High-safety door opening device on cooking electric appliance

Abstract

The utility model 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 utility model belongs to the technical field of cooking electric appliances, and particularly relates to a high-safety door opening device on a cooking electric appliance. BACKGROUND

[0002] At present, there are many kinds of cooking electric appliances commonly used in kitchens, such as microwave ovens, ovens, fryers, etc. These cooking electric 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 appliances adopt a side-opening door mode. Such a door opening mode is convenient for people to operate and take and place food materials. It only needs to pull a handle on the door body or press a button to unlock the door body and open it. However, such a door opening device has certain safety hazards. For example, when there are children at home, the children open the door body during the cooking process, which not only easily causes the children to be scalded by the high-temperature steam in the cooking electric appliance, but also easily causes the children to put some objects in the cooking electric appliance. Therefore, it is necessary to improve the door opening device in the prior art. SUMMARY

[0003] The utility model provides a high-safety door opening device on a cooking electric appliance, which aims at solving the problem that the door opening device of the cooking electric appliance in the prior art is directly pulled by a handle or pressed by a button to open the door, resulting in safety hazards.

[0004] In order to solve the above technical problems, the utility model adopts the technical scheme that:

[0005] A high-safety door opening device on a cooking electric appliance comprises:

[0006] a door frame;

[0007] a door body, one side of the door body being hinged to the door frame, and a door locking assembly being arranged between the other side of the door body and the door frame, the door locking assembly comprising a locking state for locking the door body with the door frame and an unlocking state for allowing the door body to rotate relative to the door frame;

[0008] an unlocking assembly arranged on the door frame, the unlocking assembly comprising a button, a linkage assembly and a stopper between the button and the linkage assembly; the button comprising a pressable state and an unpressable state; the stopper comprising a stop position for making the button in the unpressable state and an avoiding position for making the button in the pressable state; when the stopper is in the avoiding position, the button is in the pressable state, an external force presses the button, the button drives the linkage assembly to drive the door locking assembly to switch to the unlocking state; when the stopper is in the stop position, the button is in the unpressable state; and

[0009] an unlocking key arranged on the door frame and used for driving the stopper to switch between the stop position and the avoiding position.

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

[0011] When the stop piece is in the stop position, the stop piece blocks the limiting rod through hole and is located between the limiting rod through hole and the limiting rod; when the stop piece is in the avoiding position, the stop piece opens the limiting rod through hole, and when the key is pressed, the limiting rod passes through the limiting rod through hole, and the key drives the linkage assembly to drive the door locking assembly to switch to the unlocked state through the driving rod.

[0012] Based on the above technical scheme: by arranging the driving rod between the key and the linkage assembly, when the key is in the pressable state, the key is pressed to drive the linkage assembly through the driving rod, so that the linkage assembly drives the door locking assembly to switch to the unlocked state; by arranging the limiting rod and the limiting rod through hole, the stop piece blocks the limiting rod through hole when the stop piece is in the stop position, thereby preventing the limiting rod from passing through the limiting rod through hole, at this time the key is in the unpressable state, and the stop piece opens the limiting rod through hole when the stop piece is in the avoiding position, at this time the limiting rod can pass through the limiting rod through hole, so that the key is in the pressable state. The above-mentioned setting structure is simpler and more compact.

[0013] Further scheme: the stop piece is rotatably arranged in the key slot through a first pin shaft extending in the front-rear direction, and a torsion spring is arranged between the stop piece and the key slot;

[0014] The side surface of the door frame is provided with a keyhole extending in the left-right direction and communicating with the key slot, and the unlocking key is slidingly and rotatably arranged in the keyhole; when the unlocking key is driven to slide towards the stop piece, the unlocking key drives the stop piece to rotate and makes the stop piece be in the avoiding position by abutting on the stop piece; when the unlocking key is separated from the stop piece, the stop piece is reset to the stop position under the action of the torsion spring.

[0015] Based on the above technical scheme: the stop piece is rotatably arranged in the key slot, and the unlocking key drives the stop piece to rotate by sliding, so that the stop piece is in the avoiding position to open the limiting rod through hole, after the unlocking key is pulled out, the stop piece is rotated and reset to block the limiting rod through hole again under the action of the torsion spring, so as to be in the stop position. The above-mentioned structure layout is more optimized, is convenient to install, and the principle of unlocking of the unlocking key is simpler, which is convenient for user operation.

[0016] Further scheme: the side wall of the keyhole is provided with a first limiting groove and a second limiting groove, and the unlocking key is provided with a limiting protrusion;

[0017] When the limiting protrusion is switched from the first limiting groove to the second limiting groove, the limiting protrusion is caused to slide towards the stopper and rotate in a forward direction to be separated from the first limiting groove and clamped in the second limiting groove; when the limiting protrusion is switched from the second limiting groove to the first limiting groove, the limiting protrusion is caused to rotate in a reverse direction and slide away from the stopper to be separated from the second limiting groove and clamped in the first limiting groove.

[0018] Based on the above technical scheme: by providing the first limiting groove and the second limiting groove on the side wall of the keyhole, the limiting protrusion is clamped in the first limiting groove when the unlocking key is not used for unlocking, and the limiting protrusion is caused to slide towards the stopper and rotate in a forward direction to be separated from the first limiting groove and clamped in the second limiting groove when the unlocking key is used, so that the stopper is kept away from the position when the limiting protrusion is clamped in the second limiting groove, thereby facilitating the user to press the button and avoiding the stopper from being automatically reset due to the reset action of the torsional spring, and facilitating the user to operate.

[0019] Further scheme: the door locking assembly comprises a door hook connecting rod slidingly 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, and the door hook connecting rod is provided with a door hook.

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

[0021] Based on the above technical scheme: the door locking assembly can be automatically locked when the door is closed, and the door hook is separated from the door hook clamping portion after being unlocked by the unlocking assembly, thereby facilitating the user to open the door body.

[0022] Further scheme: the button is rotationally arranged in the button slot, the linkage assembly comprises a turnover plate and a rotating arm, the turnover plate and the rotating arm are rotationally arranged on the door frame, and the rotating arm abuts against the upper side of the turnover plate;

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

[0024] Based on the above technical scheme: the above setting is convenient for turning the rotating arm through rotation after pressing the button, and the rotating arm is driven to rotate upward by abutting against the door hook to drive the door hook to separate from the door hook clamping part, so that the door hook further separates from the door hook clamping part under the action of the tension spring, so that the door body can be opened, and then the rotating arm and the turnover plate are automatically reset under the action of gravity, so that the operation can be repeated, and the structure layout is more reasonable.

[0025] Further scheme: the button is rotatably arranged in the button slot through a longitudinal shaft extending in the up-down direction, the turnover plate is rotatably arranged on the door frame through a first transverse shaft extending in the left-right direction, and the rotating arm is rotatably arranged on the door frame through a second transverse shaft 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 turnover plate.

[0027] A reset spring is arranged between the button and the bottom wall of the button slot and surrounds the driving rod.

[0028] Based on the above technical scheme: when the button is pressed, the rear end of the driving rod abuts against the turnover plate to drive the turnover plate to turn over, and the above structure is simpler and convenient for assembly.

[0029] Further scheme: the middle part of the turnover plate is rotatably arranged on the rear side of the door frame through the left and right first transverse shafts respectively, the driving rod abuts against the front side of the lower part of the turnover plate, and the upper end of the turnover plate is provided with an abutting plate abutting against the lower side of the rotating arm.

[0030] Further scheme: the door frame is further provided with a plurality of micro switches, and the plurality of micro switches include 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 the 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 scheme: the above setting makes the micro switch be disconnected after the door locking assembly is unlocked, and the microwave function of the cooking electric appliance is turned off, so that it is safer after the door body is opened.

[0033] Further scheme: the button is provided with a clamping hook, the bottom wall of the button slot is provided with a clamping hole, the clamping hook is arranged through the clamping hole, and when the button is reset forward under the action of the reset spring, the clamping hook is hooked at the rear side of the bottom wall of the button slot.

[0034] Based on the above technical scheme: the setting makes the catch prevent the key from separating from the key groove when the key is reset forward under the action of the reset spring.

[0035] The utility model discloses the beneficial effect that:

[0036] In the utility model, the 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 the locking state, and the door body cannot be opened relative to the door frame at this time, and in the unlocking state, the door body is unlocked from the door frame, and the door body can be opened relative to the door frame by rotating at this time.

[0037] The unlocking assembly is arranged, and the stopper is arranged between the key and the linkage assembly, so that the stopper blocks the key when being in the stop position, and the key cannot be pressed at this time, thereby avoiding the misoperation of children, and when the stopper is in the avoiding position, the key is in a pressable state, and a user presses the key to drive the linkage assembly to drive the door locking assembly to switch to the unlocking state, thereby facilitating the opening of the door body.

[0038] The unlocking key is arranged to switch the stopper between the stop position and the avoiding position, so that the key is switched between the pressable state and the unpressable state, so that when the door body is opened, the user needs to use the unlocking key to switch the stopper to the avoiding position to unlock the key, so that the key is switched to the pressable state, and then the door locking assembly is unlocked by pressing the key, so that the door body is opened, and the unlocking key and the unlocking assembly provide double protection, further avoiding the misoperation of children and the like to open the door body to cause burns and the like, so that the product is safer in use. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the premise.

[0040] Figure 1 It is the structure schematic diagram of the cooking electric appliance of the utility model.

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

[0042] Figure 3 It is the structure schematic diagram of the stopper when cooperating with the unlocking key in the avoiding position.

[0043] Figure 4 It is the structure schematic diagram of the key when being in the unpressable state.

[0044] Figure 5 is the structure schematic diagram of the key in the pressable state and pressed backward.

[0045] Figure 6 is the structure schematic diagram of the key hinged on the door frame through the longitudinal axis.

[0046] Figure 7 is the structure schematic diagram of the key, the driving rod and the limiting rod.

[0047] Figure 8 is the structure schematic diagram of the door locking assembly in the locked state.

[0048] Figure 9 is the structure schematic diagram of the door locking assembly in the unlocked state.

[0049] Figure 10 is the structure schematic diagram of the turnover plate and the rotating arm rotatingly arranged on the door frame.

[0050] Figure 11 is the structure schematic diagram of the door hook connecting rod and the pull spring.

[0051] Figure label description:

[0052] 1 - body; 2 - door frame; 21 - key slot; 211 - clamping hook hole; 212 - driving rod through hole; 213 - limiting rod through hole; 214 - spring seat; 22 - stopper; 23 - torsional spring; 24 - reset spring; 25 - keyhole; 251 - first limiting groove; 252 - second limiting groove; 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 - pull spring; 4 - key; 41 - longitudinal axis; 42 - limiting rod; 43 - driving rod; 44 - clamping hook; 5 - turnover plate; 51 - first horizontal axis; 52 - abutting plate; 6 - rotating arm; 61 - second horizontal axis; 7 - indication mark. DETAILED DESCRIPTION

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

[0054] As shown in Figure 1 , Figure 9 and Figure 10 , the present embodiment provides a high-safety door opening device on a cooking electric appliance, comprising:

[0055] Door frame 2;

[0056] The door body 3 has one side hinged to 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. The door locking assembly includes a locked state in which the door body 3 is locked to the door frame 2 and an unlocked 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 to the door frame 2, and the door body 3 cannot be opened at this time. When the door locking assembly is in the unlocked 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, the 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 makes the button 4 in a non-pressable state and an avoidance position that makes 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 the 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 provided on the door frame 2 and is used to switch the stopper 22 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, if the user needs to open the door body 3, the user must first use the unlocking key 26 to switch the stopper 22 to the avoidance position. At this time, the button 4 is in the pressable state. Then, by pressing the button 4, the button 4 drives the door lock assembly to the unlocked state through the linkage assembly, thereby opening the door.

[0059] In some embodiments, Figure 1 、 Figure 8 、 Figure 9 and Figure 11 As shown, the door body 3 is hinged to the front side of the door frame 2 via a door axis, and the door frame 2 is arranged on the 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 slidable up and down on the door body 3, a tension spring 32 that is arranged between the door hook connecting rod 31 and the door body 3, and a door hook engaging portion 27 that is 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 locking assembly is in the 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 locking assembly is in the unlocked state, the door hook 311 is disengaged 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 that is 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, and 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, and when the door hook 311 passes through the door hook 311 hole, the door hook connecting rod 31 slides downward under the action of the tension spring 32, 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 upward, and at this time the door hook 311 passes through the door hook 311 hole forward under the action of the tension spring 32 and slides forward and downward along the guide slope 271, so as to realize 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 positions, and the guide slope 271 is also provided in two upper and lower positions, and the two door hooks 311 correspond to the two guide slopes 271 one by one.

[0061] In some specific embodiments, as shown in Figures 2 to 5 and Figure 7 The specific cooperation mode of the button 4 and the stop piece 22 is that the front side of the door frame 2 is provided with a button slot 21, which can be 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 on 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 passes 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 stop piece 22 is in the stop position, the stop piece 22 blocks the limiting rod through hole 213 and is located between the limiting rod through hole 213 and the limiting rod 42, and at this time the button 4 is in an unpressable state. When the user presses the button 4 backward, the stop piece 22 abuts against the limiting rod 42 to prevent the button 4 from moving backward and the driving rod 43 from acting on the linkage assembly backward. When the stop piece 22 is in the avoiding position, the stop piece 22 opens the limiting rod through hole 213, and at this time the button 4 is in a pressable state, and when the button 4 is pressed, the limiting rod 42 can smoothly pass through the limiting rod through hole 213, and the button 4 drives the linkage assembly to drive the door locking assembly to switch to the unlocked state through the driving rod 43.

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

[0064] The side of the door frame 2, specifically the right side, is provided with a keyhole 25 extending in the left-right direction and communicating with the key slot 21, and the unlocking key 26 is slidingly and rotatably arranged in the keyhole 25, that is, the unlocking key 26 can slide left and right in 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 towards the stopper 22, the left end of the unlocking key 26 drives the stopper 22 to rotate and makes the stopper 22 be in the avoiding position by abutting on the stopper 22, at this time the limiting rod through hole 213 is exposed, and the key 4 is in the pressable state; when the unlocking key 26 is separated 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 limiting rod through hole 213, at this time the key 4 is in the unpressable state.

[0065] In some specific embodiments, as shown in Figure 2 and Figure 3 In order to further facilitate user operation, a first limiting groove 251 and a second limiting groove 252 are arranged on the side wall of the keyhole 25, and a limiting protrusion 261 is arranged on the unlocking key 26; 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 block 261 is switched from the first limiting groove 251 to the second limiting groove 252, the user drives the unlocking key 26 to slide towards the stopper 22 and rotate forward to make the limiting block 261 disengage from the first limiting groove 251 and be clamped in the second limiting groove 252. Specifically, the unlocking key 26 is first slid towards the stopper 22 to disengage from the first limiting groove 251, and then the unlocking key 26 is rotated forward to make the limiting block 261 enter the second limiting groove 252 when the unlocking key 26 is slid to align with the second limiting groove 252. When the limiting block 261 is clamped in the second limiting groove 252, the stopper 22 is kept in the avoiding position, thereby facilitating the user to press the button 4. When the limiting block 261 is switched from the second limiting groove 252 to the first limiting groove 251, the unlocking key 26 is driven to rotate reversely and slide away from the stopper 22 to make the limiting block 261 disengage from the second limiting groove 252 and be clamped in the first limiting groove 251. Specifically, the unlocking key 26 is first rotated reversely to make the limiting block 261 disengage from the second limiting groove 252, and then the unlocking key 26 is pulled to the right or the stopper 22 drives the unlocking key 26 to slide to the right under the reset action of the torsional spring 23, so that the limiting block 261 is clamped in the first limiting groove 251. The right side of the door frame 2 is provided with an indication mark 7 including an unlocking indication mark and a locking indication mark, for indicating the rotating direction of the unlocking key 26.

[0067] In some embodiments, as shown in Figure 6 The button 4 is rotationally arranged in the button groove 21, the linkage assembly includes a turnover plate 5 and a rotating arm 6, the turnover plate 5 and the rotating arm 6 are both rotationally arranged on the door frame 2, and the rotating arm 6 abuts against the upper side of the turnover plate 5.

[0068] As shown in Figure 4 , Figure 5 , Figure 8 and Figure 9 When the button 4 is pressed backward, the button 4 drives the turnover plate 5 to turn over through the driving rod 43, the turnover 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, the door hook 311 further disengages from the door hook clamping part 27 forward under the action of the tension spring 32, thereby realizing unlocking. When the button 4 is released, the rotating arm 6, the turnover plate 5 and the button 4 are reset.

[0069] In some embodiments, as shown in Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, the key 4 is rotatably arranged in the key slot 21 through a longitudinal shaft 41 extending in the up-down direction, and specifically, the right end of the key 4 is rotatably arranged in the key slot 21 through the longitudinal shaft 41, and when the key 4 is in the pressable state, the key 4 can be rotated backward by pressing the left end of the key 4. The driving rod 43 is located at the left side of the limiting rod 42.

[0070] In some embodiments, as shown in Figures 8 to 10 As shown, the turnover plate 5 is rotatably arranged on the door frame 2 through a first horizontal shaft 51 extending in the left-right direction, and the rotating arm 6 is rotatably arranged on the door frame 2 through a second horizontal shaft 61 extending in the left-right direction; specifically, the turnover plate 5 and the rotating arm 6 are arranged in a rotating structure such that after the turnover plate 5 rotates to drive the rotating arm 6 to rotate so that the door hook 311 is disengaged from the door hook engaging portion 27, the turnover plate 5 and the rotating arm 6 can be automatically reset after the key 4 is reset, or the turnover plate 5 and the rotating arm 6 are automatically reset under the action of gravity when the door body 3 is closed.

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

[0072] In some embodiments, as shown in Figure 4 and Figure 5 As shown, the key 4 and the bottom wall of the key slot 21 are provided with a reset spring 24 sleeved on the driving rod 43, and specifically, the bottom wall of the key slot 21 is provided with a spring seat 214, which is an annular sleeve portion surrounding the driving rod through hole 212, and the rear end of the spring is sleeved on the spring seat 214.

[0073] In some embodiments, as shown in Figures 8 to 10 As shown, in order to make it safer when opening the door, the door frame 2 is further provided with a plurality of micro switches, and the plurality of micro switches include 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 the 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. After 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 turned off, so that the microwave function or heating function of the cooking appliance is turned off, which is safer when the door body 3 is opened.

[0075] In some embodiments, as shown in Figure 4 and Figure 5 The button 4 is provided with a clamping hook 44, the bottom wall of the button slot 21 is provided with a clamping hook hole 211, and the clamping hook 44 is arranged through the clamping hook hole 211. When the button 4 is reset forward under the action of the reset spring 24, the clamping 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 clamping hook 44 is hooked on the rear side of the bottom wall of the button slot 21, which can prevent the button 4 from disengaging from the button slot 21.

[0076] Working principle:

[0077] When the door locking assembly is in the locked state and the button 4 is in the inoperable state, the user needs to open the door body 3, and then needs to slide the unlocking key 26 towards the stop piece 22 and then rotate the unlocking key 26 to make the limiting protrusion 261 clamped in the second limiting slot 252. The unlocking key 26 drives the stop piece 22 to rotate by abutting against the stop piece 22, so that the limiting rod through hole 213 is exposed. Then the user presses the button 4 backward, the button 4 drives the flip plate 5 to rotate through the driving rod 43, and the flip plate 5 rotates to drive the rotating arm 6 to rotate. When the rotating arm 6 rotates, the door hook 311 is driven upward to disengage from the door hook engaging portion 27 by abutting against the lower side of the door hook 311. After the door hook 311 disengages from the door hook engaging portion 27, the door hook 311 further disengages from the door frame 2 forward under the action of the tension spring 32, so as to realize unlocking. Through the double unlocking mode, the product is safer during use. When the door body 3 is closed, the unlocking key 26 is first rotated and then slides rightward to disengage from the stop piece 22, the stop piece 22 is reset to the stop position to block the limiting rod 42, so that the button 4 is in the inoperable state, and then the door body 3 is closed. The door hook 311 is clamped on the door hook engaging portion 27, so that the door body 3 is locked with the door frame 2.

[0078] The utility model is not limited to the above optional implementation, under the premise of not contradicting each other, any combination between schemes; anyone can derive other various forms of products under the enlightenment of the utility model, but no matter any change in shape or structure, any technical scheme falling within the scope defined by the claims of the utility model falls within the protection scope of the utility model.

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 including a locked state in which the door body is locked to the door frame and an unlocked state in which the door body can rotate relative to the door frame; An unlocking assembly is provided on the door frame, the unlocking assembly comprising 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 which places the button in a non-pressable state and an avoidance position which places 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, whereby 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 provided on the door frame and is used for driving the stop member to switch between a stop position and a avoidance position.

2. The 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 the unlocked state.

3. The 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-back direction, and a torsion spring is provided between the stopper and the key slot; The side of the door frame is provided with a keyhole extending in the left and right directions and connected to the key slot, and the unlocking key is slidably and rotatably set in the keyhole; when the unlocking key is driven to slide toward the stopper, the unlocking key drives the stopper to rotate by abutting against the stopper and puts 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 the 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 keyhole, 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 stop member 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 stop member.

5. The high-safety door opening device for a cooking appliance according to claim 2, characterized in that: The door locking assembly includes 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; When the door locking assembly is in a locked state, the door hook is hooked on the door hook engaging portion under the action of a tension spring; when the door locking assembly is in an unlocked state, the door hook is disengaged from the door hook engaging portion under the action of a tension spring.

6. The 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, and the linkage assembly includes 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 out of 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. The 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 vertical 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 provided 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 7, characterized in that: The middle portion of the flip plate is rotatably arranged on the rear side of the door frame through the left and right first transverse axes respectively; The driving rod abuts against the front side of the lower portion of the flip plate, and the upper end of the flip plate is provided with a abutting plate abutting against the lower side of the rotating arm.

9. The high-safety door opening device for a cooking appliance according to claim 8, characterized in that: The door frame is further provided with a plurality of micro switches, the plurality of micro switches including 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. The hook is arranged through the hook hole. When the button is reset forward under the action of the reset spring, the hook is hooked on the rear side of the bottom wall of the button slot.

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