Locking device for automatic door-opening / closing type dishwasher, and dishwasher

Abstract

Disclosed in the present invention are a locking device for an automatic door-opening / closing type dishwasher and a dishwasher. The locking device comprises a door lock and a door latch; the door lock and the door latch are mounted on a box body and a door cover of the dishwasher, respectively; and the door lock is provided with a locking mechanism capable of moving close to or away from a claw so that the claw grips or releases the door latch, and a driving mechanism capable of driving the claw and the locking mechanism to move outward together, retract together, move relatively, or release the door latch. The present invention can effectively avoid bacterial contamination and intrusion of insects caused by the door cover being constantly open, so that an electric door opening process is aesthetically pleasing and fast, and a manual door opening process is labor-saving.

Description

Automatic opening and closing door type dishwasher locking device and dishwasher TECHNICAL FIELD

[0001] The present application relates to the technical field of dishwashers, in particular to the technical field of dishwasher locking devices. BACKGROUND

[0002] In recent years, with the improvement of living standards, dishwashers have gradually become indispensable appliances in the kitchen; after cleaning tableware, dishwashers usually dry the tableware; in order to achieve the purpose of drying tableware, the dishwasher needs to change the humid air in the washing cavity into dry air during the drying stage.

[0003] In the prior art, the dishwasher mainly connects the washing cavity with the outside through a ventilation system, so as to discharge the humid gas in the washing cavity to the outside of the dishwasher, and then replace the humid air inside with dry air outside; however, this method has the problem of high energy consumption; in order to reduce energy consumption, some manufacturers choose to replace the ventilation system drying with door opening drying (after automatically opening the door cover, natural convection is used to realize the air replacement between the inside and outside of the dishwasher), such as the control method of a dishwasher and the dishwasher disclosed in the patent CN114642388A.

[0004] However, the dishwasher with automatic door opening and drying design in the prior art cannot automatically close the door after drying, which may cause the problem of bacteria penetration or insect invasion and recontamination of tableware after the door is opened for a long time; in addition, for such a dishwasher, when the user operates the electric door opening function, the door lock usually needs to first extend the push rod to push open the door cover and then retract the push rod, which has the problems of push rod exposure (poor appearance) and slow door opening speed; when the user manually opens the door of such a dishwasher, he often needs to overcome the large locking force of the door lock (the door opening process is relatively difficult). SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art, and to provide an automatic opening and closing door type dishwasher locking device and dishwasher, which can effectively avoid the occurrence of bacterial contamination and insect invasion due to the constant opening of the door cover, and has an attractive and fast electric door opening process and a labor-saving manual door opening process.

[0006] To achieve the above-mentioned purpose, the present application provides an automatic opening and closing door type dishwasher locking device, which comprises a door lock and a door latch, the door lock and the door latch are respectively installed on the box body and the door cover of the dishwasher, the door lock has a locking mechanism which can grab or release the door latch by moving the pawl closer to or away from the door latch, and a driving mechanism which can drive the pawl and the locking mechanism to move outward together, to move inward together, to move relatively or to release the door latch.

[0007] As a preferred embodiment, the door cover can be opened by gravity or auxiliary opening force when the door latch is not grabbed by the pawl.

[0008] As a preferred, the locking mechanism comprises a locking plate and a driving plate, the locking plate and the driving plate can be connected by a clamping structure or be elastically connected by a connecting spring, the connecting spring can also be installed between the locking plate and the push rod.

[0009] As a preferred, the locking plate can be in contact with the pawl and provide a clamping force, when the driving plate drives the locking plate to separate from the pawl, the locking plate can cancel the clamping force on the pawl.

[0010] As a preferred, the shell of the door lock is provided with an opening, the pawl, the locking plate and the driving plate are sequentially arranged from outside to inside along the opening, the pawl is hinged on the push rod, the locking plate and the driving plate are respectively slidably connected with the push rod, and the driving plate is directly driven by the driving mechanism.

[0011] As a preferred, the pawl is composed of a pair of clamping fingers, the inner ends of the two clamping fingers are respectively provided with guide inclined surfaces, the interval between the two guide inclined surfaces gradually decreases from inside to outside, and the outer end of the locking plate is provided with an outward convex guide arc surface, the guide arc surface and the two guide inclined surfaces jointly form a clamping structure.

[0012] As a preferred, the outer ends of the two clamping fingers are respectively provided with oppositely bent hook parts, the door bolt has a rhombic door tongue, and the tip of the door tongue is arranged towards the gap between the two hook parts.

[0013] As a preferred, the inner end of the driving plate is further provided with a rebound spring, the driving plate is further provided with a pull rod capable of electrically pulling the locking plate, the adjacent surfaces of the locking plate and the driving plate are respectively provided with a first blind hole and a second blind hole capable of inserting the connecting spring, and the inner end of the driving plate is further provided with a third blind hole capable of inserting the rebound spring.

[0014] As a preferred, the driving mechanism comprises a motor, a worm, a turbine and a plurality of transmission gears, the worm is coaxially fixed at the output shaft of the motor, the turbine and the transmission gears are respectively rotatably connected with the shell through rotating shafts, each transmission gear is sequentially arranged and engaged between the driving plate and the turbine, the turbine is simultaneously engaged with the worm and one of the transmission gears, and the driving plate is engaged with another transmission gear.

[0015] A dishwasher is installed with the automatic opening and closing door type dishwasher locking device.

[0016] The beneficial effects of the present application are as follows:

[0017] 1) The present application installs a door lock with a pawl, a locking mechanism and a driving mechanism on the cabinet, on one hand, the pawl and the locking mechanism are driven by the driving mechanism to be close to or away from each other to enable the pawl to clamp or release the door latch, thereby realizing the locking or unlocking between the cabinet and the door cover, on the other hand, the pawl and the locking mechanism are driven by the driving mechanism to move out or recover together under the condition of being engaged, thereby enabling the dishwasher to automatically close the door after the opening-door drying process is completed, effectively avoiding the occurrence of bacterial contamination and insect crawling into due to the constant opening of the door cover;

[0018] 2) The present application can release the clamping force of the pawl when the user enables the electric door opening function, so that the door cover is automatically tilted and opened outward under the action of its own weight or auxiliary door opening force, and during the entire electric door opening action, on one hand, the user cannot see the pawl and other components extending (good working appearance), on the other hand, the extension time and recovery time of the pawl and other components are saved, thereby effectively improving the electric door opening action speed;

[0019] 3) For the present application, the user does not need to overcome the operating force of the door lock when manually opening the door after automatic opening, which is very labor-saving.

[0020] The features and advantages of the present application will be described in detail in conjunction with the embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a perspective structural schematic view of the dishwasher in a locked door state;

[0022] Fig. 2 is an internal working schematic view of the automatic opening and closing type dishwasher locking device when the dishwasher is in a locked door state;

[0023] Fig. 3 is a perspective structural schematic view of the dishwasher in an electrically opened door ventilation state;

[0024] Fig. 4 is an internal working schematic view of the automatic opening and closing type dishwasher locking device when the dishwasher is in an electrically opened door ventilation state;

[0025] Fig. 5 is an internal working schematic view of the automatic opening and closing type dishwasher locking device when the dishwasher is manually closed;

[0026] Fig. 6 is an internal working schematic view of the automatic opening and closing type dishwasher locking device when the dishwasher is manually opened;

[0027] Fig. 7 is an internal working schematic view of the automatic opening and closing type dishwasher locking device after the dishwasher is manually opened;

[0028] Fig. 8 is a perspective structural schematic view of the dishwasher in an electrically unlocked state;

[0029] Fig. 9 is an internal working schematic view of the automatic opening and closing type dishwasher locking device when the dishwasher is electrically opened.

[0030] Fig. 1-1 door lock, 11-outer shell, 111-opening, 12-pawl, 121- guide slope, 122-hook part, 13-locking mechanism, 131-locking plate, 1311- guide camber, 1312-first blind hole, 132-driving plate, 1321-second blind hole, 1322- third blind hole, 133-connection plate spring, 134-rebound spring, 135-pull rod, 14- driving mechanism, 141-motor, 142-worm, 143-turbine, 144-transmission gear, 15- push rod, 2-door latch, 21-door tongue, 3-box, 4-door cover. DETAILED DESCRIPTION

[0031] Referring to Figs. 1-9, the automatic opening and closing door type dishwasher locking device of the present application comprises a door lock 1 and a door latch 2, which are respectively installed on a box 3 and a door cover 4 of the dishwasher, the door lock 1 has a locking mechanism 13 capable of grabbing or releasing the door latch 2 by approaching or moving away from the pawl 12, and a driving mechanism 14 capable of driving the pawl 12 and the locking mechanism 13 to move out together, to move in together, to move relatively or to release the door latch 2.

[0032] The door cover 4 can be opened by gravity or auxiliary door opening force when the door latch 2 is not grabbed by the pawl 12.

[0033] The locking mechanism 13 comprises a locking plate 131 and a driving plate 132, which can be connected by a clamping structure or elastically connected by a connection plate spring 133, and the connection plate spring 133 can also be installed between the locking plate 131 and the push rod 15.

[0034] The locking plate 131 can be in contact with the pawl 12 and provide a grabbing force, and when the driving plate 132 drives the locking plate 131 to move away from the pawl 12, the locking plate 131 can cancel the grabbing force on the pawl 12.

[0035] The outer shell 11 of the door lock 1 is provided with an opening 111, the pawl 12, the locking plate 131 and the driving plate 132 are sequentially arranged from outside to inside along the opening 111, the pawl 12 is hinged on the push rod 15, the locking plate 131 and the driving plate 132 are respectively slidably connected with the push rod 15, and the driving plate 132 is directly driven by the driving mechanism 14.

[0036] The pawl 12 is composed of a pair of clamping fingers, the inner ends of the two clamping fingers are respectively provided with guide slopes 121, the distance between the two guide slopes 121 gradually decreases from inside to outside, the outer end of the locking plate 131 is provided with an outward convex guide camber 1311, and the guide camber 1311 and the two guide slopes 121 jointly form a clamping structure.

[0037] The outer ends of the two clamping fingers are respectively provided with opposite bent hook portions 122, and the door latch 2 is provided with a diamond-shaped door tongue 21, the tip of which is arranged towards the gap between the two hook portions 122.

[0038] The inner end of the driving plate 132 is further provided with a rebound spring 134, and the driving plate 132 is further provided with a pull rod 135 capable of electrically pulling the locking plate 131, the adjacent surfaces of the locking plate 131 and the driving plate 132 are respectively provided with a first blind hole 1312 and a second blind hole 1321 capable of inserting the connecting plate spring 133, and the inner end of the driving plate 132 is further provided with a third blind hole 1322 capable of inserting the rebound spring 134.

[0039] The driving mechanism 14 comprises a motor 141, a worm 142, a turbine 143 and a plurality of transmission gears 144, the worm 142 is coaxially fixed at the output shaft of the motor 141, the turbine 143 and the plurality of transmission gears 144 are respectively rotatably connected with the shell 11 through rotating shafts, each transmission gear 144 is arranged in sequence and engaged between the driving plate 132 and the turbine 143, the turbine 143 is simultaneously engaged with the worm 142 and one of the transmission gears 144, and the driving plate 132 is engaged with another transmission gear 144.

[0040] The dishwasher is provided with the automatic opening and closing door type dishwasher locking device.

[0041] The working process of the dishwasher is as follows:

[0042] When the door cover 4 closes the washing chamber of the box body 3, if it is needed to adjust the dishwasher to the locked door state, the locking mechanism 13 can be driven to move outward by the driving mechanism 14, as shown in FIGS. 1 and 2, at this time, the locking plate 13 forces the inner ends of the two clamping fingers of the pawl 12 to move away from each other through the guide arc surface 1311 and the two guide inclined surfaces 121, and simultaneously, the outer ends of the two clamping fingers of the pawl 12 are made to move close to each other by the lever principle (the door tongue 21 can be clamped by the two hook portions 122), so as to realize the locking between the box body 3 and the door cover 4; that is, the locking force of the locking plate 13 can make the pawl 12 tightly hold the door tongue 21 (prevent the door tongue 21 from being taken out), so as to ensure that the door cover 4 is in the closed door state.

[0043] When the dishwasher needs to be opened to ventilate, the pawl 12 and the locking plate 13 are driven to move outward together in the state of being kept clamped (from FIG. 2 to FIG. 4); at this time, the door cover 4 is opened by a specified angle relative to the box body 3 (see FIG. 3), so that the internal water vapor of the dishwasher can be smoothly discharged; after the ventilation of the dishwasher is completed, the pawl 12 and the locking plate 13 are driven to be recovered together in the state of being kept clamped (from FIG. 4 to FIG. 2).

[0044] The user can manually open and close the door of the dishwasher; in particular, when manually closing the door, as shown in Fig. 5, the door tongue 21 can push the pawl 12 apart, so that the pawl 12 drives the locking plate 131 to overcome the elastic force of the connecting plate spring 133 (as shown in Fig. 2 after closing the door); when manually opening the door, as shown in Fig. 6, the door tongue 21 can push the pawl 12 apart, so that the pawl 12 drives the locking plate 131 to overcome the elastic force of the connecting plate spring 133 (as shown in Fig. 7 after opening the door).

[0045] When the door cover 4 closes the washing chamber of the box body 3, if the dishwasher needs to be automatically opened, as shown in Fig. 9, the locking mechanism 13 can be driven by the driving mechanism 14 to move inward; at this time, the push rod and the shell are in contact and the push rod (the displacement of the pawl and the push rod is fixed) remains stationary, the driving plate 132 continues to move inward under the driving action of the driving mechanism 14 to overcome the elastic force of the rebound spring 134, and the locking plate 131 will be synchronously moved inward under the pulling action of the driving plate 132, so that the locking plate 131 and the pawl 12 are disengaged (since the pawl 12 is not under stress, the door tongue 21 can freely exit from the pawl 12), thereby completing the automatic opening action (see Fig. 8).

[0046] In addition, during the electric opening operation, the pull rod 135 can also achieve unhooking and opening the door by electrically pulling down the locking plate 131.

[0047] The above embodiments are illustrative of the present application and are not limiting of the present application, and any simple transformation of the present application also falls within the protection scope of the present application.

Claims

1. An automatic door opening and closing type dishwasher lock device comprising a door lock (1) and a door latch (2), said door lock (1) and door latch (2) being installed on a cabinet (3) and a door cover (4) of a dishwasher, respectively, characterized in that: The door lock (1) has a locking mechanism (13) capable of clamping or releasing the door bolt (2) by approaching or moving away from the pawl (12) and a driving mechanism (14) capable of driving the pawl (12) and the locking mechanism (13) to move outwards, move inwards, move oppositely or release the door bolt (2) together.

2. The automatic door closer type dishwasher locking device according to claim 1, wherein: The door cover (4) can be opened by gravity or auxiliary opening force when the door bolt (2) is not clamped by the pawl (12).

3. The automatic swing door type dishwasher lockout device of claim 1, wherein: The locking mechanism (13) includes a locking plate (131) and a driving plate (132), and the locking plate (131) and the driving plate (132) are connected by a clamping structure or elastically connected by a connecting plate spring (133), which can also be installed between the locking plate (131) and the push rod (15).

4. The automatic door closer type dishwasher locking device according to claim 3, wherein: The locking plate (131) can be in contact with the pawl (12) and provide clamping force, and when the driving plate (132) drives the locking plate (131) to separate from the pawl (12), the locking plate (131) can cancel the clamping force on the pawl (12).

5. The automatic swing door type dishwasher lockout device of claim 4, wherein: The housing (11) of the door lock (1) is provided with an opening (111), the pawl (12), the locking plate (131) and the driving plate (132) are arranged in sequence from outside to inside along the opening (111), the pawl (12) is hinged on the push rod (15), the locking plate (131) and the driving plate (132) are respectively connected with the push rod (15) in a sliding manner, and the driving plate (132) is directly driven by the driving mechanism (14).

6. The automatic swing door type dishwasher lockout device of claim 5, wherein: The pawl (12) is composed of a pair of clamping fingers, the inner ends of the two clamping fingers are respectively provided with guide inclined surfaces (121), the distance between the two guide inclined surfaces (121) gradually decreases from inside to outside, the outer end of the locking plate (131) is provided with an outwardly convex guide arc surface (1311), and the guide arc surface (1311) and the two guide inclined surfaces (121) jointly form a clamping structure.

7. The automatic swing door type dishwasher lockout device of claim 6, wherein: The outer ends of the two clamping fingers are respectively provided with oppositely bent hook portions (122), the door bolt (2) has a door tongue (21) in the shape of a rhombus, and the tip of the door tongue (21) is arranged towards the gap between the two hook portions (122).

8. The automatic swing door type dishwasher lockout device of claim 5, wherein: The inner end of the driving plate (132) is further provided with a rebound spring (134), the driving plate (132) is further provided with a pull rod (135) capable of electrically pulling the locking plate (131), the adjacent surfaces of the locking plate (131) and the driving plate (132) are respectively provided with a first blind hole (1312) and a second blind hole (1321) for inserting the connecting plate spring (133), and the inner end of the driving plate (132) is further provided with a third blind hole (1322) for inserting the rebound spring (134).

9. The automatic swing door type dishwasher lockout device of claim 5, wherein: The driving mechanism (14) comprises a motor (141), a worm (142), a turbine (143) and a transmission gear (144), the worm (142) is coaxially fixed at the output shaft of the motor (141), the turbine (143) and several transmission gears (144) are rotatably connected with the shell (11) through rotating shafts respectively, each transmission gear (144) is arranged in sequence and engaged between the driving plate (132) and the turbine (143), the turbine (143) is engaged with the worm (142) and one of the transmission gears (144) simultaneously, and the driving plate (132) is engaged with another transmission gear (144).

10. A dishwasher characterised in that: An automatic opening and closing type dishwasher lock device according to any one of claims 1 to 9 is installed.

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