Automatic door opening device and dish washing machine

Abstract

The automatic door opening device comprises a top door assembly and a door lock catch, the top door assembly comprises a shell, a push rod, a lead screw and a driving motor, the push rod, the lead screw and the driving motor are mounted in the shell, the push rod sleeves the lead screw and is in threaded connection with the lead screw, and the driving motor is in transmission connection with the lead screw; the control module is used for controlling the push rod to do telescopic motion relative to the shell; the door lock catch is provided with a lock plate, and the lock plate is arranged on the motion path of the push rod; wherein the automatic door opening device has a door closing state and a door opening state, in the door closing state, the lock plate is inserted into the shell, and in the door opening state, the lock plate is separated from the shell, and the push rod retracts into the shell. In this way, the automatic door opening function can be achieved when the automatic door opening device works, the operation experience feeling of a user using the dish-washing machine with the automatic door opening device is improved, and the use requirement for heat steam exhaust of the dish-washing machine is met; in addition, damage to the push rod caused by accidental door closing can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field related to dishwashers, and particularly relates to an automatic door opening device and a dishwasher. Background Art

[0002] Unlike domestic dishwashers that rely on hot air to force drying of dishes, export-oriented dishwashers generally rely on residual heat to dry dishes due to requirements for energy efficiency indicators, and the door is manually opened at an angle of about 30° to discharge the hot steam in the dishwasher tank. At present, the common door locks of existing dishwashers are installed on the dishwasher tank, and the door buckles are installed on the door. When the door is closed, the dishwasher starts working, and when the washing is finished, the dishwasher stops working. At this time, someone needs to open the door so that the steam in the dishwasher can be discharged, thereby achieving residual heat drying of the dishes. Since the door needs to be opened manually, this will reduce the user's operating experience. Utility Model Content

[0003] In view of this, it is necessary to provide an automatic door opening device and a dishwasher for solving the above-mentioned technical problems.

[0004] An automatic door opening device is used in a dishwasher, and the automatic door opening device comprises:

[0005] The top door assembly comprises a housing, a push rod installed in the housing, a lead screw and a drive motor, wherein the push rod is sleeved on the lead screw and threadedly connected to the lead screw, and the drive motor is drivingly connected to the lead screw and is used to control the push rod to perform telescopic movement relative to the housing;

[0006] A door lock catch having a lock plate, wherein the lock plate is arranged on the movement path of the push rod;

[0007] The automatic door opening device has a door closing state and a door opening state. In the door closing state, the lock plate is inserted into the shell. In the door opening state, the lock plate is detached from the shell and the push rod is retracted into the shell.

[0008] It can be understood that the lock plate is driven out of the shell by controlling the push rod to push the lock plate using a driving motor, thereby realizing the function of automatically opening the door when the automatic door opening device is working, thereby improving the user's operating experience of the dishwasher with the automatic door opening device and meeting the demand for the use of heat exhaust steam from the dishwasher; in addition, since the push rod is retracted into the shell when the automatic door opening device is in the open state, damage to the push rod caused by accidental door closing can be prevented.

[0009] In one embodiment, the locking plate can be separated from the housing when pushed by the push rod;

[0010] Wherein, the automatic door opening device also includes a first sensor, which is installed in the shell and electrically connected to the drive motor; and the first sensor can be triggered by the push rod to control the drive motor to drive the screw to rotate in reverse.

[0011] It can be understood that the first sensor is triggered by the push rod to control the retraction of the push rod after it extends out of the housing, so that the push rod can be retracted in time after pushing the locking plate out of the housing.

[0012] In one of the embodiments, the automatic door opening device further comprises a second sensor, which is installed in the housing and electrically connected to the drive motor;

[0013] The second sensor can be triggered by the push rod to control the drive motor to stop the rotational drive of the lead screw.

[0014] In one of the embodiments, the automatic door opening device further includes a third sensor, and the third sensor is installed in the housing;

[0015] In the door closing state, the third sensor can be triggered by the lock plate.

[0016] In one embodiment, the top door assembly further includes a slider and an elastic member, wherein the slider is slidably mounted in the housing and abuts against the elastic member;

[0017] The lock plate is provided with a groove, and in the door closing state, the slider can be pressed against the groove wall of the groove under the push of the elastic member, so as to provide a damping force for the sliding of the lock plate in the housing.

[0018] It can be understood that the slider is used to provide a damping force to the sliding of the lock plate in the shell, so that the lock plate can resist the action of a certain external force and improve the stability of the lock plate when it is inserted into the shell.

[0019] In one embodiment, the slider has an arc-shaped guide surface, and both the locking plate and the push rod can push the slider through the arc-shaped guide surface and compress the elastic member.

[0020] In one of the embodiments, a buffer is provided on the push rod, and the buffer can push the locking plate under the drive of the push rod.

[0021] It is understandable that the buffer member plays a buffering role on the pushing between the push rod and the lock plate, which can reduce the noise generated when the automatic door opening device is working and protect the contact part between the push rod and the lock plate.

[0022] In one of the embodiments, a guide block is disposed on the housing, and the guide block is slidably connected to the push rod.

[0023] It can be understood that, by utilizing the sliding connection between the slider and the push rod, the slider can not only support the push rod, but also guide the movement direction of the push rod during its telescopic movement.

[0024] In one embodiment, the top door assembly further comprises a reduction gear set, and the reduction gear set is fixedly mounted in the housing;

[0025] Wherein, the driving motor can be connected to the lead screw through the reduction gear set.

[0026] It can be understood that the reduction gear set is used to realize the transmission connection between the drive motor and the lead screw, so that the push rod can be driven to slide quickly, so that the push rod can be retracted into the housing in time.

[0027] The present application also seeks protection for a dishwasher, comprising a dishwasher body, a dishwasher door, and the automatic door opening device described above; the top door assembly is fixedly mounted on the dishwasher body, and the door lock is fixedly mounted on the dishwasher door.

[0028] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0029] The automatic door opening device and washing machine for which protection is sought in the present application utilize a driving motor to control a push rod to push the lock plate, thereby driving the lock plate to separate from the shell. This enables the automatic door opening function when the automatic door opening device is working, thereby improving the user's operating experience of a dishwasher equipped with the automatic door opening device and meeting the demand for exhaust steam from the dishwasher. In addition, because the push rod is retracted into the shell when the automatic door opening device is in the open state, this can prevent damage to the push rod caused by accidental door closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is an exploded view of an automatic door opening device provided in one embodiment of the present application.

[0032] Figure 2 A schematic diagram of the partial structure of an automatic door opening device provided in one embodiment of the present application.

[0033] Figure 3 for Figure 2 Enlarged view of the middle P part.

[0034] Figure 4 This is another partial structural schematic diagram of the automatic door opening device provided in one embodiment of the present application.

[0035] Figure 5 A schematic structural diagram of another state of the automatic door opening device provided in one embodiment of the present application.

[0036] 1. Reference numerals: 100, automatic door opening device; 10, top door assembly; 11, shell; 110, connecting piece; 111, upper shell; 112, lower shell; 12, push rod; 121, buffer; 122, convex plate; 13, lead screw; 14, drive motor; 15, guide block; 16, reduction gear set; 17, slider; 171, arc guide surface; 18, elastic piece; 20, door lock; 21, lock plate; 211, groove; 2111, groove wall; 101, first sensor; 102, second sensor; 103, third sensor; 201, first PCB board; 202, second PCB board. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that when an element is referred to as being "provided on" another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be "provided on" another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or there may be a central element at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] like Figures 1 to 5As shown, an automatic door opening device 100 provided in an embodiment of the present application includes a top door assembly 10 and a door lock 20, the top door assembly 10 includes a shell 11, a push rod 12 installed in the shell 11, a lead screw 13 and a drive motor 14, the push rod 12 is sleeved on the lead screw 13 and screwed with the lead screw 13, the drive motor 14 is transmission-connected with the lead screw 13, and is used to control the push rod 12 to make a telescopic movement relative to the shell 11; the door lock 20 has a lock plate 21, and the lock plate 21 is arranged on the movement path of the push rod 12; wherein, the automatic door opening device 100 has a door closing state and a door opening state, in the door closing state, the lock plate 21 is inserted into the shell 11, and in the door opening state, the lock plate 21 is detached from the shell 11, and the push rod 12 is retracted into the shell 11.

[0041] It can be understood that the lock plate 21 is driven away from the shell 11 by controlling the push rod 12 to push the lock plate 21 using the drive motor 14, so that the automatic door opening function of the automatic door opening device 100 can be realized when it is working, which improves the user's operating experience of the dishwasher using the automatic door opening device 100 and meets the demand for the use of the dishwasher's exhaust steam; in addition, because the automatic door opening device 100 is in the open state, the push rod 12 is retracted into the shell 11, which can prevent the push rod 12 from being damaged due to accidental closing of the door.

[0042] like Figure 1 As shown, the housing 11 includes an upper housing 111 and a lower housing 112. The upper housing 111 can be covered on the lower housing 112, and the upper housing 111 and the lower housing 112 can be fixedly connected by a connecting member 110 such as a screw or a bolt. Of course, in other embodiments, the upper housing 111 and the lower housing 112 can also be fixed by ultrasonic welding.

[0043] like Figures 2 to 5 As shown, a buffer 121 is provided on the push rod 12, and the buffer 121 can push the lock plate 21 under the drive of the push rod 12. In other words, the buffer 121 can play a buffering role in the push between the push rod 12 and the lock plate 21, preventing the push rod 12 and the lock plate 21 from colliding with each other, thereby reducing the noise generated when the automatic door opening device 100 is working, and protecting the contact part between the push rod 12 and the lock plate 21. Here, the buffer 121 can be made of a soft material with buffering performance such as rubber and polyurethane.

[0044] like Figure 2 , Figure 3 As shown, a guide block 15 is provided on the shell 11, and the guide block 15 is slidably connected to the push rod 12. In this way, the sliding connection between the guide block 15 and the push rod 12 is utilized so that the guide block 15 can not only support the push rod 12, but also guide the movement direction of the push rod 12 during telescopic movement.

[0045] like Figure 1 , Figure 2 and Figure 4 As shown, the top door assembly 10 also includes a reduction gear set 16, which is fixedly installed in the housing 11; wherein the drive motor 14 can be connected to the lead screw 13 through the reduction gear set 16. In this way, the reduction gear set 16 can adjust the speed of the drive motor 14 when driving the lead screw 13, so that the push rod 12 can be driven to slide quickly, so that the push rod 12 can be retracted into the housing 11 in time. It should be noted that the size and structural composition of the drive motor 14 and the reduction gear set 16 can be specifically set according to the needs of use, and will not be elaborated here.

[0046] like Figures 1 to 3 As shown, the top door assembly 10 also includes a slider 17 and an elastic member 18. The slider 17 is slidably installed in the housing 11 and abuts against the elastic member 18. A groove 211 is provided on the lock plate 21. In the closed state, the slider 17 can abut against the groove wall 2111 of the groove 211 under the push of the elastic member 18, so as to provide a damping force for the sliding of the lock plate 21 in the housing 11. The lock plate 21 needs to overcome the damping force of the slider 17 before it can slide in the housing 11, that is, the door lock 20 can resist the action of a certain external force and improve the stability of the lock plate 21 when inserted into the housing 11. Here, the movement direction of the slider 17 when sliding in the housing 11 is perpendicular to the movement direction of the lock plate 21 when sliding in the housing 11, wherein the elastic member 18 is configured as a spring, or other bellows with high elasticity, rubber sleeve, etc.

[0047] like Figure 2 , Figure 3 As shown, the slider 17 has an arc-shaped guide surface 171, and the lock plate 21 and the push rod 12 can both push the slider 17 through the arc-shaped guide surface 171 and compress the elastic member 18. In this way, by using the guidance of the arc-shaped guide surface 171, the lock plate 21 and the push rod 12 can both pass through the slider 17 smoothly, and the use requirement of the push rod 12 pushing the lock plate 21 is met.

[0048] like Figures 1 to 3 As shown, the number of sliders 17 is configured to be two, and the two sliders 17 are symmetrically separated on two opposite sides of the lock plate 21 or the push rod 12, and the two sliders 17 can abut against the push rod 12 at the same time, which can increase the damping force of the lock plate 21 when it slides in the housing 11.

[0049] like Figure 1 , Figure 2 and Figure 4As shown, the automatic door opening device 100 further includes a first sensor 101, which is installed in the housing 11 and electrically connected to the drive motor 14; and the first sensor 101 can be triggered by the push rod 12, and is used to control the drive motor 14 to reversely drive the lead screw 13 to rotate. In this way, the first sensor 101 can be triggered by the push rod 12 to control the retraction of the push rod 12 after it extends out of the housing 11, so that the push rod 12 can be retracted in time after the lock plate 21 is pushed out of the housing 11. Here, the first sensor 101 is configured as a micro switch, wherein a convex plate 122 is formed on the push rod 12, and the convex plate 122 triggers the first sensor 101 under the drive of the push rod 12. Of course, in other embodiments, the first sensor 101 can also be configured as other sensors such as a photoelectric switch and a pressure sensor, which will not be elaborated here.

[0050] like Figure 1 , Figure 2 and Figure 4 As shown, the automatic door opening device 100 also includes a second sensor 102, which is installed in the housing 11 and electrically connected to the drive motor 14; wherein the second sensor 102 can be triggered by the push rod 12, and is used to control the drive motor 14 to stop the rotation drive of the lead screw 13. In other words, the second sensor 102 can provide signal feedback when the push rod 12 is retracted into position. Here, the second sensor 102 is configured with the same structure as the first sensor 101, specifically a micro switch, and can also be triggered by the convex plate 122 on the push rod 12, wherein the second sensor 102 and the first sensor 101 are integrated into the first PCB board 201 of the top door assembly 10, and the first PCB board 201 can also be used to control the operation of the drive motor 14.

[0051] like Figures 1 to 4 As shown, the automatic door opening device 100 further includes a third sensor 103, which is installed in the housing 11; in the door closing state, the third sensor 103 can be triggered by the lock plate 21. In other words, the third sensor 103 can provide signal feedback of the door closing of the automatic door opening device 100. Here, the third sensor 103 can also be configured with the same structure as the second sensor 102 and the first sensor 101, specifically a micro switch, and the third sensor 103 can be integrated into a second PCB board 202 independent of the first PCB board 201.

[0052] In addition, the present application also provides a dishwasher, including a dishwasher body (not shown), a dishwasher door (not shown), and the above-mentioned automatic door opening device 100; the top door assembly 10 is fixedly installed on the dishwasher body, and the door lock 20 is fixedly installed on the dishwasher door. When the dishwasher is working, the top door assembly 10 can automatically push the dishwasher door away from the dishwasher body, and the dishwasher door is opened, so that the hot steam in the inner tank of the dishwasher body can be discharged to the outside, and the washed dishes can be dried.

[0053] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. An automatic door opening device, used in a dishwasher, characterized in that: The automatic door opening device (100) comprises: A top door assembly (10) comprises a housing (11), a push rod (12) installed in the housing (11), a lead screw (13) and a drive motor (14), wherein the push rod (12) is sleeved on the lead screw (13) and is screwed to the lead screw (13), and the drive motor (14) is transmission-connected to the lead screw (13) and is used to control the push rod (12) to perform telescopic movement relative to the housing (11); A door lock catch (20) having a lock plate (21), wherein the lock plate (21) is arranged on the movement path of the push rod (12); The automatic door opening device (100) has a door closing state and a door opening state. In the door closing state, the lock plate (21) is inserted into the shell (11). In the door opening state, the lock plate (21) is detached from the shell (11) and the push rod (12) is retracted into the shell (11).

2. The automatic door opening device according to claim 1, characterized in that: The locking plate (21) can be separated from the housing (11) when pushed by the push rod (12); Wherein, the automatic door opening device (100) further includes a first sensor (101), which is installed in the housing (11) and electrically connected to the drive motor (14); and the first sensor (101) can be triggered by the push rod (12) to control the drive motor (14) to drive the screw (13) to rotate in reverse.

3. The automatic door opening device according to claim 1, characterized in that: The automatic door opening device (100) further comprises a second sensor (102), wherein the second sensor (102) is installed in the housing (11) and is electrically connected to the drive motor (14); The second sensor (102) can be triggered by the push rod (12) to control the drive motor (14) to stop.

4. The automatic door opening device according to claim 1, characterized in that: The automatic door opening device (100) further comprises a third sensor (103), wherein the third sensor (103) is installed in the housing (11); In the door closing state, the third sensor (103) can be triggered by the lock plate (21).

5. The automatic door opening device according to claim 1, characterized in that: The top door assembly (10) further comprises a sliding block (17) and an elastic member (18); the sliding block (17) is slidably mounted in the housing (11) and abuts against the elastic member (18); The lock plate (21) is provided with a groove (211), and in a door closing state, the slider (17) can be pressed against a groove wall (2111) of the groove (211) under the push of the elastic member (18), so as to provide a damping force for the lock plate (21) to slide in the housing (11).

6. The automatic door opening device according to claim 5, characterized in that: The slider (17) has an arc-shaped guide surface (171), and the locking plate (21) and the push rod (12) can both push the slider through the arc-shaped guide surface (171) and compress the elastic member (18).

7. The automatic door opening device according to claim 1, characterized in that: The push rod (12) is provided with a buffer member (121), and the buffer member (121) can push the locking plate (21) under the drive of the push rod (12).

8. The automatic door opening device according to claim 1, characterized in that: The housing (11) is provided with a guide block (15), and the guide block (15) is slidably connected to the push rod (12).

9. The automatic door opening device according to claim 1, characterized in that: The top door assembly (10) further comprises a reduction gear set (16), wherein the reduction gear set (16) is fixedly mounted in the housing (11); Wherein, the driving motor (14) can be transmission-connected to the lead screw (13) via the reduction gear set (16).

10. A dishwasher, characterized in that: A dishwasher body, a dishwasher door, and the automatic door opening device (100) according to any one of claims 1 to 9; the top door assembly (10) is fixedly mounted on the dishwasher body, and the door lock (20) is fixedly mounted on the dishwasher door.

Images