Interlocking assembly and microwave oven thereof

Abstract

The interlocking assembly comprises an interlocking support, an interlocking lever and a microswitch assembly, the microswitch assembly is arranged on the interlocking support, the interlocking lever is rotatably connected to the interlocking support, the interlocking lever is provided with a rotating arm, and in a natural state, the rotating arm is connected with the microswitch assembly. The rotating arm is vertically arranged downwards, and when the rotating arm is pushed and pressed by external force, the rotating arm rotates in a first direction and extrudes and triggers the microswitch assembly; and when the external force is lost, the rotating arm rotates in a second direction to be separated from the microswitch assembly under the action of the gravity of the rotating arm, and the first direction is opposite to the second direction. The reset rotation of the interlocking lever is driven by the gravity of the interlocking lever, an elastic reset piece is not needed, parts of the interlocking assembly are reduced, the structure of the interlocking assembly is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave ovens, in particular to an interlock assembly and a microwave oven thereof. Background Art

[0002] The main functions of a microwave oven are to heat, cook and thaw food. In addition to cooking food and thawing food, etc., it is loved by consumers. However, when a microwave oven is in use, there are also great dangers. The microwave generated by the microwave oven, if misused, will cause great harm to the human body. There are often some users who are eager to open the microwave oven to take out the food inside before the microwave stops working, and even some users open the microwave oven door to add food while the microwave oven is working. Such an operation is very dangerous and will cause great harm to the human body.

[0003] In order to ensure microwave safety, an interlock assembly is provided on the oven door assembly of the microwave oven to ensure that the magnetron can be started only after the oven door assembly is closed in place. However, the existing interlock assembly usually includes a micro switch, a lever, an elastic reset member, etc. There are many components and the structure is complex, resulting in a high production cost of the microwave oven. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an interlock assembly and a microwave oven thereof, so as to solve the technical problem that the existing interlock assembly of the microwave oven has many components and a complex structure, resulting in a high production cost of the microwave oven.

[0005] The utility model provides an interlock assembly, including an interlock bracket, an interlock lever and a micro switch assembly. The micro switch assembly is arranged on the interlock bracket. The interlock lever is rotatably connected to the interlock bracket. The interlock lever has a rotating arm. In the natural state, the rotating arm is vertically downward. When an external force pushes the rotating arm, the rotating arm rotates in a first direction and squeezes to trigger the micro switch assembly. When the external force is removed, the rotating arm rotates in a second direction under the action of its own gravity and disengages from the micro switch assembly. The first direction is opposite to the second direction.

[0006] For the interlock assembly as described above, a rotating shaft is provided on the interlock bracket, a rotating ring is provided on the interlock lever, the rotating ring is rotatably sleeved on the rotating shaft, and the rotating arm is connected to the outer peripheral wall of the rotating ring.

[0007] For the interlock assembly as described above, a buckle is provided on the interlock bracket. A clamping position is formed between the outer peripheral wall of the rotating shaft and the buckle. A limiting block is provided on the outer peripheral wall of the rotating ring. The rotating ring is inserted into the clamping position, and the limiting block is clamped with the buckle to limit the movement of the interlock lever along the axis direction of the rotating shaft.

[0008] The interlock assembly as described above, wherein the microswitch assembly includes a first microswitch and a second microswitch. The first microswitch has a first switch contact, and the second microswitch has a second switch contact. Both the first switch contact and the second switch contact face the interlock lever. When an external force presses the rotating arm, the rotating arm rotates in a first direction and sequentially presses the first switch contact and the second switch contact.

[0009] The interlock assembly as described above, wherein the rotating arm has a first contact wall surface and a second contact wall surface. The first contact wall surface is used to press the first switch contact, and the second contact wall surface is used to press the second switch contact. The first contact wall surface is an arc-shaped structure, and the central axis of the first contact wall surface coincides with the rotation central axis of the interlock lever.

[0010] The interlock assembly as described above, wherein a guiding rib for driving the door hook of the microwave oven to rotate is provided on the interlock bracket, and the guiding rib is inclined upward toward the rotating arm.

[0011] The interlock assembly as described above, further comprising a third microswitch. The third microswitch is disposed on the interlock bracket, and a third microswitch contact for being reset and pressed by the door hook of the microwave oven after passing through the guiding rib is provided on the third microswitch.

[0012] The present utility model further provides a microwave oven, including the interlock assembly as described above.

[0013] The microwave oven as described above, wherein the microwave oven includes a furnace door, a tension spring, and a door hook rotatably disposed on the furnace door. One end of the tension spring is connected to the door hook, and the other end is connected to the furnace door.

[0014] The microwave oven as described above, wherein the door hook includes a door hook body and a driving block extending downward along the bottom wall of the door hook body. The door hook body is rotatably connected to the furnace door, the tension spring is connected to the door hook body, and the driving block is used to drive the rotating arm to rotate and to trigger the third microswitch of the interlock assembly.

[0015] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0016] In the present utility model, the interlock assembly includes an interlock bracket, an interlock lever, and a microswitch assembly. The microswitch assembly is disposed on the interlock bracket, and the interlock lever is rotatably connected to the interlock bracket. The interlock lever has a rotating arm. In the natural state, the rotating arm is vertically downward. When an external force presses the rotating arm, the rotating arm rotates in a first direction and squeezes to trigger the microswitch assembly; when the external force is removed, the rotating arm rotates in a second direction under the action of its own gravity to disengage from the microswitch assembly. The first direction and the second direction are opposite to each other. Among them, the first direction is the counterclockwise direction, and the second direction is the clockwise direction. When an external force presses the rotating arm, the rotating arm rotates counterclockwise upward and squeezes to trigger the microswitch assembly; when the external force is removed, the rotating arm rotates clockwise downward under the action of its own gravity to disengage from the microswitch assembly. The reset rotation of the interlock lever of the present utility model is driven by its own gravity, and there is no need to provide an elastic reset member, which reduces the components of the interlock assembly, thereby simplifying the structure of the interlock assembly and being beneficial to reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of an interlock assembly shown according to an exemplary embodiment;

[0019] Figure 2 is an exploded view of an interlock assembly shown according to an exemplary embodiment;

[0020] Figure 3 is a schematic structural diagram of an interlock lever shown according to an exemplary embodiment;

[0021] Figure 4 is a schematic structural diagram of a microwave oven when the oven door is opened shown according to an exemplary embodiment;

[0022] Figure 5 is a schematic structural diagram of a microwave oven during the closing process of the oven door shown according to an exemplary embodiment;

[0023] Figure 6 is a schematic structural diagram of a microwave oven when the oven door is closed shown according to an exemplary embodiment;

[0024] Figure 7 is an exploded view of the oven door, the tension spring, and the door hook shown according to an exemplary embodiment.

[0025] Wherein: 1. Interlocking bracket; 11. Rotating shaft; 12. Buckle; 13. Guide rib; 2. Interlocking lever; 21. Swivel ring; 211. Limit block; 22. Rotating arm; 221. First contact wall surface; 222. Second contact wall surface; 3. First microswitch; 31. First switch contact; 4. Second microswitch; 41. Second switch contact; 5. Third microswitch; 51. Third microswitch contact; 6. Furnace door; 7. Door hook; 71. Door hook body; 72. Driving block; 8. Tension spring. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model.

[0031] Referring to Figures 1-3 , this utility model provides an interlock assembly, including an interlock bracket 1, an interlock lever 2, and a microswitch assembly. The microswitch assembly is disposed on the interlock bracket 1, and the interlock lever 2 is rotatably connected to the interlock bracket 1. The interlock lever 2 has a rotating arm 22. In the natural state, the rotating arm 22 is vertically downward. When an external force presses the rotating arm 22, the rotating arm 22 rotates in a first direction and presses to trigger the microswitch assembly; when the external force is removed, the rotating arm 22 rotates in a second direction under the action of its own gravity to disengage from the microswitch assembly, and the first direction is opposite to the second direction. In a specific embodiment, the first direction is counterclockwise and the second direction is clockwise. The center of gravity of the interlock lever 2 is located on the rotating arm 22. In the natural state, the center of gravity of the interlock lever 2 is below the rotation center between it and the interlock bracket 1. When an external force presses the rotating arm 22, the rotating arm 22 rotates counterclockwise upward and presses to trigger the microswitch assembly; when the external force is removed, the rotating arm 22 rotates clockwise downward under the action of its own gravity to disengage from the microswitch assembly. The reset rotation of the interlock lever 2 of this utility model is driven by its own gravity, eliminating the need to set an elastic reset member, reducing the components of the interlock assembly, thus simplifying the structure of the interlock assembly and facilitating the reduction of production costs.

[0032] Further, a rotating shaft 11 is provided on the interlock bracket 1, a rotating ring 21 is provided on the interlock lever 2, and the rotating ring 21 is rotatably sleeved on the rotating shaft 11. The rotating arm 22 is connected to the outer peripheral wall of the rotating ring 21. The rotating arm 22 and the rotating ring 21 are of an integral structure, which can be integrally injection-molded. The rotating arm 22 is of a hollow structure, reducing the weight of the rotating arm 22, facilitating the reduction of processing difficulty, and also avoiding the situation that the rotating arm 22 is too heavy to be pushed by the oven door 6 of the microwave oven, affecting the operation of the interlock assembly.

[0033] Further, a buckle 12 is provided on the interlock bracket 1. A clamping position is formed between the outer peripheral wall of the rotating shaft 11 and the buckle 12. A limiting block 211 is provided on the outer peripheral wall of the rotating ring 21. The rotating ring 21 is inserted into the clamping position, and the limiting block 211 is engaged with the buckle 12 to limit the movement of the interlock lever 2 along the axis direction of the rotating shaft 11, preventing the interlock lever 2 from disengaging from the interlock bracket 1.

[0034] Further, the microswitch assembly includes a first microswitch 3 and a second microswitch 4. The first microswitch 3 has a first switch contact 31, and the second microswitch 4 has a second switch contact 41. Both the first switch contact 31 and the second switch contact 41 face the interlock lever 2. When an external force presses the rotating arm 22, the rotating arm 22 rotates in a first direction and sequentially presses the first switch contact 31 and the second switch contact 41.

[0035] Further, the rotating arm 22 has a first contact wall surface 221 and a second contact wall surface 222. The first contact wall surface 221 is used to press the first switch contact 31, and the second contact wall surface 222 is used to press the second switch contact 41. The first contact wall surface 221 is an arc structure, and the central axis of the first contact wall surface 221 coincides with the rotation central axis of the interlock lever 2. After the first contact wall surface 221 presses the first switch contact 31, the rotating arm 22 needs to continue to rotate until the second contact wall surface 222 presses the second switch contact 41. Designing the central axis of the first contact wall surface 221 to coincide with the rotation central axis of the interlock lever 2 enables the first contact wall surface 221 to always press the first switch contact 31 during the continuous rotation of the rotating arm 22, achieving sequential triggering of the first microswitch 3 and the second microswitch 4, and finally both the first microswitch 3 and the second microswitch 4 are in a triggered state.

[0036] Further, the interlock bracket 1 is provided with a guiding rib 13 for driving the door hook of the microwave oven to rotate. The guiding rib 13 is inclined upward towards the rotating arm 22. The guiding rib 13 is used to drive the door hook of the microwave oven to rotate and can also clamp the door hook of the microwave oven after the oven door is closed, preventing the oven door from accidentally opening.

[0037] Further, the interlock assembly further includes a third microswitch 5. The third microswitch 5 is arranged on the interlock bracket 1, and the third microswitch 5 is provided with a third microswitch contact 51 for the door hook of the microwave oven to reset and press after passing through the guiding rib 13. When the oven door of the microwave oven is closed, the door hook of the microwave oven abuts against the guiding rib 13, and the door hook of the microwave oven rotates relative to the oven door. When the oven door of the microwave oven is completely closed, the door hook of the microwave oven rotates in the reverse direction to reset, the door hook of the microwave oven rotates downward to press the third microswitch contact 51, and the door hook of the microwave oven is clamped at the bottom of the guiding rib 13.

[0038] See Figures 4-7, the present utility model further provides a microwave oven, including an interlock assembly. The interlock assembly includes an interlock bracket 1, an interlock lever 2, and a microswitch assembly. The microswitch assembly is disposed on the interlock bracket 1, and the interlock lever 2 is rotatably connected to the interlock bracket 1. The interlock lever 2 has a rotating arm 22. In the natural state, the rotating arm 22 is vertically downward. When the oven door 6 of the microwave oven is closed, when the oven door 6 of the microwave oven presses the rotating arm 22, the rotating arm 22 rotates in a first direction and presses the switch contact of the microswitch assembly; when the oven door 6 of the microwave oven is opened, the rotating arm 22 loses the pushing force of the oven door 6 of the microwave oven, and the rotating arm 22 rotates in a second direction under the action of its own gravity to disengage from the switch contact of the microswitch assembly. The first direction and the second direction are opposite to each other.

[0039] Further, the microwave oven includes an oven door 6, a tension spring 8, and a door hook 7 rotatably disposed on the oven door 6. One end of the tension spring 8 is connected to the door hook 7, and the other end is connected to the oven door 6.

[0040] Further, the door hook 7 includes a door hook body 71 and a driving block 72 extending downward along the bottom wall of the door hook body 71. The door hook body 71 is rotatably connected to the oven door 6. The tension spring 8 is connected to the door hook body 71. The driving block 72 is used to drive the rotating arm 22 to rotate and to trigger a third microswitch of the interlock assembly.

[0041] When the oven door 6 is closed, the door hook 7 abuts against the guiding rib 13 of the interlock bracket 1. The door hook 7 rotates relative to the oven door 6. At the same time, the driving block 72 abuts against the rotating arm 22, so that the interlock lever 2 rotates relative to the interlock bracket 1 and drives the rotating arm 22 to rotate. During the rotation of the rotating arm 22, the first contact wall surface 221 and the second contact wall surface 222 sequentially abut against the first switch contact 31 and the second switch contact 41. When the oven door 6 is completely closed, the driving block 72 passes through the guiding rib 13 of the interlock bracket 1. Under the action of the tension spring 8, the door hook 7 rotates reversely to reset. The driving block 72 rotates downward to press the third microswitch contact 51 on the third microswitch 5. The first switch contact 31, the second switch contact 41, and the third microswitch contact 51 are sequentially triggered to determine that the oven door 6 is closed, and the microwave oven is normally powered on and operates.

[0042] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model.

Claims

1. An interlocking assembly, characterized in that: The invention comprises an interlocking bracket (1), an interlocking lever (2) and a micro switch assembly, wherein the micro switch assembly is arranged on the interlocking bracket (1), the interlocking lever (2) is rotatably connected to the interlocking bracket (1), and the interlocking lever (2) has a rotating arm (22). In a natural state, the rotating arm (22) is arranged vertically downward. When an external force pushes the rotating arm (22), the rotating arm (22) rotates in a first direction and squeezes and triggers the micro switch assembly; when the external force is lost, the rotating arm (22) rotates in a second direction under the action of its own weight to disengage from the micro switch assembly, and the first direction is opposite to the second direction.

2. The interlocking assembly according to claim 1, characterized in that: The interlocking bracket (1) is provided with a rotating shaft (11), the interlocking lever (2) is provided with a rotating ring (21), the rotating ring (21) is rotatably sleeved on the rotating shaft (11), and the rotating arm (22) is connected to the outer peripheral wall of the rotating ring (21).

3. The interlocking assembly according to claim 2, characterized in that: The interlocking bracket (1) is provided with a buckle (12), a clamping position is formed between the outer peripheral wall of the rotating shaft (11) and the buckle (12), a limit block (211) is provided on the outer peripheral wall of the rotating ring (21), the rotating ring (21) is inserted into the clamping position, and the limit block (211) is engaged with the buckle (12) to limit the movement of the interlocking lever (2) along the axial direction of the rotating shaft (11).

4. The interlocking assembly according to claim 3, characterized in that: The micro switch assembly comprises a first micro switch (3) and a second micro switch (4); the first micro switch (3) has a first switch contact (31), and the second micro switch (4) has a second switch contact (41); the first switch contact (31) and the second switch contact (41) are both oriented toward the interlocking lever (2); when an external force pushes the rotating arm (22), the rotating arm (22) rotates in a first direction and sequentially presses the first switch contact (31) and the second switch contact (41).

5. The interlocking assembly according to claim 4, characterized in that: The rotating arm (22) comprises a first contact wall surface (221) and a second contact wall surface (222); the first contact wall surface (221) is used to press the first switch contact (31); the second contact wall surface (222) is used to press the second switch contact (41); the first contact wall surface (221) is an arc-shaped structure, and the central axis of the first contact wall surface (221) coincides with the central axis of rotation of the interlocking lever (2).

6. The interlock assembly according to claim 4, characterized in that: The interlocking bracket (1) is provided with a guide rib (13) for driving the door hook of the microwave oven to rotate, and the guide rib (13) is arranged obliquely from bottom to top toward the rotating arm (22).

7. The interlock assembly according to claim 6, characterized in that: The interlocking assembly further comprises a third micro switch (5), the third micro switch (5) being arranged on the interlocking bracket (1), and the third micro switch (5) being provided with a third micro switch contact (51) for resetting and squeezing the door hook of the microwave oven after passing through the guide rib (13).

8. A microwave oven, characterized in that: Comprising an interlocking assembly as claimed in any one of claims 1 to 7.

9. The microwave oven according to claim 8, characterized in that: The microwave oven comprises an oven door (6), a tension spring (8) and a door hook (7) rotatably arranged on the oven door (6); one end of the tension spring (8) is connected to the door hook (7) and the other end is connected to the oven door (6).

10. The microwave oven according to claim 9, characterized in that The door hook (7) comprises a door hook body (71) and a driving block (72) extending downwardly along the bottom wall of the door hook body (71); the door hook body (71) is rotatably connected to the furnace door (6); the tension spring (8) is connected to the door hook body (71); and the driving block (72) is used to drive the rotating arm (22) to rotate and to trigger the third micro switch of the interlocking assembly.

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