Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B47/0009—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with thermo-electric actuators, e.g. heated bimetals
• • 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
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
• • 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
• • 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
  • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
  • D06F34/10—Power supply arrangements, e.g. stand-by circuits
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S292/00—Closure fasteners
  • Y10S292/66—Thermally controlled mechanism
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S292/00—Closure fasteners
  • Y10S292/69—Washing machine or stove closure latch
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T292/00—Closure fasteners
  • Y10T292/08—Bolts
  • Y10T292/0911—Hooked end
  • Y10T292/0945—Operating means
  • Y10T292/0946—Link and lever
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T292/00—Closure fasteners
  • Y10T292/08—Bolts
  • Y10T292/0911—Hooked end
  • Y10T292/0945—Operating means
  • Y10T292/0948—Closure
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T292/00—Closure fasteners
  • Y10T292/08—Bolts
  • Y10T292/1043—Swinging
  • Y10T292/1075—Operating means
  • Y10T292/1082—Motor

Definitions

• the invention relates to a door lock, in particular for a washing machine door, with a pivotably mounted rotary latch for locking a locking element and with a pivotably mounted inhibiting element which can be pivoted between a locking position locking the rotary bolt and an unlocking position releasing the rotary bolt.
• Such a door lock is e.g. known from DE 198 34 844 C2.
• a pawl is provided to block the inhibitor, which can be actuated by an electromagnet. Due to a large number of effective levers, a force acting on the closing element in the opening direction up to the point of engagement of the pawl on a blocking surface of the blocking element is considerably reduced. However, there is no provision for a mechanism that becomes effective in the event of a power failure and takes safety-related aspects into account.
• a door lock for a washing machine door which shows a defined behavior in the event of a power failure, is known, for example, from DE 199 15 669 A1.
• a bimetallic spring washer is heated by an electrical heating element, the spring washer being connected to a rocker which can block or release a locking slide of the door lock via a securing element.
• the bimetallic spring washer is heated so that after a warming-up phase of the spring washer, the swing arm is actuated and the door lock is blocked in the closed position. After the washing process has ended, the door lock remains blocked due to the heated bimetal spring washer.
• This effect serves to prevent the washing machine door from opening too early, particularly when the drum is running. After the spring washer has cooled, the door lock is released again.
• the predefined blocking time during which the door lock remains blocked must be designed in such a way that the door lock remains blocked for a sufficiently long time with every selectable washing program and every possible drum loading. Due to this non-variable locking time, there are operating modes in which the door lock remains blocked for an unnecessarily long time.
• a door locking device for washing machines or laundry drying machines in which the time during which the locking remains blocked after the washing or drying process has ended, is known, for example, from EP 0 384 148 B1.
• the blocking of the locking device depends on characteristic sizes of the machine such as the temperature and the level of the washing bath and the speed of rotation of the drum. However, safety requirements are not adequately met because there is no defined behavior in the event of a power failure.
• the invention is based on the object of specifying a door lock, in particular for a washing machine door, which both enables controllable blocking and also has emergency locking properties independent of the energy supply.
• a torque can be exerted on the pivotably mounted inhibitor both via the actuator system and via the bimetal control element.
• the torque that can be transmitted by the actuator system is greater than the torque that can be transmitted by the bimetal control element.
• the action of the bimetal control element can always be overridden by the controllable actuator system, provided that the power supply is undisturbed.
• the blocking of the locking can be released as soon as this is possible without safety concerns due to the operating state of the washing machine and the actuator system receives a corresponding control signal.
• the bimetal control element can be limited to a safety-related emergency function. In the event of a power failure and thus failure of the actuator system, the locking remains blocked until the bimetal control element has cooled down sufficiently and releases the rotary latch via a pivoting movement of the inhibiting element. Since this safety mechanism only comes into effect in the event of a power failure, a blocking time of the bimetal control element, which can include additional safety reserves, is not disadvantageous when the washing machine is operated as intended. A heating-up phase of the heating element and the bimetallic control element after the start of the energy supply is not relevant from a safety point of view, since the rotary latch can be blocked directly by the actuator system and blocking is therefore possible immediately after the washing machine door is closed.
• a particularly simple design of the actuator system is preferably achieved by designing it as a double magnet system. With this design, a magnetic core can act directly on both the inhibitor and the rotary bolt. The interaction of the actuator system and the inhibitor can be designed in such a way that the actuator can pivot the inhibitor from its locking position to its unlocking position, but not vice versa. This means that only the bimetal adjusting element is provided for locking the inhibiting member, while both the bimetal adjusting element and the actuator system are provided for unlocking the inhibiting member.
• an electrical locking contact is advantageously provided, which is closed, for example, when the rotary bolt is closed, that is to say the locking element is locked.
• a door position-dependent contact system is provided, which is triggered by a door position-dependent slide regardless of the position of the rotary bolt. Both the electrical locking contact the door position-dependent contact system is also preferably connected to a machine control system, it also being possible to connect to a superordinate communication system, for example via an installation bus.
• a circuit board is advantageously provided for connecting the electrical, electronic and electromechanical components, such as door position-dependent contact system, electrical locking contact, heating element, bimetal control element and actuator system.
• the individual components can either be attached directly to the circuit board or connected to it, for example via plug contacts.
• the circuit board is also suitable for connecting a compact connector, via which both the lines for the energy supply to the door lock and the signal lines can be connected.
• FIG. 1 is an exploded view of a door lock
• Fig. 2 schematically shows a section through the door lock with the rotary latch open
• FIG. 3 shows a section according to FIG. 2 with the rotary latch closed
• FIG. 5 shows an inhibitor in the unlocked position and, in sections, a rotary latch and an actuator system
• Fig. 1 shows the door lock 1 with its essential components.
• a base plate 2 made of metal, for example die-cast zinc, can be connected, in particular screwed, to a housing 3 made of plastic which forms a drive unit.
• the base plate 2 can be connected, in particular screwed, to a washing machine housing (not shown).
• the base plate 2 has a pin 5 held between two cheeks 4, on which a locking element or locking block 6 (FIG. 4) can engage.
• the locking block 6 also engages a slide 8 which is dependent on the door position and which is connected to a spring 9.
• the slider 8 penetrates the actuation side 10 of the housing 3, which is shown on the right.
• the spring 9 presses the slider 8 in the direction of the bolt 5.
• microswitches 11 are arranged in the housing 3, which are parts of a contact position-dependent contact system 12 are.
• a rotary latch 13 is pivotally mounted on an axis of rotation 14.
• An actuator system 15 designed as a double magnet system is provided for actuating the rotary bolt 13.
• An upper coil 16 and a lower coil 17 are for Displacement of a substantially cylindrical magnetic core 18 is provided.
• a tapered area 19 of the magnetic core 18 penetrates a semicircular recess 20 of the rotary bolt 13.
• the tapered region 19 of the magnetic core 18 is adjoined by a head part 21 which, with its annular upper edge 21 ', connects to a semicircular support surface 22 of the rotary bolt surrounding the recess 20 13 can attack.
• the underside 23 of the head part 21 is provided for actuating an inhibiting element 24 which is pivotably mounted about an axis of rotation 25.
• the axis of rotation 14 of the rotary bolt 13 and the axis of rotation 25 of the inhibiting element 24 are parallel to one another in the exemplary embodiment. Deviating from this, the axes of rotation 14, 25 can also be arranged in different planes including an angle, in particular a right angle.
• the inhibiting element 24 has an actuating arm 26 for actuation by the magnetic core 18, a blocking arm 27 for blocking the rotary bolt 13 and a fork arm 28 for receiving an end 29 of a bimetal actuating element 30.
• the bimetal actuating element 30 can be heated by a PTC (positive temperature coefficient) heating element 31, which bears directly on the bimetal actuating element 30.
• Contacts 32 are provided to supply energy to the heating element 31.
• a voltage is applied to the heating element 31 via the contacts 32 and the bimetal control element 30. All of the contacts 32 of the housing 3 which are led outwards are combined on its connection side 33 in a compact plug 34.
• the connections 32 of the compact plug 34 are connected to a printed circuit board 35 as a carrier for the electrical and electronic components.
• the circuit board 35 is located below a cover 36 of the housing 3.
• the functions of the rotary latch 13 can be seen in more detail in FIGS. 2 to 4.
• the rotary latch 13 has a hook 37 protruding from the housing 3 on its actuating side 10, which engages under the washing machine with the door closed and the closing element 6 closed (FIG. 4) and thus blocks it.
• the locking member 6 is pivotable about a pivot point 38 and has a hook 39 which engages around the bolt 5, and a driver 40 which presses the slide 8 into the housing 3.
• a resilient locking contact 42 is separated from a fixed locking contact 43 by a contact arm 41. stands held.
• the locking contacts 42, 43 like the door position-dependent contact system 12, are connected to a control, not shown, which, for example, only enables the washing process to be started when the locking contacts 42, 43 are closed.
• the magnetic core 18 is tightened so that the return spring 44 is compressed.
• the inhibitor 24 has no function in this process. Without an energy supply, the bimetallic adjusting element 30 is prestressed in such a way that it presses the fork arm 28 of the inhibiting element 24 in the direction of a stop 45 which lies in the housing 3 opposite the actuating side 10. Torque acts clockwise on the inhibiting element 24.
• the blocking arm 27 When the inhibiting member 24 is pivoted into its locking position (FIGS. 3, 6, 7), the blocking arm 27 is positioned below a projection 46 of the rotary latch 13. The blocking arm 27 is axially offset relative to the actuating arm 26 with respect to the axis 25 of the inhibiting member 24. If the power supply to the actuator system 15 fails, the return spring 44 exerts a force on the rotary latch 13 in the direction of its open position, the blocking arm 27 blocking the rotary latch 13 in its closed position (FIG. 7) after only a very small adjustment path of the rotary latch 13 , The blocking arm 27 rests on the projection 46 in such a way that the Blocking a slight lifting of the rotary latch 13 against the action of the return spring 44 is required.
• the torque that can be applied to the inhibiting element 24 by the actuator system 15 via the magnetic core 18 and the actuating arm 26 is greater than the torque that can be applied to the inhibiting element 24 by the bimetal control element 30. This means that the controlled actuation of the rotary latch 13 by the actuator system 15 always prevails against the passively effective bimetal control element 30.
• an emergency release 48 (FIG. 8) comprising an emergency unlocking spring 47 is provided.
• the emergency release spring 47 has a spring winding 49 arranged concentrically about the axis of rotation 25 and an arm 50 formed thereon, which rests on a bar 51 of the housing 3.
• a projection 52 of the actuating arm 26 bears against the arm 50.
• a bracket 54 protruding from a rear wall 53 of the housing 3 (FIG. 9) is formed on the arm 50.
• the blocking of the inhibiting element 24 can be released by moving the arm 50 and thus the actuating arm 26 through a window 55 in the rear wall 53 of the housing 3, for example by means of a cable (not shown).
• the connection of the housing 3 to the base plate 2 by screws 56 can also be seen from FIG. 9. LIST OF REFERENCE NUMBERS
• Locking device locking block 33 connection side
• Microswitch 37 hooks door-dependent contact 38 pivot system 39 hooks
• Headboard 49 spring turn upper edge 50 arm
• Blocking arm 56 screws

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
• Lock And Its Accessories (AREA)
• Closing And Opening Devices For Wings, And Checks For Wings (AREA)
• Detail Structures Of Washing Machines And Dryers (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7705029

Family Applications (1)

Country Status (9)

Families Citing this family (29)

Family Cites Families (20)

• 2001
  • 2001-11-08 DE DE2001154850 patent/DE10154850C1/de not_active Expired - Fee Related
• 2002
  • 2002-10-29 DE DE20216614U patent/DE20216614U1/de not_active Expired - Lifetime
  • 2002-11-02 CZ CZ20033324A patent/CZ20033324A3/cs unknown
  • 2002-11-02 PL PL02366929A patent/PL193794B1/pl not_active IP Right Cessation
  • 2002-11-02 WO PCT/EP2002/012247 patent/WO2003040457A1/fr not_active Ceased
  • 2002-11-02 CA CA 2450212 patent/CA2450212C/fr not_active Expired - Fee Related
  • 2002-11-02 AT AT02787544T patent/ATE338843T1/de active
  • 2002-11-02 ES ES02787544T patent/ES2271354T3/es not_active Expired - Lifetime
  • 2002-11-02 EP EP02787544A patent/EP1442169B1/fr not_active Expired - Lifetime
  • 2002-11-02 DE DE50208084T patent/DE50208084D1/de not_active Expired - Lifetime
• 2004
  • 2004-01-05 US US10/751,594 patent/US6886868B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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