CN2716313Y

CN2716313Y - Safety device for electric control delay time door lock of washing machine

Info

Publication number: CN2716313Y
Application number: CN 200420093376
Authority: CN
Inventors: 王朝圣
Original assignee: WENZHOU YAOHUA TELECOMMUNICATION CO Ltd
Current assignee: WENZHOU YAOHUA TELECOMMUNICATION CO Ltd
Priority date: 2004-09-08
Filing date: 2004-09-08
Publication date: 2005-08-10
Anticipated expiration: 2014-09-08

Abstract

The utility model relates to a safety device for an electric control delay time door lock of a washing machine. The utility model comprises a base, a tongue-shaped spring leaf fixed on the base, a U-shaped spring leaf arranged at the middle part of the tongue-shaped spring leaf, a lock latch of a movable end of the tongue-shaped spring leaf, a PTC ceramic heating body, a bimetallic strip, a sliding plate, a resetting spring, contact points, etc. When a washig machine is in operation after electrifying the washing machine, the bimetallic strip is heated by the PTC ceramic heating body to deform, the movable end of the tongue-shaped spring leaf is pushed to drive the lock latch downwards inserting into a square hole of the sliding plate to lock the sliding plate, and a door of the washing machine is ensured not to be opened in working process of the washing machine; when a switch is turned off after washing is finished, the spring leaves and the sliding plate can be reset due to cooling of the bimetallic strip, and therefore, the door can be opened at the moment. The device is a safety device which can effectively prevent accidents caused by opening of the door of the washing machine when the washing machine is in working process, and can also be widely used in household appliance products with the similar safety requirements.

Description

The automatically controlled time-delay door lock of washing machine safety device

Affiliated technical field

The utility model relates to the automatically controlled time-delay door lock of a kind of household electrical appliance safety device, in particular for the automatically controlled time-delay door lock safety device of washing machine.

Background technology

At present, known washing machine electric control door lock device mainly is to be made of leaf spring movable contact spring, stationary contact, bimetal leaf, memorial alloy and bolt etc.But; realization is to the safeguard protection of washing machine door lock with the movable contact spring action of this bimetal leaf temperature distortion drive leaf spring; because bimetal leaf varies with temperature sensitivity and comparatively limits to; cause leaf spring movable contact spring movement range limited; thereby can not realize well opening and closing fast, make this general security of washing machine electric control door lock device, reliability reduce greatly.

Summary of the invention

Reflect insensitive deficiency in order to overcome existing washing machine electric control door lock device, the utility model provides a kind of washing machine automatically controlled time-delay door lock assembly, this door lock assembly not only can be realized the locking fast and safely to door of washing machine in the duty, and can be according to the actual conditions adjusting of delaying time, make device keep best duty, applicability is stronger.

The technical scheme that its technical problem that solves the utility model adopts is: a pair of bimetal leaf that places base bottom, adjust screw and be positioned at the bimetal leaf bottom, one end is fixed on the tongue-shaped reed group of base interior, and have one " U " shape reed, tongue-shaped reed to be positioned at bimetal leaf top at tongue-shaped reed group middle part.Close the door when energising at washing machine, bimetal leaf is added thermal deformation by ceramic heating element, promotes tongue-shaped reed, and because the existence of tongue-shaped reed middle part " U " shape reed, makes the deformation action of tongue-shaped reed become a phase transition process significantly.Thereby increased the sensitivity of tongue-shaped reed greatly, reached the purpose of fast opening and closing, the security of device, reliability are strengthened greatly, adjusted the setting of screw simultaneously, made the device applicability stronger.

In the automatically controlled time-delay door lock of this washing machine safety device, what the flexible connection between tongue-shaped reed and " U " shape spring leaf can be for open type or closed type.Open type is that a projection is arranged on the tongue-shaped reed the tip of the tongue, and it is directly embedded in the end perforate of corresponding with it " U " shape spring leaf, and this perforate can be circular, square or arbitrary shape.Closed type is about to tongue-shaped reed and is connected with " U " shape spring leaf in the mode that links.

In addition, in the automatically controlled time-delay door lock of this washing machine safety device, a pair of bimetal leaf that places base bottom is the bimetal leaf of a pair of shape difference, performance difference or a pair of identical bimetal leaf.

The beneficial effects of the utility model are, can realize regulating delay time easily in the safety locking of opposite house when work state of washing machine, further strengthen the security of washing machine work, make the device applicability stronger.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Master when Fig. 1 is the present embodiment horizontal positioned looks partial sectional view;

Fig. 2 be the present embodiment horizontal positioned be overlook partial sectional view.

The Reference numeral of accompanying drawing title correspondence among the figure: pedestal 1, base seat lid 2, an end are fixed on the tongue-shaped reed group 3 of base interior, the U-shaped reed 4 that is installed in the tongue-shaped reed middle part, the lock bolt 9 that is installed in the tongue-shaped reed movable end, PTC ceramic heating element 5, a pair of

bimetal leaf

6 and 7, adjust screw 8, slide plate 13, back-moving spring 12,

contact

10 and 11, draw inserted

sheet

15,16 and 17, housing 14, tongue-shaped reed 18 and hold-down screw 19.

The specific embodiment

As Fig. 1, shown in 2, present embodiment comprises: one is used for the pedestal 1 of portion's installation component within it, one one end is screwed the tongue-shaped reed group 3 in base interior, tongue-shaped reed 18 is included in the tongue-shaped reed group, at a U-shaped reed 4 that is installed in the tongue-shaped reed middle part, a lock bolt 9 that is installed in ligulate spring movable end, a PTC ceramic heating element 5, the a pair of bimetal leaf 6 that is placed under the ceramic heating element, 7, a housing 14, a slide plate 13 that is placed on the housing inner bottom part, a back-moving spring 12 that is embedded in housing bottom one side, a stationary contact 11 that is riveted on inserted sheet 16 bodies, point is welded in the movable contact 10 on the tongue-shaped reed, and power supply is drawn inserted

sheet

15,17 etc.

When washing machine at closing time, gate stop is stirred slide plate and catch on inner walls after move to left, being put in place along the angle that can turn left after direction as shown is inserted housing bore.If start washing machine this moment, inserted

sheet

15 and 17 will be connected power supply, and by ligulate spring plate group 3, PTC ceramic body 5,

bimetal leaf

6 and 7 is adjusted screw 8 and is formed the

loop.Bimetal leaf

6 and 7 is flexural deformation rapidly under the heat effect of PTC ceramic body 5, make ceramic body toward rising, and cause lifting on the tip of the tongue of ligulate spring leaf, drive U-shaped reed 4 upset left, force the movable end of ligulate spring leaf downward, insert slide hole downwards with slide plate 13 pinnings with the lock bolt 9 that is fixed on the movable end.While stationary contact 11 and movable contact 10 closures are by inserted sheet 16 output voltages.After this, in laundry processes, door is firmly pinned.When program for washing is finished, the power supply on the inserted

sheet

15 and 17 is cut off, and bimetal leaf resiles owing to the thermal source of ceramic body is cut off to cool off.PTC ceramic body 5, U-shaped spring leaf 4, ligulate spring 18, lock bolt 9 all recover the initial position before the energising.Slide plate 13 is released.In said process, the temperature distortion of bimetal leaf and cooling recover all to need the regular hour, and this time can be regulated by adjusting screw 8, to change the locking time-delay and the delay time of unblanking, to satisfy the needs of different user and various types.General preferred locking time-delay was unblanked to delay time 60-150 second from 3-10 second.Usually all be that producer sets the good time-delay and not rechanging unblanked of calibration in advance according to the washing machine rundown time dispatching from the factory before, safer, conveniently to guarantee the user.

Claims

1. the automatically controlled time-delay door lock of a washing machine safety device comprises: an inside is used for the pedestal (1) and the base seat lid (2) of installation component, movable contact (10) and stationary contact (11), spring plate group, PTC ceramic heating element (5), place below this heater and be in contact with it bimetal leaf (6) and (7) of heat transfer, a back-moving spring (12), one is installed in housing (14) bottom and can movable slide plate below pedestal, it is characterized in that: this spring plate group is a ligulate spring plate group (3), tongue-shaped reed (18) flexibly connects with one " U " shape spring leaf (4), and one is installed in the beneath adjustment screw (8) of bimetal leaf.

2. the automatically controlled time-delay door lock of washing machine according to claim 1 safety device is characterized in that ligulate spring leaf (18) is a ligulate structure empty in.

3. the automatically controlled time-delay door lock of washing machine according to claim 1 and 2 safety device is characterized in that bimetal leaf (6) and (7) in this device are a pair of identical bimetal leaf.

4. the automatically controlled time-delay door lock of washing machine according to claim 1 and 2 safety device is characterized in that the bimetal leaf (6) in this device is different for a pair of shape with (7), the bimetal leaf of performance difference.

5. the automatically controlled time-delay door lock of washing machine according to claim 1 safety device is characterized in that its adjustment screw can be 3-10 second and unblank delay time 60-150 second according to washing machine type adjusting locking time-delay.

6. according to claim 1,2,5 the automatically controlled time-delay door lock of arbitrary described washing machine safety device is characterized in that flexible connection between tongue-shaped reed (18) and " U " shape spring leaf (4) is an open type.

7. according to claim 1,2,5 the automatically controlled time-delay door lock of arbitrary described washing machine safety device is characterized in that flexible connection between tongue-shaped reed (18) and " U " shape spring leaf (4) is a closed type.