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A door latch device for a domestic electrical appliance, in particular for a dishwasher, has a frame (10) provided or to be provided on a first component of the domestic appliance, a latching unit (28) arranged so it can be displaced relative to the frame between an open position and a latched posit

A door latch device for a domestic electrical appliance, in particular for a dishwasher, has a frame (10) provided or to be provided on a first component of the domestic appliance, a latching unit (28) arranged so it can be displaced relative to the frame between an open position and a latched position for engagement with a closure system of a second component of the domestic appliance that can be moved relative to the first appliance component and is to be locked with respect thereto, and a latching spring assembly that pre-tensions the latching unit and which in the open position of the latching unit forces the unit into engagement with a blocking surface (24) that blocks relaxation of the latching spring assembly. According to one aspect of the invention a control member (52) that is separate from the latching unit and arranged so it can be moved relative thereto is provided, comprising an application system (64) for an actuating portion of the second appliance component and comprising an impact system for a block-cancelling effect on the latching unit. According to a further aspect the latching unit is formed by a one-piece latching body on which, in addition to a latching system (38) for engagement with the closure system of the second appliance component and a blocking system (50) for engagement with the blocking surface (24), supporting surfaces for the latching spring assembly are also arranged.

대표청구항 ▼

What is claimed is: 1. A door latch for a domestic electrical appliance, the appliance comprising a cabinet and a door for closing an access opening formed in the cabinet, the door latch comprising: a frame for mounting on one of the cabinet and door and providing a blocking surface; a latching dev

What is claimed is: 1. A door latch for a domestic electrical appliance, the appliance comprising a cabinet and a door for closing an access opening formed in the cabinet, the door latch comprising: a frame for mounting on one of the cabinet and door and providing a blocking surface; a latching device including a latching portion for latchingly engaging a closure portion provided at the other of the cabinet and door, the latching device disposed for movement relative to the frame between an open position and a latched position; at least one biasing spring member for urging the latching device in the open position thereof into engagement with the blocking surface wherein, when the latching portion moves past the blocking surface, the biasing spring member relaxes to thereby cause movement of the latching device toward the latched position thereof; and a control member disposed for movement with respect to the latching device and the frame, wherein the control member comprising a first portion for engagement by an actuation portion of the other of the cabinet and door during closing of the door, and a second portion for acting, in response to engagement of the first portion by the actuation portion, on the latching device to move the latching portion past the blocking surface. 2. The door latch of claim 1, wherein the control member is mounted on the frame. 3. The door latch of claim 1, wherein the control member is a control lever supported for pivoting movement, the control lever comprising a first lever arm providing the impact portion and a second lever arm providing the engagement portion. 4. The door latch of claim 1, wherein the control member is movable between a rest position and a block-cancelling position and is resiliently biased towards the rest position. 5. The door latch of claim 1, further comprising an electric switch, wherein the control member includes a switch activation portion for activating the electric switch when the control member is moving from a rest position towards a block-cancelling position. 6. The door latch of claim 5, wherein the electric switch is a magnetic field-activated switch and the switch activation portion comprises a magnet providing a magnetic field for activating the switch. 7. The door latch of claim 6, wherein the magnetic field-activated switch is a Reed contact switch. 8. The door latch of claim 5, wherein the switch activation portion is adapted for mechanical activation of the switch. 9. The door latch of claim 1, wherein the latching device is formed as a single body comprising the latching portion, a blocking portion for blocking engagement with the blocking surface, and one or more support surfaces for the at least one biasing spring member. 10. The door latch device of claim 9, wherein the single-body latching device is integrally fabricated as one piece. 11. The door latch of claim 9, wherein the single-body latching device is formed as an elongate slide member mounted for longitudinal and pivoting movement with respect to the frame. 12. The door latch of claim 11, wherein the latching portion is formed in a first longitudinal end region of the slide member, and wherein the slide member is mounted for pivoting movement with respect to the frame about a pivot axis extending through the slide member in a second longitudinal end region of the slide member opposite to the first longitudinal end region. 13. The door latch of claim 11, wherein the latching portion is formed as a latching protrusion adapted for latchingly engaging in a closure recess formed at the other of the cabinet and door. 14. The door latch of claim 11, wherein the slide member comprises two spaced-apart longitudinal side legs accommodating the at least one biasing spring member therebetween. 15. The door latch of claim 14, wherein the side legs are connected by a transverse connecting web in a first longitudinal end region of the slide member and are unconnected over a main part of their length extending up to a second longitudinal end of the slide member, wherein the latching portion is formed in the first longitudinal end region. 16. The door latch of claim 15, wherein the at least one biasing spring member rests against one or more support surfaces formed at each side leg of the slide member in the second longitudinal end region thereof, and further rests against an abutment portion provided between the side legs of the slide member. 17. The door latch of claim 1, wherein the at least one biasing spring member comprises a single helical compression spring. 18. The door latch of claim 1, comprising an arresting member movably supported by the frame and arranged for manual operation to bring the arresting member in arresting engagement with the latching device in the latched position thereof whereby movement of the latching device back into the open position is prevented. 19. A door latch for a domestic electrical appliance, the appliance comprising a cabinet and a door for closing an access opening formed in the cabinet, the door latch comprising: a frame for mounting on one of the cabinet and door and having a blocking surface; a latching device including a latching portion for latchingly engaging a closure portion provided at the other of the cabinet and door, the latching device disposed for movement relative to the frame between an open position and a latched position; at least one biasing spring member for urging the latching device in the open position thereof into engagement with the blocking surface wherein, when the latching portion moves past the blocking surface, the biasing spring member relaxes to thereby cause movement of the latching device toward the latched position thereof; wherein the latching device is formed as a single body comprising a latching portion for latchingly cooperating with the closure portion, a blocking portion for blocking engagement with the blocking surface, and one or more support surfaces for the at least one biasing spring member. 20. A door latch for a domestic electrical appliance, the appliance comprising a cabinet and a door for closing an access opening formed in the cabinet, the door latch comprising: a frame for mounting on one of the cabinet and door and having a blocking surface; a latching device including a latching portion for latchingly engaging a closure portion provided at the other of the cabinet and door, the latching device disposed for movement relative to the frame between an open position and a latched position; at least one biasing spring member for urging the latching device in the open position thereof into engagement with the blocking surface wherein, when the latching portion moves past the blocking surface, the biasing spring member relaxes to thereby cause movement of the latching device toward the latched position thereof; an abutment member provided separately from the latching member and movably supported by the frame, the at least one biasing spring member resting against the abutment member; wherein the latching device has freedom of movement in the latched position thereof to allow the latching portion to move out of a path of movement of the closure portion relative to the one of the cabinet and door during closing of the door against an elastic force, the elastic force generated by the at least one biasing spring member and transmitted to the latching device via the abutment member. 21. The door latch of claim 20, wherein the abutment member is mounted for pivoting movement with respect to the frame. 22. A door latch for a domestic electrical appliance, the appliance comprising a cabinet and a door for closing an access opening formed in the cabinet, the door latch comprising: a frame for mounting on one of the cabinet and door and having a blocking surface; a latching device including a latching projection for latchingly engaging in a closure recess provided at the other of the cabinet and door, the latching device disposed for movement relative to the frame between an open position and a latched position; at least one biasing spring member for urging the latching device in the open position thereof into engagement with the blocking surface wherein, when the latching portion moves past the blocking surface, the biasing spring member relaxes to thereby cause movement of the latching device toward the latched position thereof; wherein a trajectory of movement of the latching device from the open position to the latched position relative to the frame comprises a first part of substantially inserting the latching projection into the closure recess and a second part directed transversely to the first part, the latching projection moving along at least most of the first part while the latching device is still in blocking engagement with the blocking surface and moving along at least most of the second part once the latching device is released from blocking engagement with the blocking surface.