a spring element designed to keep the catch element (8) in a rest position in which the hooked distal end (8a) of the catch element (8) is able to engage said latch element (11); and a door handle (10) which is mechanically connected to said catch element (8) to allow the user to manually tilt the catch element (8) to release the hooked distal end (8a) of the catch element (8) from the machine casing (2, 12) or the latch element (11).
  14. A laundry washing machine as claimed in any one of the foregoing Claims, wherein said first wall (3) is provided with a second through opening (9) and the catch element (8) projects from the door (4) towards the first wall (3) to enter into said first through opening (9); the safety lock device (7) being fixed to the first wall (3) substantially aligned with said second through opening (9); the catch element (8) moving the latch element (11) from the unlock position to the lock position while entering into said second through opening (9).
  15. A laundry washing machine as claimed in Claims 5 and 14, wherein the through opening (11a) of said latch element (11) is substantially aligned with the second through opening (9) in the first wall (3) when the latch element (11) is in the unlock position.
EP08163007A 2008-08-26 2008-08-26 Laundry washing machine Not-in-force EP2159316B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL08163007T PL2159316T3 (en) 2008-08-26 2008-08-26 Laundry washing machine
ES08163007T ES2375531T3 (en) 2008-08-26 2008-08-26 M�? CLOTHING WASHING MACHINE.
EP08163007A EP2159316B1 (en) 2008-08-26 2008-08-26 Laundry washing machine
AT08163007T ATE528433T1 (en) 2008-08-26 2008-08-26 WASHING MACHINE
PCT/EP2009/005620 WO2010022845A1 (en) 2008-08-26 2009-08-04 Laundry washing machine
RU2009132058/12A RU2506361C2 (en) 2008-08-26 2009-08-25 Washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08163007A EP2159316B1 (en) 2008-08-26 2008-08-26 Laundry washing machine

Publications (2)

Publication Number Publication Date
EP2159316A1 true EP2159316A1 (en) 2010-03-03
EP2159316B1 EP2159316B1 (en) 2011-10-12

Family

ID=40293866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08163007A Not-in-force EP2159316B1 (en) 2008-08-26 2008-08-26 Laundry washing machine

Country Status (6)

Country Link
EP (1) EP2159316B1 (en)
AT (1) ATE528433T1 (en)
ES (1) ES2375531T3 (en)
PL (1) PL2159316T3 (en)
RU (1) RU2506361C2 (en)
WO (1) WO2010022845A1 (en)

Cited By (10)

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EP2543760A1 (en) * 2011-07-04 2013-01-09 Electrolux Home Products Corporation N.V. Laundry treatment machine, for example a washing machine or a laundry dryer or washer-dryer with emergency release system
US20140103788A1 (en) * 2012-10-12 2014-04-17 Youngbae Park Washing machine
DE102010063477B4 (en) * 2010-12-20 2015-11-05 Daimer GmbH Türmanagement Remote lockable door lock
US9217263B1 (en) 2015-03-19 2015-12-22 Getac Technology Corporation Double-opening lock assembly
EP2977498A1 (en) 2014-07-22 2016-01-27 Electrolux Appliances Aktiebolag Method for an emergency opening of a door locking device of a laundry washing and/or drying appliance
EP2977501A1 (en) 2014-07-22 2016-01-27 Electrolux Appliances Aktiebolag Emergency openable laundry washing and/or drying appliance
EP3037579A1 (en) * 2014-12-22 2016-06-29 Elettrotecnica Rold Srl Interlock device for the closing door of household appliances
DE102015105271B3 (en) * 2015-04-08 2016-07-07 Getac Technology Corporation Locking device with double opening mechanism
GR20150100324A (en) * 2015-07-21 2017-02-22 Ελενη Δημητριου Παναγιωτιδη Method for the engagement of a locking mechanism
IT201600086484A1 (en) * 2016-08-22 2018-02-22 Piazza Lucio Di IMPROVED APPLIANCE

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CN106436176B (en) * 2016-11-17 2019-01-15 温州天健电器有限公司 A kind of door of washing machine locking device
KR20210076384A (en) 2019-12-16 2021-06-24 엘지전자 주식회사 Washing machine

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010063477B4 (en) * 2010-12-20 2015-11-05 Daimer GmbH Türmanagement Remote lockable door lock
EP2543760A1 (en) * 2011-07-04 2013-01-09 Electrolux Home Products Corporation N.V. Laundry treatment machine, for example a washing machine or a laundry dryer or washer-dryer with emergency release system
US20140103788A1 (en) * 2012-10-12 2014-04-17 Youngbae Park Washing machine
US10145053B2 (en) * 2012-10-12 2018-12-04 Lg Electronics Inc. Washing machine
US10066330B2 (en) 2014-07-22 2018-09-04 Electrolux Appliances Aktiebolag Emergency openable laundry washing and/or drying appliance
US10385586B2 (en) 2014-07-22 2019-08-20 Electrolux Appliances Aktiebolag Method for an emergency opening of a door locking device of a laundry washing and/or drying appliance
EP2977498A1 (en) 2014-07-22 2016-01-27 Electrolux Appliances Aktiebolag Method for an emergency opening of a door locking device of a laundry washing and/or drying appliance
EP2977501A1 (en) 2014-07-22 2016-01-27 Electrolux Appliances Aktiebolag Emergency openable laundry washing and/or drying appliance
US20160024814A1 (en) * 2014-07-22 2016-01-28 Electrolux Appliances Aktiebolag Method for an Emergency Opening of a Door Locking Device of a Laundry Washing and/or Drying Appliance
WO2016102565A1 (en) * 2014-12-22 2016-06-30 Elettrotecnica Rold S.R.L. Interlock device for the closing door of household appliances
EP3037579A1 (en) * 2014-12-22 2016-06-29 Elettrotecnica Rold Srl Interlock device for the closing door of household appliances
US9217263B1 (en) 2015-03-19 2015-12-22 Getac Technology Corporation Double-opening lock assembly
DE102015105271B3 (en) * 2015-04-08 2016-07-07 Getac Technology Corporation Locking device with double opening mechanism
GR20150100324A (en) * 2015-07-21 2017-02-22 Ελενη Δημητριου Παναγιωτιδη Method for the engagement of a locking mechanism
GR1009341B (en) * 2015-07-21 2018-08-13 Ελενη Δημητριου Παναγιωτιδη Method for the engagement of a locking mechanism
IT201600086484A1 (en) * 2016-08-22 2018-02-22 Piazza Lucio Di IMPROVED APPLIANCE

Also Published As

Publication number Publication date
ATE528433T1 (en) 2011-10-15
PL2159316T3 (en) 2012-05-31
RU2506361C2 (en) 2014-02-10
WO2010022845A1 (en) 2010-03-04
ES2375531T3 (en) 2012-03-01
EP2159316B1 (en) 2011-10-12
RU2009132058A (en) 2011-02-27

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