Door opening and closing limiting device on cooking utensil

Abstract

The invention provides a door opening and closing limiting device on a cooking utensil, and aims to solve the problem that in the prior art, when a user operates a cooking electric appliance, the door is not closed in place or a pull-out type inner pot is not assembled in place. A door opening and closing limiting device on a cooking utensil comprises a door body provided with a first locking piece; a second locking piece is rotationally arranged on the machine body; the elastic piece is arranged between the second locking piece and the machine body; the door body has a closed state and an open state relative to the machine body; when the door body is switched from the open state to the closed state, under the action of the elastic piece, the second locking piece and the first locking piece are locked so that the door body can be kept in the closed state. The door can be closed in place, and risks are avoided.

Description

Technical Field

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

[0002] At present, people are more and more accustomed to cooking food with cooking appliances, which provide great convenience to people's lives. Commonly used cooking appliances in the kitchen, such as microwave ovens and air fryers, have certain risks when users close the door or install the pull-out inner pot into the body. If the door is not closed properly or the pull-out inner pot is not assembled properly, there will be certain risks, such as microwave leakage from microwave ovens and hot air from air fryers scalding users, so further improvement is needed. Summary of the invention

[0003] The invention provides a door opening and closing limit device on a cooking appliance, aiming to solve the problem in the prior art that when a user of a cooking appliance operates the cooking appliance, there is a risk of the door not being closed properly or the pull-out inner pot not being assembled properly.

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

[0005] A switch door limit device on a cooking appliance, comprising:

[0006] The door body is provided with a first locking member;

[0007] a machine body, on which a second locking member is rotatably provided; and,

[0008] an elastic member, disposed between the second locking member and the body;

[0009] The door body includes a closed state and an open state relative to the machine body; when the door body switches from the open state to the closed state, the door body moves toward the machine body and the first locking member drives the second locking member to rotate forward to a locking position locked with the first locking member; the second locking member is kept in the locking position under the action of the elastic member and keeps the door body in the closed state;

[0010] When the door body switches from a closed state to an open state, the door body moves away from the machine body and drives the second locking member to rotate in the opposite direction to an unlocked position disengaged from the first locking member through the first locking member; and the second locking member is maintained in the unlocked position under the action of the elastic member.

[0011] A further solution: a micro switch is provided on the body, and a micro switch triggering part is provided on the second locking member;

[0012] When the door body is in a closed state, the micro switch triggering part triggers the micro switch; when the door body is in an open state, the micro switch triggering part is disengaged from the micro switch.

[0013] Based on the above technical solution: through the above arrangement, when the door body is closed, the second locking piece is driven to rotate forward to the locking position, so that the microswitch triggering part triggers the microswitch; when the door is opened, as the door body drives the second locking piece to rotate to the unlocking position, the microswitch triggering part is disengaged from the microswitch, that is, the power is cut off when the door is opened, thereby avoiding microwave leakage and providing higher safety.

[0014] A further solution: the door body is connected to the machine body in a forward and backward sliding manner.

[0015] Based on the above technical solution: the above setting enables the door body to be used on the pull-out inner pot, which is convenient for users to use.

[0016] A further solution: the first locking member is provided with a first locking portion and a first abutting portion, and the second locking member is provided with a second locking portion and a second abutting portion;

[0017] When the door body switches from an open state to a closed state, the first abutting portion abuts against the second abutting portion to drive the second locking member to rotate from an unlocking position to a locking position, and the second locking portion is locked with the first locking portion.

[0018] Based on the above technical solution: by setting a first abutment portion and a second abutment portion, when the second locking member is in the unlocked position and the user closes the door body, the first abutment portion abuts against the second abutment portion to drive the second locking member to rotate to the locked position, thereby locking the second locking member with the first locking member.

[0019] A further solution: the first locking portion is a locking hole, and the second locking portion is a locking block;

[0020] When the door body is in a closed state, the locking block is inserted into the locking hole; when the door body is in an open state, the locking block is disengaged from the locking hole.

[0021] Based on the above technical solution: the above arrangement makes it convenient to drive the second locking member to rotate during the process of opening and closing the door, so that the locking block can be rotated into the lock hole or out of the lock hole.

[0022] Further solution: the first abutment portion is the rear end portion of the first locking piece; the second abutment portion is a support foot arranged on the second locking piece and located at the rear side of the locking block; when the door body is in a closed state, the rear end portion of the first locking piece is located between the locking block and the support foot.

[0023] Based on the above technical solution: the above arrangement makes it convenient for the rear end of the first locking piece to drive the second locking piece to rotate by resting on the support foot when the door body is closed, so that the locking block can be smoothly rotated and inserted into the lock hole; when the door body is opened, the lock hole hooks the lock block to rotate the second locking piece in the opposite direction to the unlocking position, so that the lock block can be smoothly disengaged from the lock hole.

[0024] A further solution: a guide groove extending in the front-rear direction is provided on the machine body, and the first locking piece is slidably connected to the guide groove.

[0025] A further solution: the elastic member is a torsion spring, the body is provided with a first torsion spring connection part, the second locking member is provided with a second torsion spring connection part, and the two arms of the torsion spring are rotatably connected to the first torsion spring connection part and the second torsion spring connection part respectively;

[0026] When the door body is in a closed state, the torsion spring swings to a first position and gives a positive force to the second locking member to keep the second locking member in a locked position; when the door body is in an open state, the torsion spring swings to a second position and gives a reverse force to the second locking member to keep the second locking member in an unlocked position.

[0027] Based on the above technical solution: through the above setting, the torsion spring is always in an energy storage state, thereby driving the second locking member to remain in the locked position when in the first position, so that the door body remains in a closed state; the torsion spring drives the second locking member to remain in the unlocked position when in the second position.

[0028] A further solution: a limiting assembly is provided between the second locking member and the body.

[0029] A further solution: the limiting assembly comprises an arc-shaped hole provided on the second locking member and a limiting block provided on the body, and the limiting block is located in the arc-shaped hole;

[0030] When the second locking member rotates forward from the unlocking position to the locking position, the arc-shaped hole rotates forward around the limiting block until the rear side wall of the arc-shaped hole abuts against the limiting block;

[0031] When the second locking member rotates in the opposite direction from the unlocking position to the locking position, the arc-shaped hole rotates in the opposite direction around the limiting block until the front side wall of the arc-shaped hole abuts against the limiting block.

[0032] Based on the above technical solution: the limit assembly is used to prevent the second locking member from continuing to rotate forward when in the locked position; in the unlocked position, it prevents the second locking member from rotating too much, causing the first locking member to be unable to re-engage with the second locking member when closing the door.

[0033] The beneficial effects of the present invention are:

[0034] The present invention arranges a first locking piece on the door body and rotatably arranges a second locking piece on the body, so that when the user closes the door, the door body moves toward the body and the door body drives the second locking piece to rotate forward to a locking position locked with the first locking piece through the first locking piece. At this time, under the action of the elastic piece, the second locking piece keeps the door body in a closed state by locking with the first locking piece, thereby ensuring that the door is closed in place and avoiding risks. When the user opens the door, the door body is pulled in a direction away from the body. At this time, since the first locking piece is locked with the second locking piece, the second locking piece will be synchronously driven to rotate in the opposite direction to an unlocking position disengaged from the first locking piece. After that, the door body can be smoothly pulled outward further, and the second locking piece is kept in the unlocking position under the action of the elastic piece, which is convenient for closing the door body next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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 creative work.

[0036] Figure 1 The present invention is a schematic structural diagram of a switch door limit device on a cooking appliance in a closed state.

[0037] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at A.

[0038] Figure 3 The present invention is a schematic structural diagram of a switch door limit device on a cooking appliance in an open state.

[0039] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at B.

[0040] Figure 5 It is a structural schematic diagram of a pull-out inner pot provided with a first locking piece.

[0041] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at C.

[0042] Figure 7 Schematic diagram of the structure of the second locking member.

[0043] Description of the numbers in the figure:

[0044] 1-body; 11-limiting block; 12-second locking piece; 121-second torsion spring connecting portion; 122-locking block; 123-support foot; 124-micro switch triggering portion; 125-arc hole; 13-torsion spring; 14-first torsion spring connecting portion; 15-micro switch; 16-guide groove; 2-door body; 21-first locking piece; 211-locking hole; 212-first abutting portion; 22-door body handle. DETAILED DESCRIPTION

[0045] 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.

[0046] like Figures 1 to 4 As shown, this embodiment provides a door opening and closing limit device on a cooking appliance, comprising:

[0047] The door body 2 is provided with a first locking member 21;

[0048] A machine body 1, on which a second locking member 12 is rotatably provided; and,

[0049] An elastic member, disposed between the second locking member 12 and the body 1;

[0050] The door body 2 includes a closed state and an open state relative to the machine body 1; when the door body 2 is switched from the open state to the closed state, the door body 2 moves toward the machine body 1 and the first locking member 21 drives the second locking member 12 to rotate forward to a locking position locked with the first locking member 21; the second locking member 12 is kept in the locking position under the action of the elastic member and keeps the door body 2 in the closed state;

[0051] When the door body 2 switches from a closed state to an open state, the door body 2 moves away from the machine body 1 and drives the second locking member 12 to rotate in the opposite direction to an unlocked position disengaged from the first locking member 21 through the first locking member 21; and the second locking member 12 is maintained in the unlocked position under the action of the elastic member.

[0052] The switch door limit device described in this embodiment can be specifically applied to cooking appliances such as microwave ovens and ovens. The door body 2 and the machine body 1 can be set to be connected in a forward and backward sliding manner. Specifically, a accommodating cavity is provided on the machine body 1, and a pull-out inner pot is connected to the door body 2, which enters and exits the accommodating cavity in a forward and backward sliding manner, and a door body handle 22 is provided on the door body 2 to facilitate user operation. The machine body 1 is provided with a guide groove 16 extending in the front and rear direction, and the first locking member 21 is slidably connected to the guide groove 16. Specifically, when the door body 2 is closed, the first locking member 21 slides backward along the guide groove 16, and when the door body 2 is opened, the first locking member 21 slides forward along the guide groove 16. A clearance hole for the first locking member 21 to pass through and located on the front side of the guide groove 16 is provided on the machine body 1, and the first locking member 21 slides along the guide groove 16 after passing through the clearance hole.

[0053] As a specific implementation method, Figures 1 to 4 As shown, when it is applied to a microwave oven or a microwave heating appliance, in order to make the product safer, a micro switch 15 is provided on the body 1, and a micro switch triggering part 124 is provided on the second locking member 12;

[0054] When the door body 2 is in a closed state, the microswitch triggering portion 124 triggers the microswitch 15, that is, in the process of closing the door, the first locking piece 21 drives the second locking piece 12 to rotate to the locked position, and the microswitch triggering portion 124 rotates with the second locking piece 12 to the position of triggering the microswitch 15, that is, microwave heating can be started only after the door is closed, thereby preventing microwave leakage; when the door body 2 is in an open state, the microswitch triggering portion 124 disengages from the microswitch 15. Specifically, in the process of opening the door, since the first locking piece 21 and the second locking piece 12 are locked with each other, pulling the door body 2 outward will drive the second locking piece 12 to rotate to the unlocked position, and at the same time, the microswitch triggering portion 124 rotates with the second locking piece 12 to the position of disengaging from the microswitch 15, that is, the power is cut off when the door is opened, thereby preventing microwave leakage caused by accidental operation of opening the door.

[0055] In some specific embodiments, Figures 1 to 7 As shown, the first locking member 21 is provided with a first locking portion and a first abutting portion 212, and the second locking member 12 is provided with a second locking portion and a second abutting portion;

[0056] When the door body 2 switches from an open state to a closed state, the door body 2 moves toward the machine body 1, and the first abutment portion 212 drives the second locking member 12 to rotate from an unlocked position to a locked position by abutting against the second abutment portion, and locks the second locking portion with the first locking portion.

[0057] In this embodiment, Figures 1 to 7As shown, a specific structure of the first locking portion and the second locking portion is that the first locking portion is a locking hole 211, and the second locking portion is a locking block 122; specifically, the second locking member 12 is located on the upper side of the first locking member 21, and the elastic member is located at the upper end of the second locking member 12;

[0058] When the door body 2 is in a closed state, the lock block 122 is inserted into the lock hole 211, that is, in the process of closing the door, as the second locking piece 12 rotates, the lock block 122 is gradually inserted into the lock hole 211 until the door body 2 is completely closed and the second locking piece 12 rotates to the locked position. At this time, under the action of the elastic member, the lock block 122 abuts against the rear side wall of the lock hole 211, thereby keeping the door body 2 in a closed state; when the door body 2 is in an open state, the lock block 122 disengages from the lock hole 211. Specifically, when the door body 2 is pulled outward, the lock hole 211 locks with the lock block 122, thereby driving the second locking piece 12 to rotate in the opposite direction. When the lock block 122 disengages from the lock hole 211 upward, that is, rotates to the unlocked position, at this time, under the action of the elastic member, the second locking piece 12 is kept in the unlocked position, and the lock block 122 is located above the lock hole 211.

[0059] The first locking portion may also be a slot or a lock hook, and the second locking portion may also be a lock hook, so as to cooperate with the first locking portion to achieve unlocking or locking.

[0060] In some specific embodiments, Figures 1 to 7 As shown, the first abutting portion 212 is the rear end portion of the first locking member 21; the second abutting portion is a support leg 123 provided on the second locking member 12 and located at the rear side of the lock block 122, the length of the lock block 122 is preferably less than the length of the support leg 123, and the support leg 123 is provided with a bending portion, so that the first locking member 21 can abut against the bending portion; when the door body 2 is in a closed state, the rear end portion of the first locking member 21 is located between the lock block 122 and the support leg 123. Specifically, a slot is formed between the lock block 122 and the support leg 123. In the process of closing the door body 2, as the second locking member 12 rotates, the lock block 122 is inserted into the lock hole 211. When the second locking member 12 rotates to the locked position, the rear end portion of the first locking member 21, specifically the rear side wall of the lock hole 211, is clamped in the slot.

[0061] In some specific embodiments, Figure 2 and Figure 4As shown, the elastic member is a torsion spring 13, a first torsion spring connecting portion 14 is provided on the machine body 1, a second torsion spring connecting portion 121 is provided on the second locking member 12, and two arms of the torsion spring 13 are rotatably connected to the first torsion spring connecting portion 14 and the second torsion spring connecting portion 121 respectively; the second torsion spring connecting portion 121 and the locking block 122 are preferably located at opposite sides of the second locking member 12 respectively;

[0062] When the door body 2 is in a closed state, the torsion spring 13 swings to the first position and the torsion spring 13 gives the second locking member 12 a positive force to keep the second locking member 12 in the locked position, that is, in the process of closing the door, as the second locking member 12 rotates, the torsion spring 13 will be driven to swing, and when the second locking member 12 rotates to the locked position, the elastic force of the torsion spring 13 makes the second locking member 12 have a tendency to continue to rotate forward, so that the second locking member 12 is locked with the first locking member 21, and at this time, the lock block 122 is inserted into the lock hole 211 to form a driving force that drives the door body 2 to continue to move toward the machine body 1, so that the door body 2 is kept in a closed state; when the door body 2 is in an open state, the torsion spring 13 swings to the second position and the torsion spring 13 gives the second locking member 12 a reverse force to keep the second locking member 12 in the unlocked position. Specifically, this can be achieved by combining the second locking member 12 with a limit assembly, or the second locking member 12 abuts against the machine body in the unlocked position and cannot continue to rotate in the reverse direction.

[0063] In some specific embodiments, Figure 2 , Figure 4 and Figure 7 As shown, in order to limit the second locking member 12 to rotate forward or reversely between the locking position and the unlocking position, a limiting assembly is provided between the second locking member 12 and the body 1 .

[0064] Specifically, the limiting assembly includes an arc-shaped hole 125 provided on the second locking member 12 and a limiting block 11 provided on the body 1, and the limiting block 11 is located in the arc-shaped hole 125;

[0065] When the second locking member 12 rotates forward from the unlocking position to the locking position, the arc-shaped hole 125 rotates forward around the limiting block 11 until the rear side wall of the arc-shaped hole 125 abuts against the limiting block 11, so that the second locking member 12 cannot continue to rotate forward.

[0066] When the second locking member 12 rotates in the reverse direction from the unlocking position to the locking position, the arc-shaped hole 125 rotates in the reverse direction around the limiting block 11 until the front side wall of the arc-shaped hole 125 abuts against the limiting block 11, so that it cannot continue to rotate in the reverse direction.

[0067] In this embodiment, the second locking member 12 can be specifically configured to be rotatably disposed on the machine body 1 via a rotating shaft, or a set of the door opening and closing limiting devices in this embodiment can be disposed on both the left and right sides of the machine body 1 .

[0068] Working principle description:

[0069] like Figures 1 to 4 As shown, when closing the door body 2, the user moves the door body 2 toward the machine body 1, and the door body 2 abuts against the support leg 123 through the rear end of the first locking member 21, thereby driving the second locking member 12 to rotate forwardly. When rotating to the locking position, the lock block 122 is inserted into the lock hole 211 so that the second locking member 12 and the first locking member 21 are locked with each other, and the micro switch triggering part 124 triggers the micro switch 15; at this time, the second locking member 12 is kept in the locking position under the action of the elastic member, so that the door body 2 is kept in the closed state;

[0070] When the door body 2 is opened, the door body 2 moves away from the body 1. Since the first locking member 21 and the second locking member 12 are locked with each other, the door body 2 will drive the second locking member 12 to rotate in the opposite direction through the first locking member 21. During the rotation, the microswitch trigger part 124 disengages from the microswitch 15. When the second locking member 12 rotates to the unlocking position, the locking block 122 disengages from the lock hole 211. At this time, the second locking member 12 is maintained in the unlocking position under the action of the elastic member.

[0071] 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 door opening and closing limit device on a cooking appliance, characterized in that: include: The door body is provided with a first locking member; a machine body, on which a second locking member is rotatably provided; and, an elastic member, disposed between the second locking member and the body; The door body includes a closed state and an open state relative to the machine body; when the door body switches from the open state to the closed state, the door body moves toward the machine body and the first locking member drives the second locking member to rotate forward to a locking position locked with the first locking member; the second locking member is kept in the locking position under the action of the elastic member and keeps the door body in the closed state; When the door body switches from a closed state to an open state, the door body moves away from the machine body and drives the second locking member to rotate in the opposite direction to an unlocked position disengaged from the first locking member through the first locking member; and the second locking member is maintained in the unlocked position under the action of the elastic member.

2. A door opening and closing limit device for a cooking appliance according to claim 1, characterized in that: The machine body is provided with a micro switch, and the second locking member is provided with a micro switch triggering part; When the door body is in a closed state, the micro switch triggering part triggers the micro switch; when the door body is in an open state, the micro switch triggering part is disengaged from the micro switch.

3. The door opening and closing limit device for a cooking appliance according to claim 1, characterized in that: The door body is connected to the machine body in a forward and backward sliding manner.

4. A door opening and closing limit device for a cooking appliance according to claim 1, 2 or 3, characterized in that: The first locking member is provided with a first locking portion and a first abutting portion, and the second locking member is provided with a second locking portion and a second abutting portion; When the door body switches from an open state to a closed state, the first abutting portion abuts against the second abutting portion to drive the second locking member to rotate from an unlocking position to a locking position, and the second locking portion is locked with the first locking portion.

5. The door opening and closing limit device for a cooking appliance according to claim 4, characterized in that: The first locking portion is a locking hole, and the second locking portion is a locking block; When the door body is in a closed state, the locking block is inserted into the locking hole; when the door body is in an open state, the locking block is disengaged from the locking hole.

6. The door opening and closing limit device for a cooking appliance according to claim 5, characterized in that: The first abutment portion is the rear end portion of the first locking member; the second abutment portion is a support leg provided on the second locking member and located at the rear side of the locking block; when the door body is in a closed state, the rear end portion of the first locking member is located between the locking block and the support leg.

7. The door opening and closing limit device for a cooking appliance according to claim 3, characterized in that: The machine body is provided with a guide groove extending in the front-rear direction, and the first locking piece is slidably connected to the guide groove.

8. The door opening and closing limit device for a cooking appliance according to claim 1, characterized in that: The elastic member is a torsion spring, the body is provided with a first torsion spring connection part, the second locking member is provided with a second torsion spring connection part, and the two arms of the torsion spring are rotatably connected to the first torsion spring connection part and the second torsion spring connection part respectively; When the door body is in a closed state, the torsion spring swings to a first position and gives a positive force to the second locking member to keep the second locking member in a locked position; when the door body is in an open state, the torsion spring swings to a second position and gives a reverse force to the second locking member to keep the second locking member in an unlocked position.

9. A door opening and closing limit device for a cooking appliance according to claim 1 or 8, characterized in that: A limiting assembly is provided between the second locking member and the body.

10. The door opening and closing limit device for a cooking appliance according to claim 9, characterized in that: The limiting assembly comprises an arc-shaped hole arranged on the second locking member and a limiting block arranged on the body, wherein the limiting block is located in the arc-shaped hole; When the second locking member rotates forward from the unlocking position to the locking position, the arc-shaped hole rotates forward around the limiting block until the rear side wall of the arc-shaped hole abuts against the limiting block; When the second locking member rotates in the opposite direction from the unlocking position to the locking position, the arc-shaped hole rotates in the opposite direction around the limiting block until the front side wall of the arc-shaped hole abuts against the limiting block.

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