Household appliance with a safety device to prevent the exit of cloths and related safety device

Abstract

The present invention concerns a household appliance (1), such as a washing machine and the like, comprising a chassis (11), a drum (12), for containing clothes (P), said drum (12) being contained in said chassis (11) and accessible through an opening (13), and a door (2), hinged to said chassis (11), for closing said opening (13), characterized in that it comprises a safety device (3) arranged to interact with said door (2) and configured to interrupt the operation of said household appliance (1) in case of said clothes (P) contained in said drum (12) exert a stress on said door (2) exceeding a safety threshold. The present invention also relates to a safety device (3) to prevent the exit of clothes (P) from a household appliance (1).

Claims

1. A safety device to prevent the exit of clothes from a household appliance, wherein said household appliance comprises: a chassis; a drum for containing clothes, the drum being contained in said chassis and accessible through an opening; and a door, hinged to the chassis, for closing the opening, the door comprising a recess, wherein the safety device comprises a slider configured to insert into the recess of the door, wherein the safety device is arranged to interact with the door of the household appliance via the slider being inserted into the recess of the door, wherein the safety device is configured to interrupt the operation of the household appliance via a switch connected to the slider interrupting a power supply circuit of the household appliance with the clothes contained in the drum exerting a stress on the door exceeding a safety threshold and the door stressing the slider in the recess.

2. The safety device according to claim 1, wherein the switch is directly or indirectly insertable in the power supply circuit of the household appliance, so that, with said switch in a first state, the household appliance can normally operate, and with said switch in a second state, the household appliance is not powered; further comprising: a safety member, movable between a rest position, in which the safety member is disengaged from said door, and an operating position, in which the safety member is engaged with the door of the household appliance, wherein the safety member is configured to cause the passage of the switch from the first state to the second state, wherein said safety member comprises the slider; and a return member comprising a spring, wherein the return member is fixed between the chassis of the household appliance and the slider, wherein the safety member is configured such that, with the safety member in the operating position: with the stress of the clothes on the door being less than said safety threshold, said slider is configured to be held in position by the return member; and with the stress of the clothes on the door being greater than the safety threshold, said door is configured to stress said slider, which, overcoming the resistance of the return member, due to the passage of the switch from said first state to said second state, is configured to interrupt the power supply circuit of said household appliance.

3. The safety device according to claim 1, wherein the household appliance comprises a washing machine.

4. The safety device according to claim 2, wherein the slider, with the slider stressed by said door with the door of the household appliance stressed by said clothes, is configured to move in a direction perpendicular to that the slider moves with the slider passing from the rest position to the operating position and vice versa.

5. The safety device according to claim 2, wherein with said switch in the first state, the switch is closed, and with said switch in the second state, the switch is open.

6. The safety device according to claim 5, wherein said switch comprises a diverter coupled with the safety member, so as to pass the switch from the first to the second state in case of a movement of the slider, as a result of the stress of the door of the household appliance by the clothes.

7. The safety device according to claim 2, wherein said safety member inserts in the recess of the door of the household appliance in said operating position.

8. The safety device according to claim 2, wherein the household appliance comprises a control logic unit, and wherein the safety device comprises an actuator operatively connected to the control logic unit of the household appliance, wherein the actuator is adapted to move said safety member from the rest position to the operating position and vice versa, due to a control of the control logic unit of the household appliance.

9. The safety device according to claim 1, wherein, when the safety device interrupts the operation of the household appliance, the safety device is configured not to allow the reactivation of the household appliance, unless a user manually carries out the activation.

10. The safety device according to claim 1, wherein the chassis of the household appliance comprises a housing, and wherein the safety device is housed in the housing of the chassis of the household appliance, the housing positioned at a portion of the perimeter of the opening.

11. A safety device to prevent the exit of clothes from a household appliance, wherein said household appliance comprises: a chassis; a drum for containing clothes, the drum being contained in said chassis and accessible through an opening; and a door, hinged to the chassis, for closing the opening, wherein the safety device comprises a protrusion configured to engage the door, wherein the safety device is arranged to interact with the door of the household appliance via the protrusion engaging the door, wherein the safety device is configured to interrupt the operation of the household appliance via a switch connected to the protrusion interrupting a power supply circuit of the household appliance with the clothes contained in the drum exerting a stress on the door exceeding a safety threshold and the door stressing the protrusion engaging the door.

12. The safety device according to claim 11, wherein the switch is directly or indirectly insertable in the power supply circuit of the household appliance, so that, with said switch in a first state, the household appliance can normally operate, and with said switch in a second state, the household appliance is not powered; further comprising: a safety member, movable between a rest position, in which the safety member is disengaged from said door, and an operating position, in which the safety member is engaged with the door of the household appliance, wherein the safety member is configured to cause the passage of the switch from the first state to the second state, wherein said safety member comprises a slider, the slider comprising the protrusion; and a return member comprising a spring, wherein the return member is fixed between the chassis of the household appliance and the slider, wherein the safety member is configured such that, with the safety member in the operating position: with the stress of the clothes on the door being less than said safety threshold, said slider is configured to be held in position by the return member; and with the stress of the clothes on the door being greater than the safety threshold, said door is configured to stress said slider, which, overcoming the resistance of the return member, due to the passage of the switch from said first state to said second state, is configured to interrupt the power supply circuit of said household appliance.

13. The safety device according to claim 12, wherein the slider, with the slider stressed by said door with the door of the household appliance stressed by said clothes, is configured to move in a direction perpendicular to that the slider moves with the slider passing from the rest position to the operating position and vice versa.

14. The safety device according to claim 12, wherein with said switch in the first state, the switch is closed, and with said switch in the second state, the switch is open.

15. The safety device according to claim 14, wherein said switch comprises a diverter coupled with the safety member, so as to pass the switch from the first to the second state in case of a movement of the slider, as a result of the stress of the door of the household appliance by the clothes.

16. The safety device according to claim 12, wherein the door of the household appliance comprises a recess, and wherein said safety member inserts in the recess of the door of the household appliance in said operating position.

17. The safety device according to claim 12, wherein the household appliance comprises a control logic unit, and wherein the safety device comprises an actuator operatively connected to the control logic unit of the household appliance, wherein the actuator is adapted to move said safety member from the rest position to the operating position and vice versa, due to a control of the control logic unit of the household appliance.

18. The safety device according to claim 11, wherein the household appliance comprises a washing machine.

19. The safety device according to claim 11, wherein, when the safety device interrupts the operation of the household appliance, the safety device is configured not to allow the reactivation of the household appliance, unless a user manually carries out the activation.

20. The safety device according to claim 11, wherein the chassis of the household appliance comprises a housing, and wherein the safety device is housed in the housing of the chassis of the household appliance, the housing positioned at a portion of the perimeter of the opening.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention will be now described, for illustrative but not limitative purposes, according to its preferred embodiments, with particular reference to the figures of the enclosed drawings, wherein:

(2) FIG. 1 shows a longitudinal sectional view of a top-load washing machine provided with a device for preventing the clothes to exit according to the present invention, in which the door is open;

(3) FIG. 2 shows a detail of FIG. 1;

(4) FIG. 3 shows a longitudinal sectional view of a washing machine according to FIG. 1 in which the door is closed;

(5) FIG. 4 shows a detail of FIG. 3;

(6) FIG. 5 shows a longitudinal sectional view of a washing machine according to FIG. 1, in which the door is closed and the contained clothes exert a mechanical stress on the door; and

(7) FIG. 6 shows a detail of FIG. 5.

DETAILED DESCRIPTION

(8) In the various figures, similar parts will be indicated by the same reference numbers.

(9) Referring to FIGS. 1 and 2, it is seen a household appliance 1 with a safety system to prevent the clothes to exit.

(10) The washing machine 1 essentially comprises a chassis 11, a drum 12, for holding the clothes P contained within said chassis 11, a door 2 hinged to said chassis 11 for closing an opening 13 for accessing the drum 12.

(11) Said door 2 has a recess 21, whose function will be better defined below.

(12) In addition, said chassis 11 has a housing 14 in correspondence with a portion of the perimeter of said opening 13, the function of which will be better defined in the following.

(13) Said washing machine 1 also includes a safety device 3 to prevent the exit of the clothes P from the drum 12, while the washing machine 1 is operating.

(14) Said safety device 3 is installed in said housing 14 and is capable of detecting any stress of said clothes on said drum 12.

(15) Said device 3 comprises a slider 31 movable according to the arrow A between a rest position, in which it is disengaged from said recess 21, and an operating position, in which it is engaged with said recess 21.

(16) The slider 31 is operated by a suitable actuator, not shown in the figures, controlled by a logic control unit of the washing machine 1 or the household appliance in general.

(17) In particular, when the door 2 is closed and the washing machine 1 is operated by a user, said actuator moves said slider 31 from said rest position to said operating position and vice versa, when the washing machine 1 is deactivated.

(18) Said safety device 3 also includes a return spring 32, fixed between said chassis 11 and said slider 31, and a switch 33 inserted directly or indirectly into the power supply circuit of said washing machine 1 or capable of generating a signal, so that, when said switch 33 is closed, said washing machine 1 can operate on a regular basis, while, when said switch 33 is open, said washing machine 1 is not power supplied, i.e., a signal is generated that is received by the logic control unit of the washing machine 1, inhibiting the operation.

(19) The diverter 33′ of said switch 33 is physically coupled to said slider 31, such that in case of a movement of said slider 31 in the direction of the arrow B, i.e. transversely to said arrow A.

(20) The operation of the washing machine 1 described above, provided with the safety device 3, is as follows.

(21) When said washing machine 1 operates on regular basis, drum 12 is loaded with clothes P and the door 2 is closed.

(22) When the washing machine 1 is operated, said actuator moves the slider 31 from said rest position to said operating position (see FIGS. 3 and 4), such that said slider 31 inserts in said recess 21 of said door 2.

(23) In this configuration, the switch 33 is closed and, therefore, the washing machine 1 is power supplied.

(24) If during the washing operations the clothes P contained within the drum 12 exert a moderate (and normal) pressure on the inner surface of said door 2, said door 2 would tend to raise the slider 31 upwards (with respect to the figure). The return spring 32 would, of course, tend to bring the slider back to its normal position.

(25) If, on the other hand, when the clothes P contained within the drum 12 during the washing operations exert a mechanical stress on the door 2 beyond a specific threshold (as shown in FIG. 5), the door 2 would also raise upwards also the slider 31, since the latter would interfere with the recess 21, so as to overcomes the retorn force of said spring 32.

(26) The slider 31, in this case, by means of the diverter 33′, causes the opening of the switch 33, interrupting the power supplying of the washing machine 1. The logic control unit of the washing machine 1, even if immediately after the stress on the door 2 would be interrupted and the switch 33 would then close, it would not allow the reactivation of the washing machine 1 unless the user voluntarily activates it.

(27) An advantage of the present invention is to prevent the clothes contained within a washing machine from causing excessive pressure on the door, causing the opening thereof, to increase the safety of the system.

(28) The present invention has been described for illustrative but not limitative purposes, according to its preferred embodiments, but it is to be understood that modifications and/or changes can be introduced by those skilled in the art without departing from the relevant scope as defined in the enclosed claims.