Gravity self-resetting mechanical switch structure and cooking electric appliance

Abstract

The utility model provides a gravity self-resetting mechanical switch structure and cooking electric appliance, including spacing strip, spacing strip installs on door subassembly and removes together with door subassembly, sets up the clamping groove on spacing strip, rotates the arm, rotates the arm setting on the body cooperation with door subassembly, and rotates the arm and spacing strip rotation cooperation, and the at least partial of rotating arm can selectively be connected in the clamping groove inside. Need first manual pressing rotating arm, open door subassembly again manually, can realize the door opening operation to effectively prevent the young child to open the door of cooking electric appliance through simple push -and -pull operation, avoids its because contact after heating food and electric appliance inside and scalds, and adopts the gravity effect under rotating arm's automatic reset, compares with the mode of relying on reset spring or electric drive in prior art, the structure is relatively simple, also is not affected by electromagnetic influence or spring fatigue influence, reduces production and maintenance cost, promotes consumer's use safety feeling and purchase willingness to cooking electric appliance.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, specifically to a gravity self-resetting mechanical switch structure and a cooking appliance. Background Technology

[0002] In the realm of household kitchen appliances, common examples include microwave ovens and ovens. These appliances typically employ a push-button door opening mechanism; pressing a button automatically opens the door, making operation simple and convenient. However, once the food inside is heated, it remains at a high temperature. In households with young children, if adults leave the appliance unattended while it's in use, a young child could easily press a button to open the door, potentially touching the food or the appliance's interior, resulting in burns.

[0003] The applicant's earlier patent application, number ZL202520619112.9, protects a two-step door opening switch structure. When the door assembly needs to be opened, the user must first rotate a knob to disengage a limiting component from the panel, allowing the user to press a button. Thus, through the combined action of the knob and button, the door assembly can only be opened by both rotation and pressing. However, this two-step switch structure relies on a return spring for locking and unlocking. The spring is a fatigue-prone component, prone to failure, which affects the implementation of the two-step switch operation. Utility Model Content

[0004] In view of this, the present invention aims to propose a gravity self-resetting mechanical switch structure and cooking appliance to solve the problems of push-button switches being easily turned on by mistake and two-step switches being prone to failure in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A gravity-driven self-resetting mechanical switch structure includes a limiting strip mounted on a door assembly and moving with the door assembly, with a slot provided on the limiting strip; and a rotating arm disposed on a body that cooperates with the door assembly, the rotating arm rotatingly cooperating with the limiting strip, at least a portion of the rotating arm selectively engaging within the slot.

[0007] Furthermore, a pressing post is provided on the rotating arm, and the pressing post is located at one end of the rotating arm near the inside of the slot.

[0008] Furthermore, the rotating arm is configured as a bent block structure, and a second connecting hole is provided in the middle or near the middle of the rotating arm. The rotating arm is connected to the pin through the second connecting hole, and the rotating arm can rotate relative to the pin under the action of external force.

[0009] Furthermore, one end of the rotating arm is configured as an arc-shaped end, which engages with a slot on the limiting strip, allowing the arc-shaped end to rotate out of or rotate into the slot.

[0010] Furthermore, a connecting post is provided on the side of the rotating arm near the arc-shaped end, and the pressing post is connected to the rotating arm through the connecting post.

[0011] Furthermore, the end of the rotating arm away from the arc-shaped end is a limiting end, and a protrusion is provided on the limiting end.

[0012] Furthermore, the pressing column includes a pressing rod and a connecting end provided at the lower end of the pressing rod, wherein the connecting end is connected to the connecting column.

[0013] Furthermore, it also includes a bracket, which is configured as a block structure. The bracket is provided with a first connecting hole, which is located on the side near the rotating arm. A pin is installed inside the first connecting hole, and the bracket is connected to the rotating arm through the first connecting hole and the pin.

[0014] Furthermore, the bracket is also provided with a guide part, which is configured as an arc-shaped structure. A stop block is also provided on one side edge of the bracket facing the rotating arm, and the stop block is configured to protrude in the direction close to the limiting strip.

[0015] Compared with existing technologies, the gravity self-resetting mechanical switch structure of this utility model has the following advantages:

[0016] The door can only be opened by manually pressing the rotating arm and then manually opening the door assembly. Both actions are indispensable. This effectively prevents young children from opening the door of the cooking appliance through simple push-pull operations, avoiding burns from contact with heated food and the inside of the appliance. Furthermore, the rotating arm automatically resets under its own weight. Compared with existing technologies that rely on reset springs or electric drives, the structure is relatively simple and is not affected by electromagnetic interference or spring fatigue. This reduces production and maintenance costs, minimizes the risks of household cooking appliances to young children, and increases consumers' sense of security and willingness to purchase cooking appliances.

[0017] This utility model also provides a cooking appliance, including the gravity self-resetting mechanical switch structure described above.

[0018] The cooking appliance described above has the same advantages over the prior art as the gravity self-resetting mechanical switch structure, which will not be repeated here. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the cooking appliance described in this utility model;

[0020] Figure 2 This is a schematic diagram of the door hook and switch bracket assembly described in this utility model.

[0021] Figure 3 This is a schematic diagram of the door assembly and mechanical switch assembly in the normal closed state of this utility model;

[0022] Figure 3a for Figure 3 A magnified view of part A in the middle;

[0023] Figure 4 This is a side view of the door assembly and mechanical switch assembly in the normal closed state of this utility model.

[0024] Figure 5 This is a side view of the door assembly and mechanical switch assembly in the normal closed state of this utility model;

[0025] Figure 6 This is a cross-sectional view of the door assembly and mechanical switch assembly in the normal closed state of this utility model;

[0026] Figure 7 This is a schematic diagram of the door assembly and mechanical switch assembly in the normal open state of this utility model;

[0027] Figure 7a for Figure 7 A magnified view of part A in the middle;

[0028] Figure 8 This is a side view of the door assembly and mechanical switch assembly in the normal open state of this utility model.

[0029] Figure 9 This is a side view of the door assembly and mechanical switch assembly in the normal open state of this utility model;

[0030] Figure 10 This is a cross-sectional view of the door assembly and mechanical switch assembly in the normal open state of this utility model;

[0031] Figure 11 This is a schematic diagram of the limiting strip structure described in this utility model;

[0032] Figure 12 This is a schematic diagram of the rotating arm support described in this utility model;

[0033] Figure 13 This is a schematic diagram of the rotating arm described in this utility model;

[0034] Figure 14 This is a schematic diagram of the pressure bar described in this utility model.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10 Limiting strip, 11 Slot, 20 Bracket, 21 Stop block, 22 Guide part, 23 First fixing hole, 24 First connecting hole, 30 Rotating arm, 31 Second connecting hole, 32 Connecting column, 33 Limiting end, 34 Arc end, 35 Protrusion, 40 Pressing column, 41 Pressing rod, 42 Connecting end, 50 Door hook, 60 Switch bracket assembly, 70 Door assembly, 71 Door handle assembly, 80 Housing, 81 Top plate, 811 Opening, 82 Front frame. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The term "on" means directly or indirectly supported by the element.

[0038] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] like Figures 1-14 As shown, a gravity-resetting mechanical switch structure for a cooking appliance door assembly includes a limit bar 10 and a rotating arm 30. The limit bar 10 is mounted on the door assembly 70 and moves with it. The rotating arm 30 is disposed on the appliance body that cooperates with the door assembly, and the rotating arm 30 is rotatably engaged with the limit bar 10. In its natural state (i.e., without external force), the rotating arm 30 is engaged with the limit bar 10. When the rotating arm 30 is subjected to downward pressing force, it rotates clockwise downwards (towards...). Figure 6 and Figure 10(Based on the viewing angle) until the rotating arm 30 disengages from the limiting strip 10; when the pressure applied to the rotating arm is removed, the rotating arm 30 will rotate counterclockwise upwards under the action of gravity to return to its natural state. When the rotating arm disengages from the limiting strip, the user can pull the door assembly 70 to open the door assembly. That is, the user must first manually press the rotating arm and then manually open the door assembly to open the door. Both actions are indispensable. This can effectively prevent young children from opening the door of the cooking appliance through simple push and pull operations, avoiding burns caused by contact with heated food and the inside of the appliance. Furthermore, the automatic reset under the gravity of the rotating arm is simpler in structure than the existing technology that relies on a reset spring or electric drive. It is also not affected by electromagnetic influence or spring fatigue, reducing production and maintenance costs and increasing service life.

[0040] Specifically, a slot 11 is provided on the limiting strip 10, and a pressing post 40 is provided on the rotating arm 30. At least a portion of the rotating arm 30 can selectively engage with the inside of the slot 11, and the pressing post 40 is located on the end of the rotating arm 30 near the inside of the slot 11. When it is necessary to open the door assembly, the pressing post 40 is manually pressed downwards. The pressing post 40 drives the end of the rotating arm 30 near the slot 11 to rotate downwards, causing the end of the rotating arm 30 near the slot 11 to disengage from the slot.

[0041] The rotating arm 30 is configured as a bent block structure. A second connecting hole 31 is provided in the middle or near the middle of the rotating arm 30. The rotating arm 30 is connected to the pin through the second connecting hole 31, and the rotating arm 30 can rotate relative to the pin under the action of external force. One end of the rotating arm 30 is configured as an arc-shaped end 34, which cooperates with the slot 11 on the limiting strip 10. The arc-shaped end 34 can rotate out of or rotate into the slot 11. A connecting post 32 is provided on the side of the rotating arm 30 near the arc-shaped end 34. The pressing post 40 is connected to the rotating arm 30 through the connecting post 32. The connecting post 32 is located on the side away from the limiting strip 10 to avoid interference between the connecting post 32 and the limiting strip 10.

[0042] Furthermore, the end of the rotating arm 30 furthest from the arc-shaped end 34 is a limiting end 33. A protrusion 35 is provided on the side of the limiting end 33 away from the connecting column 32. The protrusion 35 extends protruding towards the end furthest from the connecting column 32. The protrusion 35 ensures that the weight of the limiting end 33 is greater than the weight of the arc-shaped end 34, thereby allowing the limiting end 33 of the rotating arm to automatically rotate counterclockwise (within) under the influence of gravity. Figure 10 (Based on the current viewpoint) Rotate to restore to the initial natural state.

[0043] In this embodiment, the rotating arm 30 is integrally molded to prevent partial detachment of components during rotation. The pressing column 40 includes a pressing rod 41 and a connecting end 42 at the lower end of the pressing rod 41. The connecting end 42 is connected to the connecting column 32 of the rotating arm 30. The pressing rod 41 extends outward to a position that the user can directly access, facilitating the user to manually press the pressing rod to open the mechanical switch structure. Preferably, the connecting end 42 can be configured as a ring structure, with the ring sleeved on the connecting column 32.

[0044] As part of the embodiments of this utility model, the rotating arm 30 and the pressing column 40 can be separately and detachably connected, or they can be set as one piece. As long as the pressing column 40 can drive the rotating arm 30 to rotate without interfering with other components, it is acceptable.

[0045] Furthermore, the rotating arm 30 is fixed by the bracket 20. Specifically, the bracket 20 is a block structure with a first fixing hole 23 on its end face near the door assembly 70. The bracket 20 is fixed to the inside of the front frame 82 or the side panel of the entire cooking appliance via the first fixing hole 23, and the bracket 20 does not move when the door assembly 70 is opened. The bracket 20 also has a first connecting hole 24 on its side near the rotating arm 30, and the first connecting hole 24 and the first fixing hole 23 are located on two adjacent faces of the bracket 20. A pin is installed inside the first connecting hole 24, and the bracket 20 is connected to the rotating arm 30 via the first connecting hole 24 and the pin, allowing the rotating arm 30 to rotate relative to the pin.

[0046] A guide portion 22 is provided at the end of the bracket 20 away from the first fixing hole 23. The guide portion 22 is designed with an arc shape, so that when pressure is applied to the pressing column 40, the lower end of the pressing column 40 moves downward along the arc-shaped guide portion 22, thereby driving the rotating arm to rotate. The guide portion 22 plays a role in limiting and guiding the movement direction of the pressing column 40, providing a moving track for the movement of the pressing column.

[0047] A limiting edge 25 is also provided on the side of the guide section 22 away from the limiting strip 10. The limiting edge 25 is configured to protrude relative to the guide section 22. The limiting edge 25 protects the guide section 22 and prevents food residue, oil stains, etc. from dripping onto the guide section 22, ensuring that the guide section 22 is kept in a clean and smooth environment for a long time.

[0048] As part of the embodiment of this utility model, a stop block 21 is also provided on one side edge of the bracket 20 facing the rotating arm 30. The stop block 21 is configured to protrude in the direction of approaching the limit bar 10. When it is necessary to open the mechanical switch assembly, the stop block 21 plays a limiting role in the rotation opening of the rotating arm 30, avoiding the rotating arm from rotating in the opposite direction due to excessive pressing.

[0049] This utility model also provides a cooking appliance, including a door assembly 70 and a housing 80. A front frame 82 is provided on the front side of the housing 80, and the door assembly 70 is mounted on the front side of the front frame 82. The housing 80 also includes a side panel. A door hook 50 is provided on the door assembly 70, and a switch bracket assembly 60 is correspondingly provided on the front frame 82 or the side panel. The door hook 50 connects to or opens with the switch bracket assembly 60 to open or close the door assembly. A door handle assembly 71 is also provided on the door assembly 70, located on the outer side, for easy access by the user to open the door assembly 70.

[0050] It also includes the aforementioned mechanical switch structure, wherein the limit bar 10 in the switch structure is fixedly installed on the door assembly 70, and the rotating arm 30 and the bracket 20 are fixed on the front frame 82 or the front side of the side panel.

[0051] Furthermore, the housing 80 also includes a top plate 81, on which an opening 811 is provided. The opening 811 is used for the pressure rod 41 of the pressing column 40 to pass through, so that the top of the pressure rod 41 is exposed outside the top plate 81, which makes it convenient for the user to perform the pressing operation, while preventing young children from contacting the pressure rod 41.

[0052] To further explain the movement of the mechanical switch structure during the opening and closing of cooking appliances, the following describes the steps of opening and closing the door assembly:

[0053] When the door is closed, the slot 11 of the limit bar 10 is blocked by the rotating arm 30. In this state, the door handle assembly 71 cannot be pulled outward, thus preventing the furnace door from being opened.

[0054] When the furnace door needs to be opened, first press the pressing column 40, which will drive the rotating arm 30 to rotate, so that the arc end 34 of the rotating arm 30 disengages from the slot 11 of the limit strip 10. Then pull the door handle assembly 71, so that the door 70 assembly drives the door hook 50 to disengage from the switch bracket assembly 60 to realize the door opening step.

[0055] After the door opening action is completed, the protrusion 35 of the rotating arm 30 rotates to the tilt position. The gravity at the end of the protrusion 35 of the rotating arm 30 will cause the rotating arm 30 to automatically rotate counterclockwise and return to the initial position.

[0056] When the door is closed, the limit bar 10 will press against the rotating arm 30 and push the rotating arm 30 to rotate clockwise. When the upper side of the rotating arm 30 is parallel to the limit bar 10, the limit bar 10 can move to the initial static position of the closed state. At this time, the rotating arm 30 will rotate counterclockwise and automatically reset due to the influence of gravity, so that the overall structure returns to the initial static position of the closed state.

[0057] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A gravity-driven self-resetting mechanical switch structure, characterized in that, include A limiting strip (10) is installed on the door assembly (70) and moves with the door assembly (70). A slot (11) is provided on the limiting strip (10). A rotating arm (30) is disposed on a body that cooperates with the door assembly (70), and the rotating arm (30) is rotatably engaged with the limiting strip (10), and at least a portion of the rotating arm (30) is selectively engaged inside the slot (11).

2. The gravity self-resetting mechanical switch structure according to claim 1, characterized in that, A pressing post (40) is provided on the rotating arm (30), and the pressing post (40) is located at one end of the rotating arm (30) near the inside of the slot (11).

3. The gravity self-resetting mechanical switch structure according to claim 1, characterized in that, The rotating arm (30) is configured as a bent block structure. A second connecting hole (31) is provided in the middle or near the middle of the rotating arm (30). The rotating arm (30) is connected to the pin through the second connecting hole (31). The rotating arm (30) can rotate relative to the pin under the action of external force.

4. The gravity self-resetting mechanical switch structure according to claim 2, characterized in that, One end of the rotating arm (30) is set as an arc end (34), which cooperates with the slot (11) on the limiting strip (10). The arc end (34) can rotate out of or rotate into the slot (11).

5. The gravity self-resetting mechanical switch structure according to claim 4, characterized in that, A connecting post (32) is provided on the side of the rotating arm (30) near the arc end (34), and the pressing post (40) is connected to the rotating arm (30) through the connecting post (32).

6. The gravity self-resetting mechanical switch structure according to claim 4, characterized in that, The end of the rotating arm (30) away from the arc-shaped end (34) is a limiting end (33), and a protrusion (35) is provided on the limiting end (33).

7. The gravity self-resetting mechanical switch structure according to claim 5, characterized in that, The pressing post (40) includes a pressing rod (41) and a connecting end (42) disposed at the lower end of the pressing rod (41), wherein the connecting end (42) is connected to the connecting post (32).

8. The gravity self-resetting mechanical switch structure according to claim 1, characterized in that, It also includes a bracket (20), which is configured as a block structure. The bracket (20) is provided with a first connecting hole (24). The first connecting hole (24) is located on one side close to the rotating arm (30). A pin is installed inside the first connecting hole (24). The bracket (20) is connected to the rotating arm (30) through the first connecting hole (24) and the pin.

9. The gravity self-resetting mechanical switch structure according to claim 8, characterized in that, The bracket (20) is also provided with a guide (22), which is an arc-shaped structure. A stop block (21) is also provided on one side edge of the bracket (20) facing the rotating arm (30), and the stop block (21) is a structure that protrudes in the direction close to the limiting strip (10).

10. A cooking appliance, characterized in that, Includes the gravity self-resetting mechanical switch structure as described in any one of claims 1 to 9.

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