CN114961445B

CN114961445B - Interlocking device of microwave oven and microwave oven

Info

Publication number: CN114961445B
Application number: CN202210623214.9A
Authority: CN
Inventors: 位帅帅; 吴延岐
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2023-11-24
Anticipated expiration: 2042-06-01
Also published as: CN114961445A

Abstract

The invention discloses an interlocking device of a microwave oven and the microwave oven, wherein the interlocking device comprises: a first door hook; the interlocking bracket is provided with a monitoring switch, a first micro switch and a second micro switch; the first lever and the second lever are respectively rotatably arranged on the interlocking bracket, wherein the first door hook sequentially drives the first lever and the second lever to rotate in the door closing process of the microwave oven, so that after the first lever triggers the monitoring switch, the second lever sequentially triggers the first micro switch and the second micro switch. According to the interlocking device of the microwave oven, the problem that the triggering sequence of a plurality of switch pieces is disordered can be avoided, the accurate detection of the opening and closing states of the door body is ensured, the circuit damage of the microwave oven and even the occurrence of safety accidents are avoided, and the service life of the microwave oven is prolonged.

Description

Interlocking device of microwave oven and microwave oven

Technical Field

The present invention relates to the technical field of microwave ovens, and more particularly, to an interlock device of a microwave oven and a microwave oven.

Background

In the related art, the micro-switch layout mode adopted by the microwave oven is that an upper door hook of a movable door hook controls a primary micro-switch when the door is closed, and a lower door hook controls a secondary micro-switch and monitors the micro-switch. However, in the above manner of triggering the micro-switch, the triggering sequence of the micro-switch is easy to be confused in the door closing process, so that the microwave oven has potential safety hazard or service life is influenced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an interlock device for a microwave oven, which can prevent a disorder of the triggering sequence of switching elements.

Another object of the present invention is to provide a microwave oven having the above-mentioned interlock device.

According to an embodiment of the invention, an interlock device for a microwave oven includes: a first door hook; the interlocking bracket is provided with a monitoring switch, a first micro switch and a second micro switch; the first lever and the second lever are respectively rotatably arranged on the interlocking bracket, wherein the first door hook sequentially drives the first lever and the second lever to rotate in the door closing process of the microwave oven, so that after the first lever triggers the monitoring switch, the second lever sequentially triggers the first micro switch and the second micro switch.

According to the interlocking device of the microwave oven, through the driving of the first door hook and the orderly transmission of the first lever and the second lever, the monitoring switch, the first micro switch and the second micro switch are sequentially triggered, the problem that the triggering sequence of a plurality of switch pieces is disordered is avoided, the accurate detection of the opening and closing state of the door body is ensured, the circuit damage of the microwave oven is avoided, even safety accidents occur, and the service life of the microwave oven is prolonged.

In addition, the interlocking device of the microwave oven according to the above embodiment of the present invention may further have the following additional technical features:

according to some embodiments of the invention, the rotating shaft of the first lever is disposed on a side of the rotating shaft of the second lever, which is close to the first door hook.

According to some embodiments of the invention, the rotation axis of the first lever and the rotation axis of the second lever are respectively located at two sides of the first door hook perpendicular to the door closing direction.

According to some embodiments of the invention, the first lever comprises: the first driving arm is provided with a first driving part for triggering the monitoring switch, and in the door closing process, the first door hook abuts against the first driving arm to drive the first lever to rotate along a first direction.

According to some embodiments of the invention, the first lever further comprises: the second driving arm is positioned on one side, close to the first door hook, of the first driving arm, the first door hook extends between the first driving arm and the second driving arm in the door closing process, and in the door opening process, the first door hook abuts against the second driving arm to drive the first lever to rotate along a second direction, and the second direction is opposite to the first direction.

According to some embodiments of the invention, the interlock further comprises: the elastic piece is connected with the interlocking support and the first lever and is provided with a first driving state, and in the first driving state, the elastic piece applies driving force rotating along the first direction to the first lever so that the second driving arm drives the first door hook to move along the door closing direction.

According to some embodiments of the invention, the elastic member further has a second driving state in which the elastic member applies a driving force to the first lever to rotate in the second direction, and the first hook is adapted to abut against the first driving arm to switch the elastic member from the second driving state to the first driving state during the closing of the door.

According to some embodiments of the invention, the length of the second drive arm is less than the length of the first drive arm; and/or, in the axial direction of the first lever, the thickness of the second driving arm is smaller than that of the first driving arm.

According to some embodiments of the invention, the interlocking bracket is provided with a limiting part, and in a door closing state, the limiting part abuts against the first lever to prevent the first lever from rotating along the first direction.

According to some embodiments of the invention, the interlock further comprises: and the buffer door closing assembly is connected with the interlocking bracket and the first driving arm, and is used for applying buffer force opposite to the first direction to the first lever in the door closing process.

According to some embodiments of the invention, the damper door closing assembly includes: one end of the buffer piece is rotatably connected with the interlocking bracket; the connecting piece, first actuating arm has the driving surface, the connecting piece rotationally install in first actuating arm and with the driving surface is predetermine the angle, the other end of bolster with the connecting piece rotatable coupling, in the door closing process, first lever is followed the first direction rotates predetermine behind the angle, the driving surface with the connecting piece offsets in order to drive the connecting piece rotates.

According to some embodiments of the invention, the second lever comprises: the first door hook is suitable for being propped against the first rotating arm to drive the second lever to rotate along a second direction in the door closing process; the first rotating arm, the second rotating arm and the third rotating arm are sequentially arranged along the second direction, and the second rotating arm and the third rotating arm are respectively used for triggering the first micro switch and the second micro switch.

According to some embodiments of the invention, at least two of the first, second and third pivot arms are offset along an axial direction of the second lever.

According to some embodiments of the present invention, the interlocking bracket includes a bracket body and a cover body, the cover body and the bracket body cooperate to define an installation space, the first lever and the second lever are installed in the installation space, the monitoring switch is disposed on a side of the cover body facing away from the bracket body, the first lever is provided with a first driving portion for triggering the monitoring switch, and the cover body has a first through hole for passing through the first driving portion; one of the first micro-switch and the second micro-switch is arranged in the installation space, the other one of the first micro-switch and the second micro-switch is arranged on one side, opposite to the bracket body, of the cover body, a second driving part for triggering the first micro-switch is arranged on the second lever, and the cover body is provided with a second through hole for enabling the second driving part to pass through.

The microwave oven according to the embodiment of the invention comprises: the door body is arranged on the machine body; according to the interlocking device of the microwave oven, the first door hook is arranged on the door body, and the interlocking bracket is arranged on the machine body.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a right side view of a portion of a structure of a microwave oven according to an embodiment of the present invention, in which a door body is in a door-opened state;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a partial schematic view of the structure of FIG. 1, wherein the cover is not shown;

FIG. 4 is a schematic view of a partially enlarged structure of FIG. 3;

FIG. 5 is a left side view of FIG. 4;

fig. 6 is a right side view showing a partial structure of a microwave oven according to an embodiment of the present invention, in which a door body is in a closed state;

FIG. 7 is a left side view of FIG. 6;

fig. 8 is a partial structural schematic view of fig. 6, in which the cover is not shown;

FIG. 9 is a schematic view of the partially enlarged structure of FIG. 8;

Fig. 10 is a left side view of fig. 9;

fig. 11 is a schematic structural view of a cover, a first micro switch and a second micro switch according to an embodiment of the present invention;

FIG. 12 is a schematic view of the structure of an interlock bracket and a second lever according to an embodiment of the present invention;

FIG. 13 is an exploded view of FIG. 12;

fig. 14 is a schematic structural view of a first lever according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a first lever according to an embodiment of the present invention;

fig. 16 is a schematic structural view of a first lever according to an embodiment of the present invention;

fig. 17 is a schematic structural view of a second lever according to an embodiment of the present invention;

fig. 18 is a schematic structural view of a second lever according to an embodiment of the present invention.

Reference numerals:

a microwave oven 1000;

an interlock 100; a door body 200;

a first door hook 11; a second door hook 12;

an interlocking bracket 20; a monitor switch 201; a first microswitch 202; a second micro switch 203; a mounting space 204; a limiting part 21; a holder body 22; a third through hole 221; a first mounting post 222; a second mounting post 223; a cover 23; a first through hole 231; a second through hole 232;

a first lever 30; a first drive arm 31; a second drive arm 32; a first driving section 33; an elastic member 34; a connection portion 35; a drive surface 36; a groove 37; a hook 38; thinned region 39;

A second lever 40; a first rotating arm 41; a second rotating arm 42; a third rotating arm 43; a second driving section 44;

a cushioned door closing assembly 50; a buffer member 51; a connecting member 52; a driving member 53; and a bevel block 54.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the invention, "a first feature" may include one or more such features, and "a plurality" may mean two or more, and that a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact with each other through additional features therebetween, with the first feature "above", "over" and "above" the second feature including both the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature.

An interlock apparatus 100 of a microwave oven 1000 and a microwave oven 1000 having the same according to an embodiment of the present invention are described below with reference to the accompanying drawings.

Referring to fig. 1 to 10, a microwave oven 1000 according to an embodiment of the present invention may include a body, a door 200, and an interlock device 100 of the microwave oven 1000 according to an embodiment of the present invention. The door body 200 is mounted on the machine body, for example, rotatably mounted on the machine body, so as to realize opening and closing of the accommodating cavity of the machine body, and realize switching between a door opening state and a door closing state of the door body 200. The interlock device 100 can be switched to implement a corresponding function according to the state of the door body 200.

The interlock device 100 of the microwave oven 1000 according to an embodiment of the present invention may include: the first door hook 11, the interlocking bracket 20, the first lever 30, and the second lever 40.

Specifically, the first door hook 11 may be mounted to the door body 200 to move relative to the machine body according to the opening and closing operation of the door body 200. The interlocking bracket 20 is mounted on the machine body so as to be matched with the interlocking bracket 20 and components on the interlocking bracket 20 in the process of moving the first door hook 11 relative to the machine body.

Specifically, three switch elements, namely a monitoring switch 201, a first micro switch 202 and a second micro switch 203, are arranged on the interlocking bracket 20. Alternatively, the monitoring switch may be a micro switch. When the monitoring switch 201, the first micro switch 202 and the second micro switch 203 are triggered in sequence, it is determined that the door 200 is closed, and the microwave oven 1000 can be normally powered on and operated.

In the related art, the micro-switch layout mode adopted by the microwave oven is that the primary micro-switch is controlled by the upper door hook of the movable door hook when the door is closed, and the secondary micro-switch is indirectly controlled and the micro-switch is monitored by the lower door hook. However, in the above manner of triggering the micro-switch, the triggering sequence of the micro-switch is easy to be confused in the door closing process, so that the microwave oven has potential safety hazard or service life is influenced.

In the embodiment of the present invention, as shown in fig. 1 to 10, the first lever 30 is rotatably mounted to the interlocking bracket 20, and the second lever 40 is rotatably mounted to the interlocking bracket 20. In the process of closing the door of the microwave oven 1000, the first door hook 11 moves relative to the interlocking bracket 20 and drives the first lever 30 and the second lever 40 to rotate in sequence, so that after the first lever 30 triggers the monitoring switch 201, the second lever 40 triggers the first micro switch 202 and the second micro switch 203 in sequence.

Therefore, the sequential transmission of the monitoring switch 201, the first micro switch 202 and the second micro switch 203 is realized through the driving of the same door hook (namely, the driving of the first door hook 11) and the sequential transmission of the two levers (namely, the first lever 30 and the second lever 40), so that the problem that the triggering sequence of a plurality of switch pieces is disordered is avoided, the accurate detection of the opening and closing state of the door body 200 is ensured, the circuit damage of the microwave oven 1000 is avoided, even the safety accident is caused, and the service life of the microwave oven 1000 is prolonged.

For example, the door body 200 is rotatably mounted to the machine body about a vertically extending rotation axis, and the door body 200 rotates to move the first door hook 11 generally backward and forward in the front-rear direction as shown in fig. 1 with respect to the interlock bracket 20 during the closing of the door. During the moving process, the first door hook 11 first contacts with the first lever 30 on the interlocking bracket 20 and drives the first lever 30 to rotate along the first direction (anticlockwise direction as shown in fig. 1), and when the first lever 30 rotates to a preset angle, the first lever 30 triggers the monitoring switch 201. Then, the first door hook 11 contacts with the second lever 40 and drives the second lever 40 to rotate along the second direction (clockwise as shown in fig. 1), the first micro switch 202 is triggered when the second lever rotates to the first preset angle, and the second micro switch 203 is triggered when the second lever continues to rotate to the second preset angle. Thereby, sequential activation of the monitor switch 201, the first micro switch 202 and the second micro switch 203 is achieved.

It should be noted that, in the whole rotation process of the first lever 30 and the second lever 40, the first door hook 11 may be completely driven to rotate, or the first door hook 11 may provide an initial acting force to start rotating, and then rotate under the driving of other structures, which is within the scope of the present invention.

In addition, in some embodiments, the door body 200 of the microwave oven 1000 may further include a second door hook 12, for example, as shown in fig. 1-10, the first door hook 11 is a lower door hook, the second door hook 12 is an upper door hook, and the lower door hook is disposed on the lower side of the upper door hook. Of course, the door hook can also comprise a third door hook or more door hooks, and the plurality of door hooks are vertically and alternately distributed. In the embodiment comprising a plurality of door hooks, the first door hook 11 is matched with the two levers to indirectly trigger the three switch pieces, so that the switching order of the three switch pieces is ensured.

The first door hook 11 may be a fixed door hook, i.e. fixed relative to the door body 200, so that the first door hook 11 is stable in position and structure in the process of driving the first lever 30 and the second lever 40 to rotate, thereby avoiding affecting the orderly triggering of the micro switch due to the change of the position of the first door hook 11; the second door hook 12, the third door hook, and other door hooks may be fixed door hooks or movable door hooks, for example, door hooks rotatably or movably mounted to the door body 200.

According to the interlocking device 100 of the microwave oven 1000 in the embodiment of the invention, through the driving of the first door hook 11 and the orderly transmission of the first lever 30 and the second lever 40, the monitoring switch 201, the first micro switch 202 and the second micro switch 203 are sequentially triggered, the problem that the triggering sequence of a plurality of switch pieces is disordered is avoided, the accurate detection of the opening and closing state of the door body 200 is ensured, the circuit damage of the microwave oven 1000 is avoided, even the safety accident is avoided, and the service life of the microwave oven 1000 is prolonged.

Since the interlocking device 100 of the microwave oven 1000 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the microwave oven 1000 according to the embodiment of the present invention realizes that the monitoring switch 201, the first micro-switch 202 and the second micro-switch 203 are sequentially triggered by the driving of the first door hook 11 and the orderly transmission of the first lever 30 and the second lever 40, thereby avoiding the problem of disordered triggering sequence of a plurality of switch elements, ensuring accurate detection of the open and close state of the door body 200, avoiding circuit damage or even safety accidents of the microwave oven 1000, and being beneficial to improving the service life of the microwave oven 1000.

According to some embodiments of the present invention, as shown in fig. 1-10, the rotating shaft of the first lever 30 is disposed on one side of the rotating shaft of the second lever 40, which is close to the first door hook 11, for example, as shown in fig. 3 and 8, the rotating shaft of the first lever 30 is disposed on the front side of the rotating shaft of the second lever 40, and the first door hook 11 is disposed on the front side of the rotating shaft of the first lever 30, so that the first door hook 11 moves backward during the door closing process, and can contact with the first lever 30 first and then contact with the second lever 40, thereby avoiding the triggering disorder of the switch element.

According to some embodiments of the present invention, as shown in fig. 1 to 10, the rotation axis of the first lever 30 and the rotation axis of the second lever 40 are located at two sides of the first door hook 11 perpendicular to the closing direction, respectively. For example, as shown in fig. 3 and 8, the rotation axis of the first lever 30 is located at the upper side of the first door hook 11, and the rotation axis of the second lever 40 is located at the lower side of the first door hook 11. The arrangement mode ensures that the arrangement and rotation of the first lever 30 and the second lever 40 are not interfered with each other, the arrangement of the first lever 30 and the second lever 40 in the door closing direction (front and rear direction) is more compact, the length of the first door hook 11 can be in contact transmission with the first lever 30 and the second lever 40 without overlong arrangement, and the structure of the interlocking device 100 is more compact.

The specific structure of the first lever 30 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in fig. 14-16, the first lever 30 may include a first driving arm 31, the first driving arm 31 being provided with a first driving portion 33, the first driving portion 33 being used to trigger the monitoring switch 201. As shown in fig. 6 to 10, during the door closing process, the first door hook 11 may abut against the first driving arm 31 to drive the first driving arm 31 to rotate around the rotation axis of the first lever 30 along the first direction, so as to drive the first driving portion 33 to rotate, so that the first driving portion 33 can rotate to a position for triggering the monitoring switch 201, and the monitoring switch 201 is opened.

The position of the first driving portion 33 on the first driving arm 31 may be flexibly set according to the actual situation such as the spatial arrangement. For example, the first driving portion 33 may be provided at any position such as a middle portion or an end portion of the first driving arm 31 in the longitudinal direction of the first driving arm 31.

In some embodiments, the first driving portion 33 may be a protrusion disposed on one side of the first driving arm 31 along the axial direction, so that the first driving portion 33 is not interfered by the first driving arm 31 during the process of matching with the monitoring switch 201, and the risk of the first driving arm 31 touching the monitoring switch 201 by mistake is avoided.

In some embodiments of the present invention, as shown in fig. 14 to 16, the first lever 30 may further include a second driving arm 32, and the second driving arm 32 is located at a side of the first driving arm 31 near the first door hook 11, in other words, the first driving arm 31 is located at a leading side of the second driving arm 32 in the first direction.

During the door closing process, the first door hook 11 can extend between the first driving arm 31 and the second driving arm 32, so that the first door hook 11 can abut against the first driving arm 31 and drive the first lever 30 to start rotating along the first direction. In the door opening process, the first door hook 11 can abut against the second driving arm 32 to drive the first lever 30 to rotate along the second direction, and the second direction is opposite to the first direction, so that the first lever 30 can be disengaged from the monitoring switch 201, and the monitoring switch 201 can be closed.

Thus, the first door hook 11 can be used to drive the first lever 30 to rotate in two directions to trigger the monitor switch 201 and reset, which is beneficial to simplifying the structure of the interlock device 100. Of course, the structure for driving the first lever 30 to reset includes, but is not limited to, that the second driving arm 32 cooperates with the first door hook 11, for example, in other embodiments, a reset member such as a spring may be further provided to drive the first lever 30 to rotate in the second direction for reset after the first door hook 11 moves in the door opening direction.

According to some embodiments of the present invention, as shown in fig. 1-10, the interlock device 100 may further include an elastic member 34, the elastic member 34 connecting the interlock bracket 20 and the first lever 30. For example, the elastic member 34 may be a coil spring, and the coil spring may be one or more. For example, in the example shown in fig. 1 to 10, the elastic members 34 are tension springs, and as shown in fig. 15 and 16, the first lever 30 is provided with a connecting portion 35, and the connecting portion 35 is a protrusion provided on a side surface of the first lever 30 facing away from the first driving portion 33. One end of each tension spring is connected with the interlocking bracket 20, the other end is connected with the connecting part 35, and one ends of the two tension springs are spaced apart by a certain distance.

Further, the elastic member 34 has a first driving state. In the first driving state, the elastic member 34 applies a driving force to the first lever 30 to rotate in the first direction, so that the second driving arm 32 drives the first door hook 11 to move in the door closing direction.

Specifically, as shown in fig. 6 to 10, during the door closing process, the first door hook 11 moves in the door closing direction, moves between the first driving arm 31 and the second driving arm 32 and abuts against the first driving arm 31, so as to drive the first lever 30 to start rotating in the first direction; when the first lever 30 starts to rotate in the first direction or rotates by a small angle, the elastic member 34 is in the first driving state to automatically drive the first lever 30 to rotate in the first direction, so that the second driving arm 32 drives the first door hook 11 to move continuously in the door closing direction, and an automatic door closing effect is achieved. At this time, even if the user withdraws the door closing force to the door body 200, the door body 200 can be guaranteed to be closed in place, and the first door hook 11 can be guaranteed to move to the three switch pieces in the door closing direction to be triggered. On the one hand, the operation of the user is labor-saving and convenient, and on the other hand, the problem that the door is not closed in place can be avoided.

In some embodiments, as shown in fig. 1-5, the resilient member 34 has a second driving state. In the second driving state, the elastic member 34 applies a driving force to the first lever 30 to rotate in the second direction. During the closing process, the first hook 11 can abut against the first driving arm 31, so that the elastic member 34 is switched from the second driving state to the first driving state.

Specifically, in the door opening state, under the action of the elastic member 34, the first lever 30 can be kept at a desired position, so that on one hand, the first lever 30 is prevented from rotating along the first direction to trigger the monitoring switch 201 by mistake under the condition that the first door hook 11 is not acted on, and on the other hand, smooth movement between the first driving arm 31 and the second driving arm 32 during the door closing process of the first door hook 11 can be ensured, and the first lever 30 is prevented from rotating to influence the cooperation of the first door hook 11 and the first lever 30. And the first door hook 11 and the first driving arm 31 are propped against each other to drive the first lever 30 to rotate along the first direction, so that the elastic piece 34 can timely switch the driving state along with the rotation of the first lever 30, and the elastic piece 34 can timely drive the door closing.

In the door closing state, the elastic member 34 is in the first driving state, so that the first lever 30 can be abutted against the first door hook 11 through the second driving arm 32, and the door body 200 is ensured to be kept in the door closing state. When the door needs to be opened, the user controls the first door hook 11 to move along the opening direction and to abut against the second driving arm 32, so that the first lever 30 rotates along the second direction. When the first lever 30 rotates to a certain angle, the elastic member 34 is switched from the first driving state to the second driving state, so that the elastic member 34 can drive the first lever 30 to rotate along the second direction, and the resistance to the first door hook 11 is timely relieved, so that the door body 200 can be easily opened.

In some embodiments of the present invention, as shown in fig. 9 and 14-16, the length of the second driving arm 32 may be smaller than the length of the first driving arm 31, so that the first door hook 11 is easier to move between the first driving arm 31 and the second driving arm 32 during the door closing process, and interference caused by the second driving arm 32 to the movement of the first door hook 11 is avoided.

In some embodiments of the present invention, as shown in fig. 9 and 14-16, the thickness of the second driving arm 32 is smaller than the thickness of the first driving arm 31 in the axial direction of the first lever 30, and the thickness difference makes the gap between the second driving arm 32 and the interlocking bracket 20 larger than the gap between the first driving arm 31 and the interlocking bracket 20. In the door closing process, even if the second driving arm 32 causes certain interference to the movement of the first door hook 11 along the door closing direction, the first door hook 11 is easy to move between the first driving arm 31 and the second driving arm 32 through the second driving arm 32 or the deformation of the first door hook 11, and the first door hook 11 and the first driving arm 31 are not easy to deform, so that the first door hook 11 moves to one side of the first driving arm 31 plate far away from the second driving arm 32, and the stability of the cooperation of the first door hook 11 and the first lever 30 is ensured.

In addition, in some embodiments, as shown in fig. 15 and 16, a thinned area 39 is provided on one side surface of the second driving arm 32 in the axial direction of the first lever 30, so that when the first lever 30 is mounted on the interlocking bracket 20, a certain gap can be formed between the second driving arm 32 and the interlocking bracket 20 where the thinned area 39 is provided. When the first lever 30 is touched by mistake and rotates to a position triggering the monitoring switch 201 along the first direction, the first door hook 11 can be forced to pass through the gap by closing the door and move between the first driving arm 31 and the second driving arm 32, and then the first door hook 11 can drive the first lever 30 to rotate and reset along the second direction by opening the door.

For example, as shown in fig. 15 and 16, the interlocking bracket 20 includes a bracket body 22 and a cover 23, the first lever 30 is mounted between the bracket body 22 and the cover 23, and the thinned area 39 may be a notch groove provided on a side of the second driving arm 32 facing the bracket body 22, so that the gap is formed between the second driving arm 32 and the bracket body 22.

In addition, the thickness of the first door hook 11 may decrease in the door closing direction, so that the thickness of the rear end of the first door hook 11 is smaller and the thickness of the front end is larger as shown in fig. 1. In the state that the first lever 30 mistakenly triggers the monitoring switch 201, the front thick and rear thin structure of the first door hook 11 makes the first door hook 11 easier to move from the thinning area 39 to the position between the first driving arm 31 and the second driving arm 32, so that the problem of abnormal triggering is solved more easily.

According to some embodiments of the present invention, as shown in fig. 3 and 8, the interlocking bracket 20 may be provided with a stopper 21. In the door-closed state, the limiting portion 21 can abut against the first lever 30 to prevent the first lever 30 from rotating in the first direction. In other words, the limiting portion 21 can limit the limit position of the first lever 30 rotating along the first direction, so as to avoid damage to the monitor switch 201 or the first door hook 11 caused by an excessive rotation angle of the first lever 30.

For example, in the embodiment including the elastic member 34, the elastic member 34 drives the first lever 30 to rotate along the first direction, so as to drive the first door hook 11 to move along the door closing direction, thereby realizing an automatic door closing action; when the first lever 30 rotates to the position where the first lever 30 abuts against the limiting portion 21, the limiting effect of the limiting portion 21 makes the first lever 30 be stressed and balanced, and the first lever 30 does not continue to rotate under the driving of the elastic member 34, and can be kept at a position where the first lever 30 is stably matched with the first door hook 11, so that the door body 200 is kept in a door-closed state.

According to some embodiments of the present invention, as shown in fig. 3 and 8, the interlock 100 may further include a cushioned door closing assembly 50. The damper door closing assembly 50 connects the interlock bracket 20 and the first lever 30, for example, with the first driving arm 31 of the first lever 30.

During the door closing process, the door buffering assembly 50 is configured to apply a buffering force opposite to the first direction to the first lever 30, so as to achieve a door closing buffering effect, avoid a severe collision between the door body 200 and the machine body during the door closing process, and also facilitate reducing door closing noise.

The specific structure of the door buffering and closing assembly 50 is not particularly limited, and the door buffering and closing assembly is only required to play a role in buffering and closing. For example, the damper door closing assembly 50 may include a damper, a spring plate, a compression spring, or the like.

For example, in some embodiments, as shown in fig. 3-4 and 8-9, the damper door closing assembly 50 includes a damper 51 and a connector 52. Wherein, one end of the buffer member 51 is rotatably connected with the interlocking bracket 20, the connecting member 52 is rotatably connected with the other end of the buffer member 51 and the first driving arm 31 respectively, so that the buffer member 51 can play a role in buffering in the rotation process of the first lever 30, and the rotatable connecting structure can adapt to the rotation of the first lever 30, thereby avoiding the occurrence of jamming.

In addition, with continued reference to fig. 3-4 and fig. 8-9, the first driving arm 31 has a driving surface 36, the connecting member 52 is rotatably mounted on the first driving arm 31, and in the door-open state, the connecting member 52 forms a predetermined angle with the driving surface 36 as shown in fig. 4, and the other end of the buffer member 51 is rotatably connected with the connecting member 52. During the door closing process, after the first lever 30 rotates in the first direction by a preset angle, the driving surface 36 can abut against the connecting piece 52 to drive the connecting piece 52 to rotate.

Since the connecting piece 52 and the driving surface 36 are disposed at a predetermined angle in the door-opening state, when the first door hook 11 just contacts the first lever 30 and drives the first lever 30 to rotate along the first direction, the buffer piece 51 will not apply a buffer force to the first lever 30, so that it is easier for the first door hook 11 to drive the first lever 30 to rotate.

In some embodiments, as shown in fig. 3-4 and 8-9, a groove 37 is provided on a side of the first driving arm 31 facing the door closing buffer assembly 50, a bottom wall surface of the groove 37 is formed as a driving surface 36, one side surface of the groove 37 is connected with a hole shaft of the connecting piece 52, and a hook 38 spaced a certain distance from the driving surface 36 is provided on the other side surface of the groove 37. The buffer member 51 is a damper, and the damper is connected with the hole shaft of the connecting member 52 through the notch of the groove 37. The interlock device 100 further includes a resilient member 34 coupled to the first lever 30.

In the door opening state, the elastic member 34 applies a driving force to the first lever 30 to rotate in the second direction, so that the first door hook 11 can smoothly move to abut against the first driving arm 31, and at this time, the connecting member 52 forms a preset angle with the driving surface 36, so that the damper does not generate a buffering force. In the door closing process, the first door hook 11 contacts with the first driving arm 31 and drives the first lever 30 to rotate along the first direction, and the damper has no buffer force, so that the first door hook 11 only needs to overcome the driving force of the elastic piece 34 to drive the first lever 30, and the resistance is smaller; when the connecting piece 52 is rotated to abut against the driving surface 36, the elastic piece 34 switches states to apply a driving force to the first lever 30 to rotate along the first direction, so as to actively drive the first lever 30 to rotate, the first door hook 11 to move and the door body 200 to close, and at this time, the damper generates a buffering force to reduce the door closing noise. In the door opening process, the first door hook 11 pulls the first lever 30 to rotate along the second direction, the connecting piece 52 rotates relative to the first driving arm 31, a certain included angle is formed between the connecting piece 52 and the driving surface 36, and the hook abuts against the connecting piece 52, so that the included angle is prevented from being too large, the connecting piece 52 is prevented from being separated from the groove 37, and the connecting piece 52 and the first lever 30 are ensured to be stably connected.

For example, in other embodiments, the door closing buffer assembly 50 may include a buffer member 51, where the buffer member 51 is a spring or a compression spring, and the door closing buffer assembly 50 is formed as a buffer energy storage assembly. Specifically, one end of the elastic piece is connected to the interlocking bracket 20, the first lever 30 abuts against the other end of the elastic piece, and the elastic piece can be elastically deformed to store energy.

In the door closing process, the first lever 30 rotates along the first direction and presses the other end of the elastic sheet, so that the bending degree of the elastic sheet is increased, energy is accumulated, and a buffering effect and an energy storage effect are achieved; in the door opening process, the spring plate can release stored energy to apply a driving force rotating along the second direction to the first lever 30, so that the first lever 30 can push the first door hook 11 and the door body 200 to move towards the door opening direction, and the door opening assisting function is achieved. In the door-closed state, the direction of the driving force acting on the first lever 30 by the elastic piece is directed to the rotation center or the vicinity of the rotation center of the first lever 30, and at this time, the elastic piece does not provide a component force in the rotation direction of the first lever 30 or only provides a small component force, so that the door body 200 can be tightly closed.

The second lever 40 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in fig. 17 to 18, the second lever 40 includes: the first, second and third rotating arms 41, 42 and 43 are sequentially arranged in the second direction (clockwise direction as shown in fig. 3). As shown in fig. 1 to 10, in the door closing process, the first door hook 11 can abut against the first rotating arm 41 to drive the second lever 40 to rotate along the second direction, so as to drive the second rotating arm 42 and the third rotating arm 43 to rotate along the second direction, the second rotating arm 42 can trigger the first micro switch 202, and the third rotating arm 43 can trigger the second micro switch 203, so that one lever can drive the two micro switches to open in sequence.

In some embodiments, as shown in fig. 17 to 18, at least two of the first rotating arm 41, the second rotating arm 42 and the third rotating arm 43 are staggered along the axial direction of the second lever 40, so that the first rotating arm 41, the second rotating arm 42 and the third rotating arm 43 have smaller included angles along the second direction and are not easy to generate position interference, which is beneficial to making the structure of the interlocking device 100 in the moving direction of the first door hook 11 more compact.

For example, as shown in fig. 17 and 18, in the axial direction of the second lever 40, the first rotating arm 41 and the third rotating arm 43 are located at the same position, the second rotating arm 42 is staggered from the other two rotating arms, so that the three rotating arms are distributed in two layers in the axial direction, the corresponding first micro switch 202 and the second micro switch 203 can be arranged in two layers along the axial direction of the second lever 40, and the first door hook 11 can drive the second lever 40 from the side of the first rotating arm 41 facing away from the third rotating arm 43, thereby avoiding the interference of the first door hook 11, the first micro switch 202 and the second micro switch 203.

In some embodiments, the second rotating arm 42 may be provided with a second driving portion 44, so that the second rotating arm 42 and the first micro switch 202 can be at least partially staggered in the axial direction, so as to meet the space arrangement requirement.

According to some embodiments of the present invention, as shown in fig. 11-13, the interlocking bracket 20 may include a bracket body 22 and a cover 23, where the cover 23 covers the bracket body 22, so that the cover 23 cooperates with the bracket body 22 to define an installation space 204, and the first lever 30 and the second lever 40 are installed in the installation space 204 to limit the first lever 30 and the second lever 40, so as to ensure that the two levers can rotate stably and are not easily interfered or touched by other structures to affect normal operation.

As shown in fig. 6 to 10, the first door hook 11 may extend into the installation space 204 to contact with the first lever 30 and the second lever 40 in the door closing process, where the installation space 204 may also shield the cooperation structure of the first door hook 11 and the lever, so as to ensure smooth driving, and may also play a guiding role on the first door hook 11, so as to ensure that the first door hook 11 can accurately contact with the first lever 30 and the second lever 40.

In some embodiments, as shown in fig. 12 and 13, the bracket body 22 may be provided with a first mounting post 222 and a second mounting post 223, the first lever 30 is sleeved on the first mounting post 222, and the second lever 40 is sleeved on the second mounting post 223. And, the ends of the first mounting column 222 and the second mounting column 223 are inserted into the cover 23, so as to limit the bracket body 22 and the cover 23 by being matched with the cover 23, and avoid the influence of dislocation or deformation of the cover 23 and the bracket body 22 on the trigger switch.

Furthermore, in some embodiments, as shown in fig. 1-5 and 11-13, the monitor switch 201 is disposed on a side of the cover 23 facing away from the bracket body 22, the cover 23 is provided with a first through hole 231, the first lever 30 is provided with a first driving portion 33, and the first driving portion 33 can pass through the first through hole 231 to protrude to a side of the cover 23 facing away from the bracket body 22. During the rotation of the first lever 30, the first driving part 33 rotates in the first through hole 231, so as to trigger the monitor switch 201. The monitoring switch 201 may be disposed outside the installation space 204 to avoid position interference with components in the installation space 204, such as avoiding interference with the damper door closing assembly 50, and more reasonable position arrangement.

With continued reference to fig. 1-5 and fig. 11-13, the first micro-switch 202 is disposed on a side of the cover 23 facing away from the bracket body 22, and the second micro-switch 203 is disposed in the installation space 204. The cover 23 may further have a second through hole 232, and the second lever 40 is provided with a second driving portion 44, and the second driving portion 44 may pass through the second through hole 232 to extend to a side of the cover 23 facing away from the bracket body 22. During the rotation of the second lever 40, the second driving portion 44 rotates within the second through hole 232, so as to trigger the first micro switch 202 located outside the installation space 204. And the portion of the second lever 40 located in the installation space 204 may trigger the second micro switch 203 located in the installation space 204. The first micro switch 202 and the second micro switch 203 are located on different sides of the cover 23 so that they do not interfere. For example, the projections of the first micro-switch 202 and the second micro-switch 203 along the axial direction of the second lever 40 may be at least partially overlapped, so that the arrangement of the two micro-switches is more compact, and the second lever 40 is faster to trigger the two micro-switches in turn.

The following detailed description of the microwave oven 1000 in accordance with one embodiment of the present invention refers to the accompanying drawings, it being understood that the following description is illustrative only and is not to be construed as limiting the invention.

As shown in fig. 1 to 18, a microwave oven 1000 according to an embodiment of the present invention includes a door body 200, a body, and an interlock device 100. The interlock device 100 includes a first door hook 11, a second door hook 12, an interlock bracket 20, a first lever 30, a second lever 40, a monitor switch 201, a first micro switch 202, a second micro switch 203, an elastic member 34, a buffer door closing assembly 50, a driving member 53, and an inclined block 54.

The door body 200 is rotatably mounted on the machine body around a vertical axis, the first door hook 11 and the second door hook 12 are fixedly arranged on the door body 200, and the second door hook 12 is located above the first door hook 11. The interlocking bracket 20 is mounted to the machine body and includes a bracket body 22 and a cover 23 to define a mounting space 204. The first lever 30 and the second lever 40 are rotatably installed in the installation space 204, the first lever 30 includes a first driving arm 31, a second driving arm 32, and a first driving part 33, and the first driving part 33 passes through the first through hole 231 of the cover 23; the second lever 40 includes a first rotating arm 41, a second rotating arm 42, a third rotating arm 43, and a second driving portion 44, and the second driving portion 44 passes through the second through hole 232 of the cover 23. The second micro-switch 203 is disposed in the installation space 204, and the monitoring switch 201 and the first micro-switch 202 are disposed on a side of the cover 23 facing away from the bracket body 22. The bracket body 22 is provided with a third through hole 221, the elastic piece 34 is arranged on one side of the bracket body 22 facing away from the cover 23, and the connecting part 35 of the first lever 30 passes through the third through hole 221 to be connected with the elastic piece 34.

In addition, the inclined block 54 is vertically movably mounted to the bracket body 22, and both ends of the driving member 53 respectively abut against the inclined block 54 and the bracket body 22 to apply an upward driving force to the inclined block 54.

As shown in fig. 1 to 5, in the door-open state, the first door hook 11 and the second door hook 12 are separated from the body. The driving member 53 drives the bevel block 54 to be positioned at a high position. The first lever 30 rotates clockwise to an extreme position against the edge of the bracket body 22 under the tensile force of the elastic piece 34 and is disengaged from the monitoring switch 201; the second lever 40 is in a position separated from the first micro switch 202 and the second micro switch 203.

During the door closing process, the door body 200 is pushed to move the first door hook 11 and the second door hook 12 in the door closing direction, i.e., backward. The rear end of the first door hook 11 extends between the first driving arm 31 and the second driving arm 32 and abuts against the first driving arm 31 to push the first lever 30 to rotate in the anticlockwise direction; when the first lever 30 rotates by a preset angle, the pulling direction of the elastic member 34 is switched to drive the first lever 30 to rotate in the anticlockwise direction, so that the second driving arm 32 of the first lever 30 automatically pulls the first door hook 11 to move backwards, the connecting member 52 contacts with the driving surface 36, the driving surface 36 drives the connecting member 52 to move, and the buffer member 51 plays a role in buffering; the first lever 30 rotates to cause the first driving portion 33 to trigger the monitor switch 201; when the first door hook 11 moves to contact with the second lever 40, the second lever 40 is driven to rotate in a clockwise direction, and the second driving part 44 and the third rotating arm 43 of the second lever 40 trigger the first micro switch 202 and the second micro switch 203 in sequence. In the door closing process, the second door hook 12 abuts against the inclined block 54, the inclined block 54 compresses the driving piece 53 to enable the hook portion of the second door hook 12 to move to the rear side of the inclined block 54, and limiting of the inclined block 54 on the second door hook 12 is achieved to keep the door body 200 closed.

As shown in fig. 6 to 10, when the first lever 30 rotates to abut against the stopper 21, the rotation is stopped, and the second lever 40 triggers the second micro switch 203 to stop the rotation. At this time, under the tensile force of the elastic member 34, the second driving arm 32 of the first lever 30 stops the first door hook 11, so that the door body 200 is kept in the door-closed state, and the first lever 30 and the second lever 40 are kept in the positions where the monitoring switch 201, the first micro switch 202 and the second micro switch 203 are turned on.

During the door opening process, the door body 200 is reversely rotated to be opened, so that the first door hook 11 is moved forward. In the moving process, firstly, the stopping force of the second lever 40 is withdrawn, and the second lever 40 rotates anticlockwise under the action of the rebound force of the first micro switch 202 and the second micro switch 203 so as to release the triggering of the first micro switch 202 and the second micro switch 203; the first door hook 11 is also propped against the second driving arm 32 in the moving process, so as to drive the first lever 30 to overcome the elastic force of the elastic piece 34 and rotate clockwise, and the first driving part 33 releases the triggering of the monitoring switch 201; when the pulling direction of the elastic member 34 is switched to drive the first lever 30 to rotate clockwise, the first lever 30 automatically resets to a position against the edge of the bracket body 22 and stays at the position under the driving of the elastic member 34, and the first lever 30 can drive the first door hook 11 to move forward so as to spring the door body 200. In the door opening process, the second door hook 12 is propped against the inclined block 54 again, the inclined block 54 compresses the driving piece 53 to enable the hook portion of the second door hook 12 to move to the front side of the inclined block 54, and the inclined block 54 contacts with the limit of the inclined block 54 on the second door hook 12, so that the door body 200 can be opened.

In summary, through first door collude 11 and two lever cooperation, trigger three switch piece respectively, the switch piece does not directly take place the direct contact with first door collude 11, and three switch piece can be according to monitor switch 201, first micro-gap switch 202, the orderly triggering of order of second micro-gap switch 203, has guaranteed the security of equipment.

Other constructions and operations of the microwave oven 1000 according to the embodiment of the present invention are known to those skilled in the art, and will not be described in detail herein.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description herein, reference to the terms "embodiment," "specific embodiment," "example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An interlock device for a microwave oven, comprising:

a first door hook;

the interlocking bracket is provided with a monitoring switch, a first micro switch and a second micro switch;

a first lever and a second lever rotatably mounted to the interlocking bracket, respectively, wherein,

the first door hook sequentially drives the first lever and the second lever to rotate in the door closing process of the microwave oven, so that after the first lever triggers the monitoring switch, the second lever sequentially triggers the first micro switch and the second micro switch.

2. The interlock of claim 1, wherein the rotation shaft of the first lever is disposed at a side of the rotation shaft of the second lever adjacent to the first door hook.

3. The interlock apparatus of claim 1, wherein the rotation shaft of the first lever and the rotation shaft of the second lever are respectively located at both sides of the first door hook perpendicular to the closing direction.

4. The interlock of a microwave oven as claimed in claim 1, wherein the first lever comprises:

a first driving arm provided with a first driving part for triggering the monitoring switch,

in the door closing process, the first door hook abuts against the first driving arm to drive the first lever to rotate along a first direction.

5. The interlock of a microwave oven as claimed in claim 4, wherein the first lever further comprises:

the second driving arm is positioned at one side of the first driving arm close to the first door hook,

in the process of closing the door, the first door hook extends between the first driving arm and the second driving arm,

in the door opening process, the first door hook abuts against the second driving arm to drive the first lever to rotate along a second direction, and the second direction is opposite to the first direction.

6. The interlock for a microwave oven as claimed in claim 5, further comprising:

the elastic piece is connected with the interlocking support and the first lever and is provided with a first driving state, and in the first driving state, the elastic piece applies driving force rotating along the first direction to the first lever so that the second driving arm drives the first door hook to move along the door closing direction.

7. The interlock apparatus of claim 6, wherein said elastic member further has a second driving state in which said elastic member applies a driving force to said first lever to rotate in said second direction,

in the door closing process, the first door hook is suitable for being abutted against the first driving arm so that the elastic piece is switched from the second driving state to the first driving state.

8. The interlocking device of a microwave oven as claimed in claim 5, wherein,

the length of the second driving arm is smaller than that of the first driving arm; and/or the number of the groups of groups,

the thickness of the second driving arm is smaller than that of the first driving arm in the axial direction of the first lever.

9. The interlock device of claim 4, wherein the interlock bracket is provided with a limit portion that abuts against the first lever in a door-closed state to prevent the first lever from rotating in the first direction.

10. The interlock for a microwave oven as claimed in claim 4, further comprising:

and the buffer door closing assembly is connected with the interlocking bracket and the first driving arm, and is used for applying buffer force opposite to the first direction to the first lever in the door closing process.

11. The interlock of a microwave oven as claimed in claim 10, wherein the damper door closing assembly comprises:

one end of the buffer piece is rotatably connected with the interlocking bracket;

the first driving arm is provided with a driving surface, the connecting piece is rotatably arranged on the first driving arm and forms a preset angle with the driving surface, the other end of the buffer piece is rotatably connected with the connecting piece,

in the door closing process, after the first lever rotates along the first direction by the preset angle, the driving surface abuts against the connecting piece to drive the connecting piece to rotate.

12. The interlock of a microwave oven as claimed in claim 1, wherein the second lever comprises:

the first door hook is suitable for being propped against the first rotating arm to drive the second lever to rotate along a second direction in the door closing process;

the first rotating arm, the second rotating arm and the third rotating arm are sequentially arranged along the second direction, and the second rotating arm and the third rotating arm are respectively used for triggering the first micro switch and the second micro switch.

13. The interlocking device of a microwave oven as claimed in claim 12, wherein,

at least two of the first, second and third rotating arms are staggered in an axial direction of the second lever.

14. The interlock device of any one of claims 1 to 13, wherein the interlock bracket includes a bracket body and a cover body, the cover body and the bracket body defining an installation space, the first lever and the second lever being installed in the installation space,

the monitoring switch is arranged on one side of the cover body, which is opposite to the bracket body, the first lever is provided with a first driving part for triggering the monitoring switch, and the cover body is provided with a first through hole for allowing the first driving part to pass through;

one of the first micro-switch and the second micro-switch is arranged in the installation space, the other one of the first micro-switch and the second micro-switch is arranged on one side, opposite to the bracket body, of the cover body, a second driving part for triggering the first micro-switch is arranged on the second lever, and the cover body is provided with a second through hole for enabling the second driving part to pass through.

15. A microwave oven, comprising:

The door body is arranged on the machine body;

the interlock device of a microwave oven according to any one of claims 1 to 14, wherein the first door hook is installed to the door body, and the interlock bracket is installed to the body.