High-safety door opening device on cooking electric appliance

Abstract

The invention provides a high-safety door opening device on a cooking electric appliance, and aims to solve the problem of potential safety hazards caused by a mode of opening a door by directly pulling a handle or pressing a key in the prior art. A high-safety door opening device on a cooking electric appliance comprises a door frame; one side of the door body is hinged to the door frame, and a door locking assembly is arranged between the other side of the door body and the door frame; the unlocking assembly comprises a key, a linkage assembly and a stop piece located between the key and the linkage assembly. The stop piece comprises a stop position enabling the key to be in a non-pressing state and an avoiding position enabling the key to be in a pressing state. The unlocking key is arranged on the door frame and used for driving the stopping piece to be switched between the stopping position and the avoiding position. And the unlocking key is combined with the unlocking assembly to provide double protection, so that a child is prevented from being scalded by opening the door body by misoperation of the key, and the product is safer in use.

Description

Technical Field

[0001] The invention belongs to the technical field of cooking appliances, and in particular relates to a high-safety door opening device on a cooking appliance. Background Art

[0002] At present, there are many kinds of cooking appliances commonly used in kitchens, such as microwave ovens, ovens, fryers, etc. These cooking appliances not only make it more convenient for people to cook food, but also save people's time. In the prior art, most of these cooking utensils adopt the side-opening method. This door-opening method is convenient for people to operate and take and put food. The door body can be unlocked and opened by pulling the handle on the door body or pressing a button. However, such a door-opening device has certain safety hazards. For example, when there are children at home, when the children open the door body during cooking, they are not only easily scalded by the high-temperature steam in the cooking appliance, but also easy to put some objects in the cooking appliance. Therefore, it is necessary to improve the door-opening device in the prior art. Summary of the invention

[0003] The present invention provides a high-safety door opening device for a cooking appliance, aiming to solve the problem that the door opening device of the cooking appliance in the prior art directly opens the door by pulling a handle or pressing a button, which leads to potential safety hazards.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A high-safety door opening device for a cooking appliance, comprising:

[0006] Door frame;

[0007] A door body, one side of the door body is hinged to the door frame, and a door locking assembly is provided between the other side of the door body and the door frame, the door locking assembly includes a locking state in which the door body is locked to the door frame and an unlocking state in which the door body can rotate relative to the door frame;

[0008] An unlocking assembly is arranged on the door frame, the unlocking assembly comprises a button, a linkage assembly and a stopper located between the button and the linkage assembly; the button comprises a pressable state and a non-pressable state; the stopper comprises a stop position for placing the button in a non-pressable state and a avoidance position for placing the button in a pressable state; when the stopper is in the avoidance position, the button is in a pressable state, and an external force presses the button, so that the button drives the linkage assembly to drive the door locking assembly to switch to an unlocked state; when the stopper is in the stopper position, the button is in a non-pressable state; and,

[0009] An unlocking key is arranged on the door frame and is used to drive the stop member to switch between a stop position and a avoidance position.

[0010] A further solution: a key slot is provided on the front side of the door frame, the key is arranged in the key slot, and the linkage assembly is arranged on the rear side of the door frame; a driving rod and a limiting rod are provided between the key and the linkage assembly, a driving rod through hole and a limiting rod through hole are provided on the bottom wall of the key slot; the driving rod is arranged through the driving rod through hole;

[0011] When the stopper is in the stopping position, the stopper blocks the limit rod through hole and is located between the limit rod through hole and the limit rod; when the stopper is in the avoiding position, the stopper opens the limit rod through hole, and when the button is pressed, the limit rod passes through the limit rod through hole, and the button drives the linkage assembly through the driving rod to drive the door locking assembly to switch to an unlocked state.

[0012] Based on the above technical solution: by setting a driving rod between the button and the linkage assembly, when the button is in a pressable state, by pressing the button, the button drives the linkage assembly through the driving rod, so that the linkage assembly drives the door locking assembly to switch to an unlocked state; by setting a limit rod and a limit rod through hole, the stopper blocks the limit rod through hole when in the stop position, thereby preventing the limit rod from passing through the limit rod through hole, at which time the button is in a non-pressable state, and the stopper opens the limit rod through hole when in the avoidance position, at which time the limit rod can pass through the limit rod through hole, thereby making the button in a pressable state. The above setting structure is simpler and the layout is more compact.

[0013] A further solution: the stopper is rotatably disposed in the key slot via a first pin extending in the front-rear direction, and a torsion spring is disposed between the stopper and the key slot;

[0014] A keyhole extending in the left-right direction and connected to the key slot is provided on the side of the door frame, and the unlocking key is slidably and rotatably arranged in the keyhole; when the unlocking key is driven to slide toward the stopper, the unlocking key abuts against the stopper to drive the stopper to rotate and put the stopper in an avoidance position; when the unlocking key is disengaged from the stopper, the stopper is reset to the stop position under the action of a torsion spring.

[0015] Based on the above technical solution: the stopper is rotatably set in the key slot, and the unlocking key drives the stopper to rotate by sliding, so that the stopper is located in the avoidance position to open the limit rod through hole. After the unlocking key is pulled out, the stopper rotates and resets under the action of the torsion spring to re-cover the limit rod through hole, thereby being located in the stop position. The above structural layout is more optimized and easy to install, and the principle of unlocking with the unlocking key is simpler, which is convenient for users to operate.

[0016] A further solution: a first limiting groove and a second limiting groove are provided on the side wall of the key hole, and a limiting protrusion is provided on the unlocking key;

[0017] When the limiting protrusion switches from the first limiting groove to the second limiting groove, the limiting protrusion is disengaged from the first limiting groove and stuck in the second limiting groove by driving the unlocking key to slide toward the stopper and rotate forward; when the limiting protrusion switches from the second limiting groove to the first limiting groove, the limiting protrusion is disengaged from the second limiting groove and stuck in the first limiting groove by driving the unlocking key to rotate reversely and slide away from the stopper.

[0018] Based on the above technical solution: by setting a first limit groove and a second limit groove on the side wall of the keyhole, when the unlocking key is not used to unlock, the limit protrusion is stuck in the first limit groove, and when the unlocking key is used, the unlocking key is driven to slide toward the stopper and rotate forward, so that the limit protrusion is disengaged from the first limit groove and stuck in the second limit groove. When the limit protrusion is stuck in the second limit groove, the stopper will be kept in the avoidance position, which is convenient for the user to press the button and avoid the stopper from automatically resetting due to the resetting action of the torsion spring, which is convenient for the user to operate.

[0019] A further solution: the door locking assembly comprises a door hook connecting rod slidably arranged on the door body, a tension spring arranged between the door hook connecting rod and the door body, and a door hook clamping portion arranged on the door frame, wherein the door hook connecting rod is provided with a door hook;

[0020] When the door locking assembly is in a locked state, under the action of a tension spring, the door hook is hooked on the door hook engaging portion; when the door locking assembly is in an unlocked state, under the action of a tension spring, the door hook is disengaged from the door hook engaging portion.

[0021] Based on the above technical solution: the above door locking assembly can achieve automatic locking when the door is closed. When it is unlocked by the unlocking assembly, the door hook is disengaged from the door hook engaging portion, thereby facilitating the user to open the door body.

[0022] A further solution: the button is rotatably arranged in the button slot, the linkage assembly comprises a flip plate and a rotating arm, the flip plate and the rotating arm are both rotatably arranged on the door frame, and the rotating arm abuts against the upper side of the flip plate;

[0023] When the button is pressed backward, the button drives the flip plate to flip through the driving rod, and the flip plate drives the rotating arm to rotate upward, and the rotating arm drives the door hook upward and disengages from the door hook engaging portion by abutting against the lower side of the door hook; when the button is released, the rotating arm, the flip plate and the button are reset.

[0024] Based on the above technical solution: the above setting makes it convenient for the flip plate to drive the rotating arm to rotate by rotating after pressing the button, and when the rotating arm rotates upward, it abuts against the door hook to drive the door hook to disengage from the door hook clamping part, so that under the action of the tension spring, the door hook moves further forward and disengages from the door hook clamping part, so that the door body can be opened, and then the rotating arm and the flip plate automatically reset under the action of gravity, so that the operation can be repeated, and the structural layout is more reasonable.

[0025] A further solution: the button is rotatably arranged in the button slot via a longitudinal axis extending in the up-down direction, the flip plate is rotatably arranged on the door frame via a first transverse axis extending in the left-right direction, and the rotating arm is rotatably arranged on the door frame via a second transverse axis extending in the left-right direction;

[0026] The front ends of the limiting rod and the driving rod are integrally formed with the button, and the rear end of the driving rod abuts against the flip plate;

[0027] A return spring sleeved on the driving rod is arranged between the button and the bottom wall of the button slot.

[0028] Based on the above technical solution: when the button is pressed, the rear end of the driving rod abuts against the flip plate, thereby driving the flip plate to flip. The above structure is simpler and easier to assemble.

[0029] A further solution: the middle part of the flip plate is rotated on the rear side of the door frame through the two left and right first horizontal axes; the driving rod abuts against the front side of the lower part of the flip plate, and the upper end of the flip plate is provided with an abutment plate abutting against the lower side of the rotating arm.

[0030] A further solution: the door frame is further provided with a plurality of micro switches, the plurality of micro switches comprising a first micro switch located at the rear side of the door hook and a second micro switch located at the lower side of the rotating arm;

[0031] When the door locking assembly is in a locked state, the door hook triggers the first micro switch, and the door hook triggers the second micro switch by abutting against the rotating arm.

[0032] Based on the above technical solution: the above setting makes it safer after the door locking assembly is unlocked, the micro switch is disconnected, and the microwave function of the cooking appliance is turned off, so that it is safer after opening the door.

[0033] A further solution: a hook is provided on the button, a hook hole is provided on the bottom wall of the button slot, the hook passes through the hook hole, and when the button is reset forward under the action of a reset spring, the hook hooks on the rear side of the bottom wall of the button slot.

[0034] Based on the above technical solution: the above arrangement enables the hook to prevent the key from falling out of the key slot by hooking on the rear side of the bottom wall of the key slot when the key is reset forward under the action of the reset spring.

[0035] The beneficial effects of the present invention are:

[0036] In the present invention, a door locking assembly is arranged between the door body and the door frame, so that the door body and the door frame are locked together in a locked state, and the door body cannot be opened relative to the door frame. In an unlocked state, the door body and the door frame are unlocked, and the door body can be opened relative to the door frame by rotating.

[0037] By setting up an unlocking component and a stopper between the button and the linkage component, the stopper blocks the button when it is in the stop position, and the button cannot be pressed at this time, thereby preventing children from operating it by mistake; when the stopper is in the avoidance position, the button is in a pressable state, and the user presses the button to drive the linkage component to drive the door locking component to switch to the unlocking state, thereby facilitating the opening of the door body.

[0038] An unlocking key is provided to switch the stopper between a stop position and an avoidance position, thereby switching the button between a pressable state and a non-pressable state. When opening the door, the user needs to first use the unlocking key to switch the stopper to the avoidance position to unlock the button, switch the button to the pressable state, and then unlock the door locking assembly by pressing the button to open the door. The unlocking key combined with the unlocking assembly provides double protection, further preventing children and others from accidentally operating the button to open the door and causing burns and other injuries, making the product safer when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a structural schematic diagram of the cooking appliance of the present invention.

[0041] Figure 2 It is a schematic diagram of the structure in which the stopper cooperates with the unlocking key when the stopper is in the stop position.

[0042] Figure 3 It is a schematic diagram of the structure in which the stopper cooperates with the unlocking key when it is in the avoidance position.

[0043] Figure 4 It is a schematic diagram of the structure when the key is in a non-pressable state.

[0044] Figure 5 It is a schematic diagram of the structure when the key is in a depressible state and is pressed backward.

[0045] Figure 6 It is a structural schematic diagram in which a button is hinged to a door frame via a longitudinal axis.

[0046] Figure 7 It is a schematic diagram of the structure of a button, a driving rod and a limit rod.

[0047] Figure 8 It is a structural schematic diagram when the door locking assembly is in a locked state.

[0048] Fig. 9 It is a schematic diagram of the structure of the door locking assembly when it is in the unlocked state.

[0049] Fig.10 It is a schematic diagram of the structure in which the flip plate and the rotating arm are rotatably arranged on the door frame.

[0050] Fig.11 It is a structural diagram of the coordination of the door hook connecting rod and the tension spring.

[0051] Description of the numbers in the figure:

[0052] 1-body; 2-door frame; 21-button slot; 211-hook hole; 212-driving rod through hole; 213-limiting rod through hole; 214-spring seat; 22-stopper; 23-torsion spring; 24-reset spring; 25-keyhole; 251-first limiting slot; 252-second limiting slot; 26-unlocking key; 261-limiting protrusion; 27-door hook clamping part; 271-guide slope; 28-first micro switch; 29-second micro switch; 3-door body; 31-door hook connecting rod; 311-door hook; 32-tension spring; 4-button; 41-longitudinal axis; 42-limiting rod; 43-driving rod; 44-hook; 5-flip plate; 51-first horizontal axis; 52-rest plate; 6-rotating arm; 61-second horizontal axis; 7-indicator. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0054] like Figure 1 , Fig. 9 and Fig.10 As shown, this embodiment provides a high-safety door opening device for a cooking appliance, comprising:

[0055] Door frame 2;

[0056] The door body 3 has one side hinged on the door frame 2, and a door locking assembly is provided between the other side of the door body 3 and the door frame 2, and the door locking assembly includes a locking state in which the door body 3 is locked with the door frame 2 and an unlocking state in which the door body 3 can be rotated relative to the door frame 2; specifically, when the door body 3 is closed, the door locking assembly in the locked state locks the door body 3 with the door frame 2, and the door body 3 cannot be opened at this time; when the door locking assembly is in the unlocking state, the door body 3 is unlocked from the door frame 2, and the door body 3 can be opened by rotating it;

[0057] like Figures 2 to 5 As shown, an unlocking assembly is arranged on the door frame 2, and the unlocking assembly includes a button 4, a linkage assembly, and a stopper 22 located between the button 4 and the linkage assembly; the button 4 includes a pressable state and a non-pressable state; the stopper 22 includes a stop position that puts the button 4 in a non-pressable state and an avoidance position that puts the button 4 in a pressable state; when the stopper 22 is in the avoidance position, the button 4 is in a pressable state, and when an external force presses the button 4, the button 4 drives the linkage assembly to drive the door locking assembly to switch to an unlocked state; when the stopper 22 is in the stop position, the button 4 is in a non-pressable state; and,

[0058] The unlocking key 26 is arranged on the door frame 2 and is used to drive the stopper 22 to switch between the stop position and the avoidance position. Specifically, when the door lock assembly is in the locked state and the button 4 is in the non-pressible state, the user needs to open the door body 3, and then needs to use the unlocking key 26 to drive the stopper 22 to switch to the avoidance position, at which time the button 4 is in the pressable state, and then press the button 4 so that the button 4 drives the door lock assembly to switch to the unlocked state through the linkage assembly, thereby realizing the door opening.

[0059] In some specific embodiments, Figure 1 , Figure 8 , Fig. 9 and Fig.11 As shown, the door body 3 is hinged to the front side of the door frame 2 through a door shaft, and the door frame 2 is arranged on the machine body 1. The cooking appliance can be a microwave oven, an air fryer microwave oven, an electric oven, a steam oven, etc. As a specific structure of the door locking assembly, the door locking assembly includes a door hook connecting rod 31 that is slidably arranged on the door body 3, a tension spring 32 arranged between the door hook connecting rod 31 and the door body 3, and a door hook clamping portion 27 arranged on the door frame 2. The door hook connecting rod 31 is provided with a door hook 311; the tension spring 32 is arranged between the lower end of the door hook connecting rod 31 and the door body 3;

[0060] When the door lock assembly is in a locked state, the door hook 311 is hooked on the door hook engaging portion 27 under the action of the tension spring 32; when the door lock assembly is in an unlocked state, the door hook 311 is separated from the door hook engaging portion 27 under the action of the tension spring 32. Specifically, the door frame 2 is provided with a guide slope 271 inclined upward from front to back, and the door frame 2 is provided with a door hook 311 hole on the upper side of the upper end of the guide slope 271. The door hook engaging portion 27 is the upper end of the guide slope 271. When the door body 3 is closed, the door hook 311 slides upward and backward along the guide slope 271. After the door hook 311 passes through the door hook 311 hole, under the action of the tension spring 32, the door hook connecting rod 31 slides downward so that the door hook 311 is hooked on the door hook engaging portion 27. When unlocking, the linkage assembly drives the door hook 311 to disengage from the door hook engaging portion 27 upwards, and at this time, under the action of the tension spring 32, the door hook 311 passes forward through the door hook 311 hole and slides forward and downward along the guide slope 271, thereby achieving unlocking, and the door body 3 can be opened relative to the door frame 2. The door hook 311 can be provided in two upper and lower parts, and the guide slope 271 can be provided in two upper and lower parts, and the two door hooks 311 correspond to the two guide slopes 271 one by one.

[0061] In some specific embodiments, Figures 2 to 5 as well as Figure 7 As shown, the specific matching mode of the button 4 and the stopper 22 is that the front side of the door frame 2 is provided with a button slot 21, which can be specifically arranged at the lower right part of the front side of the door frame 2, the button 4 is arranged in the button slot 21, and the linkage assembly is arranged at the rear side of the door frame 2; a driving rod 43 and a limiting rod 42 are arranged between the button 4 and the linkage assembly, and a driving rod through hole 212 and a limiting rod through hole 213 are arranged on the bottom wall of the button slot 21; the driving rod 43 is arranged to pass through the driving rod through hole 212, that is, when the button 4 is pressed, the button 4 drives the linkage assembly through the driving rod 43;

[0062] When the stopper 22 is in the stop position, the stopper 22 blocks the limit rod through hole 213 and is located between the limit rod through hole 213 and the limit rod 42. At this time, the button 4 is in a non-pressible state. When the user presses the button 4 backward, the stopper 22 abuts against the limit rod 42 to prevent the button 4 from moving backward and further prevents the drive rod 43 from acting backward on the linkage assembly. When the stopper 22 is in the avoidance position, the stopper 22 opens the limit rod through hole 213. At this time, the button 4 is in a pressable state. When the button 4 is pressed, the limit rod 42 can smoothly pass through the limit rod through hole 213. The button 4 drives the linkage assembly through the drive rod 43 to drive the door locking assembly to switch to an unlocked state.

[0063] In some specific embodiments, Figures 2 to 5As shown, the stopper 22 is rotatably disposed in the key slot 21 through a first pin shaft extending in the front-to-back direction, and a torsion spring 23 is disposed between the stopper 22 and the key slot 21;

[0064] The side surface of the door frame 2, specifically the right side surface, is provided with a keyhole 25 extending in the left-right direction and connected to the key groove 21, and the unlocking key 26 is slidably and rotatably arranged in the keyhole 25, that is, the unlocking key 26 can slide left and right along the keyhole 25, and can rotate a certain angle relative to the keyhole 25 without being blocked; when the unlocking key 26 is driven to slide toward the stopper 22, the left end of the unlocking key 26 abuts against the stopper 22 to drive the stopper 22 to rotate and put the stopper 22 in an avoidance position, at which time the limit rod through hole 213 is exposed, and the button 4 is in a pressable state; when the unlocking key 26 is disengaged from the stopper 22, under the action of the torsion spring 23, the stopper 22 rotates and resets to the stop position, and the stopper 22 blocks the limit rod through hole 213, and the button 4 is in a non-pressable state.

[0065] In some specific embodiments, Figure 2 and Figure 3 As shown, in order to further facilitate user operation, the side wall of the key hole 25 is provided with a first limiting groove 251 and a second limiting groove 252, and the unlocking key 26 is provided with a limiting protrusion 261; specifically, the unlocking key 26 is arranged on the right side of the door frame 2, and the first limiting groove 251 is located on the left side of the second limiting groove 252;

[0066] When the limiting protrusion 261 switches from the first limiting groove 251 to the second limiting groove 252, the user drives the unlocking key 26 to slide toward the stopper 22 and rotates forward to make the limiting protrusion 261 disengage from the first limiting groove 251 and get stuck in the second limiting groove 252. Specifically, the unlocking key 26 slides toward the stopper 22 to first disengage from the first limiting groove 251, and when it slides to align with the second limiting groove 252, the user then rotates the unlocking key 26 forward to make the limiting protrusion 261 disengage from the first limiting groove 251 and get stuck in the second limiting groove 252. The protrusion 261 enters the second limiting groove 252. When the limiting protrusion 261 is stuck in the second limiting groove 252, the stopper 22 will be kept in the avoidance position, so that it is convenient for the user to press the button 4. When the limiting protrusion 261 switches from the second limiting groove 252 to the first limiting groove 251, the limiting protrusion 261 is disengaged from the second limiting groove 252 and stuck in the first limiting groove 251 by driving the unlocking key 26 to rotate in the opposite direction and slide away from the stopper 22. Specifically, the unlocking key 26 is first rotated in the opposite direction to disengage the limiting protrusion 261 from the second limiting groove 252, and then the unlocking key 26 is pulled to the right or under the reset action of the torsion spring 23, the stopper 22 drives the unlocking key 26 to slide to the right, so that the limiting protrusion 261 is stuck in the first limiting groove 251. The right side of the door frame 2 is provided with an indicator 7 including an unlocking indicator and a locking indicator, which is used to indicate the rotation direction of the unlocking key 26.

[0067] In some specific embodiments, Figure 6 As shown, the button 4 is rotatably arranged in the button slot 21, and the linkage assembly includes a flip plate 5 and a rotating arm 6, and the flip plate 5 and the rotating arm 6 are both rotatably arranged on the door frame 2, and the rotating arm 6 abuts against the upper side of the flip plate 5;

[0068] like Figure 4 , Figure 5 , Figure 8 and Fig. 9 As shown, when the button 4 is pressed backward, the button 4 drives the flip plate 5 to flip through the driving rod 43, and the flip plate 5 drives the rotating arm 6 to rotate upward, and the rotating arm 6 drives the door hook 311 to disengage from the door hook clamping part 27 upward by abutting against the lower side of the door hook 311. After the door hook 311 disengages from the door hook clamping part 27, under the action of the tension spring 32, the door hook 311 further disengages from the door hook clamping part 27 forward, thereby achieving unlocking; when the button 4 is released, the rotating arm 6, the flip plate 5 and the button 4 are reset.

[0069] In some specific embodiments, Figure 4 , Figure 5 , Figure 8 and Fig. 9As shown, the button 4 is rotatably disposed in the button slot 21 via a vertical axis 41 extending in the up-down direction. Specifically, the right end of the button 4 is rotatably disposed in the button slot 21 via the vertical axis 41. When the button 4 is in a pressable state, the button 4 can be rotated backward by pressing the left end of the button 4. The driving rod 43 is located on the left side of the limiting rod 42.

[0070] In some specific embodiments, Figures 8 to 10 As shown, the flip plate 5 is rotatably arranged on the door frame 2 via a first horizontal axis 51 extending in the left and right directions, and the rotating arm 6 is rotatably arranged on the door frame 2 via a second horizontal axis 61 extending in the left and right directions; specifically, the rotating structure of the flip plate 5 and the rotating arm 6 is arranged so that when the flip plate 5 rotates to drive the rotating arm 6 to rotate so that the door hook 311 is disengaged from the door hook clamping portion 27, after the button 4 is reset, the flip plate 5 and the rotating arm 6 can automatically reset when the door body 3 is closed by the door hook 311, or the flip plate 5 and the rotating arm 6 automatically reset under the action of gravity.

[0071] The front ends of the limiting rod 42 and the driving rod 43 are integrally formed with the button 4, and the rear end of the driving rod 43 abuts against the flip plate 5; specifically, the middle part of the flip plate 5 is rotatably arranged on the rear side of the door frame 2 through the two first horizontal axes 51 on the left and right; the driving rod 43 abuts against the front side of the lower part of the flip plate 5, and the upper end of the flip plate 5 is provided with a abutting plate 52 abutting against the lower side of the rotating arm 6. When the flip plate 5 rotates, the abutting plate 52 tilts upward to drive the rotating arm 6 to rotate upward.

[0072] In some specific embodiments, Figure 4 and Figure 5 As shown, a reset spring 24 sleeved on the driving rod 43 is provided between the button 4 and the bottom wall of the button slot 21. Specifically, a spring seat 214 is provided on the bottom wall of the button slot 21. The spring seat 214 is an annular sleeve portion arranged around the driving rod through hole 212, and the rear end of the spring is sleeved on the spring seat 214.

[0073] In some specific embodiments, Figures 8 to 10 As shown, in order to make the door opening safer, the door frame 2 is further provided with a plurality of micro switches, including a first micro switch 28 located at the rear side of the door hook 311 and a second micro switch 29 located at the lower side of the rotating arm 6;

[0074] When the door locking assembly is in a locked state, the door hook 311 triggers the first micro switch 28, and the door hook 311 triggers the second micro switch 29 by abutting against the rotating arm 6. When the flip plate 5 rotates to drive the rotating arm 6 to rotate, and the rotating arm 6 drives the door hook to disengage from the door hook engaging portion 27, the micro switch is disconnected, so that the microwave function or heating function of the cooking appliance is turned off, which makes it safer when opening the door body 3.

[0075] In some specific embodiments, Figure 4 and Figure 5 As shown, the button 4 is provided with a hook 44, and the bottom wall of the button slot 21 is provided with a hook hole 211, and the hook 44 is arranged through the hook hole 211. When the button 4 is reset forward under the action of the reset spring 24, the hook 44 is hooked on the rear side of the bottom wall of the button slot 21. Specifically, when the button 4 is reset forward under the action of the reset spring 24, the hook 44 is hooked on the rear side of the bottom wall of the button slot 21, thereby preventing the button 4 from being separated from the button slot 21.

[0076] Working principle description:

[0077] When the door lock assembly is in the locked state and the button 4 is in the non-pressable state, the user needs to open the door body 3. The user needs to first slide the unlocking key 26 toward the stopper 22 and then rotate the unlocking key 26 to make the limiting protrusion 261 stuck in the second limiting groove 252. The unlocking key 26 abuts against the stopper 22 to drive the stopper 22 to rotate, thereby exposing the limiting rod through hole 213. After that, the user presses the button 4 backward, and the button 4 drives the flip plate 5 to rotate through the driving rod 43. When the flip plate 5 rotates, it drives the rotating arm 6 to rotate. When the rotating arm 6 rotates, it abuts against the lower side of the door hook 311 to drive the door hook 311 upward to disengage from the door hook clamping portion 27. After disengaging from the door hook clamping portion 27, the door hook 311 further disengages from the door frame 2 forward under the action of the tension spring 32, thereby achieving unlocking. Through the double unlocking method, the product is safer during use. When closing the door body 3, first turn the unlocking key 26 and slide it to the right to disengage from the stopper 22. The stopper 22 returns to the stop position to block the limit rod 42, so that the button 4 is in a non-pressible state. Then, close the door body 3, and the door hook 311 is stuck on the door hook clamping part 27, so that the door body 3 and the door frame 2 are locked.

[0078] The present invention is not limited to the above optional implementation modes. Under the premise of not conflicting with each other, the various schemes can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shapes or structures, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A high-safety door opening device for a cooking appliance, characterized in that: include: Door frame; A door body, one side of the door body is hinged to the door frame, and a door locking assembly is provided between the other side of the door body and the door frame, the door locking assembly includes a locking state in which the door body is locked to the door frame and an unlocking state in which the door body can rotate relative to the door frame; An unlocking assembly is arranged on the door frame, the unlocking assembly comprises a button, a linkage assembly and a stopper located between the button and the linkage assembly; the button comprises a pressable state and a non-pressable state; the stopper comprises a stop position for placing the button in a non-pressable state and a avoidance position for placing the button in a pressable state; when the stopper is in the avoidance position, the button is in a pressable state, and an external force presses the button, so that the button drives the linkage assembly to drive the door locking assembly to switch to an unlocked state; when the stopper is in the stopper position, the button is in a non-pressable state; and, An unlocking key is arranged on the door frame and is used to drive the stop member to switch between a stop position and a avoidance position.

2. A high-safety door opening device for a cooking appliance according to claim 1, characterized in that: A key slot is provided on the front side of the door frame, the key is arranged in the key slot, and the linkage assembly is arranged on the rear side of the door frame; a driving rod and a limiting rod are provided between the key and the linkage assembly, a driving rod through hole and a limiting rod through hole are provided on the bottom wall of the key slot; the driving rod is arranged through the driving rod through hole; When the stopper is in the stopping position, the stopper blocks the limit rod through hole and is located between the limit rod through hole and the limit rod; when the stopper is in the avoiding position, the stopper opens the limit rod through hole, and when the button is pressed, the limit rod passes through the limit rod through hole, and the button drives the linkage assembly through the driving rod to drive the door locking assembly to switch to an unlocked state.

3. A high-safety door opening device for a cooking appliance according to claim 2, characterized in that: The stopper is rotatably arranged in the key slot via a first pin shaft extending in the front-rear direction, and a torsion spring is arranged between the stopper and the key slot; A keyhole extending in the left-right direction and connected to the key slot is provided on the side of the door frame, and the unlocking key is slidably and rotatably arranged in the keyhole; when the unlocking key is driven to slide toward the stopper, the unlocking key abuts against the stopper to drive the stopper to rotate and put the stopper in an avoidance position; when the unlocking key is disengaged from the stopper, the stopper is reset to the stop position under the action of a torsion spring.

4. The high-safety door opening device for a cooking appliance according to claim 3, characterized in that: A first limiting groove and a second limiting groove are provided on the side wall of the key hole, and a limiting protrusion is provided on the unlocking key; When the limiting protrusion switches from the first limiting groove to the second limiting groove, the limiting protrusion is disengaged from the first limiting groove and stuck in the second limiting groove by driving the unlocking key to slide toward the stopper and rotate forward; when the limiting protrusion switches from the second limiting groove to the first limiting groove, the limiting protrusion is disengaged from the second limiting groove and stuck in the first limiting groove by driving the unlocking key to rotate reversely and slide away from the stopper.

5. The high-safety door opening device for a cooking appliance according to claim 2, characterized in that: The door locking assembly comprises a door hook connecting rod slidably arranged on the door body up and down, a tension spring arranged between the door hook connecting rod and the door body, and a door hook clamping portion arranged on the door frame, wherein the door hook connecting rod is provided with a door hook; When the door locking assembly is in a locked state, under the action of a tension spring, the door hook is hooked on the door hook engaging portion; when the door locking assembly is in an unlocked state, under the action of a tension spring, the door hook is disengaged from the door hook engaging portion.

6. A high-safety door opening device for a cooking appliance according to claim 5, characterized in that: The button is rotatably arranged in the button slot, the linkage assembly comprises a flip plate and a rotating arm, the flip plate and the rotating arm are both rotatably arranged on the door frame, and the rotating arm abuts against the upper side of the flip plate; When the button is pressed backward, the button drives the flip plate to flip through the driving rod, and the flip plate drives the rotating arm to rotate upward, and the rotating arm drives the door hook upward and disengages from the door hook engaging portion by abutting against the lower side of the door hook; when the button is released, the rotating arm, the flip plate and the button are reset.

7. A high-safety door opening device for a cooking appliance according to claim 6, characterized in that: The button is rotatably arranged in the button slot via a longitudinal axis extending in the up-down direction, the flip plate is rotatably arranged on the door frame via a first transverse axis extending in the left-right direction, and the rotating arm is rotatably arranged on the door frame via a second transverse axis extending in the left-right direction; The front ends of the limiting rod and the driving rod are integrally formed with the button, and the rear end of the driving rod abuts against the flip plate; A return spring sleeved on the driving rod is arranged between the button and the bottom wall of the button slot.

8. The high-safety door opening device for a cooking appliance according to claim 6, characterized in that: The middle part of the flip plate is rotatably arranged on the rear side of the door frame through the two first horizontal axes on the left and right sides respectively; The driving rod abuts against the front side of the lower part of the flip plate, and the upper end of the flip plate is provided with an abutting plate abutting against the lower side of the rotating arm.

9. A high-safety door opening device for a cooking appliance according to claim 8, characterized in that: The door frame is also provided with a plurality of micro switches, the plurality of micro switches comprising a first micro switch located at the rear side of the door hook and a second micro switch located at the lower side of the rotating arm; When the door locking assembly is in a locked state, the door hook triggers the first micro switch, and the door hook triggers the second micro switch by abutting against the rotating arm.

10. The high-safety door opening device for a cooking appliance according to claim 7, characterized in that: The button is provided with a hook, and the bottom wall of the button slot is provided with a hook hole, through which the hook is arranged. When the button is reset forward under the action of a reset spring, the hook is hooked on the rear side of the bottom wall of the button slot.

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