Interlocking assembly and cooking equipment using the same

Abstract

An interlocking assembly and a cooking device using the interlocking assembly, wherein a second micro switch, a pull rod and a first micro switch are sequentially installed on a bracket from top to bottom, the pull rod can trigger the first micro switch and the second micro switch when it moves inwards, the pull rod has a tendency to reset outwards under the action of a first elastic member, an active push rod is located below the first micro switch, the inner end of the active push rod has a tooth portion meshing with a driven gear, the active push rod can drive the driven gear to release the limit on the pull rod when it moves inwards under the action of an external force, and the active push rod after the inward movement maintains a tendency to reset outwards under the action of a second elastic member. The interlocking assembly uses the rotation of the driven gear to release the limit on the pull rod and make the pull rod move inwards, thereby improving the safety of use. In the process of closing the door assembly of the cooking device, the active push rod is squeezed first and then the pull rod, and there is no need to add a structure to the door assembly, and the door structure is more concise.

Description

Technical Field

[0001] The invention relates to cooking equipment, in particular to an interlocking component and cooking equipment using the interlocking component. Background Art

[0002] In existing kitchen appliances such as microwave ovens, electric steamers and electric ovens, the door opening method is generally designed to be a sliding door, and for this door opening method, there are corresponding door interlock components. The existing conventional door interlock components generally include a door body and a box front plate that matches the door body, a door hook is installed on the door body, a door interlock bracket is installed on the box front plate, and a micro switch triggered by the door hook is installed on the door interlock bracket. For example, the "Universal Microwave Oven Door Interlocking Mechanism" disclosed in the Chinese utility model patent with patent number ZL 201020545967.5 (authorization announcement number CN201925981U) includes a switch seat, a door hook and a front plate. Multiple switches can be placed on the switch seat, and an action key for operating the switch is provided at the position corresponding to each switch. The door hook is provided on the oven door of the microwave oven and is combined with or disengaged from the switch seat as the oven door is opened or closed. The door hook has at least one hook portion for triggering the switches by touching the action keys, and the front plate is used to fix the switch seat on the cavity of the microwave oven.

[0003] The door interlock of existing cooking equipment with microwave function is connected by squeezing the convex ribs on the door assembly. Since the microwave function can be activated after the interlock assembly is connected, there is a situation where the user accidentally activates the microwave, leaving a safety hazard. Due to the requirements of safety regulations, when the product closes the door and prepares to start working, the first high-voltage switch must be connected first, and then the second high-voltage switch; when the product is cooked and the user opens the door, the second high-voltage switch must be disconnected first, and then the first high-voltage switch must be disconnected. Otherwise, if the order of the two high-voltage switches is wrong, the product will automatically start the protection program and blow up the fuse on the electric control panel to prevent the product from working. In addition, for products with microwave functions, according to safety regulations, there must be at least one high-voltage switch that cannot be touched by fingers. In summary, further improvements need to be made to the existing door interlock assembly. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide an interlocking assembly with a simple structure, safe use and reliability in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a cooking device with an interlocking assembly having high safety in use, in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the interlocking assembly includes a bracket, on which a second microswitch, a pull rod and a first microswitch are installed in sequence from top to bottom, and the inward movement of the pull rod can trigger the first microswitch and the second microswitch in sequence, and the pull rod has a tendency to reset outward under the action of the first elastic member after moving inward, and is characterized in that: an active push rod and a driven gear are also installed on the bracket, the active push rod is located below the first microswitch, and the inner end of the active push rod has a tooth portion meshing with the driven gear, the inward movement of the active push rod can drive the driven gear to release the limit on the pull rod so that the pull rod can move inward under the action of an external force, and the active push rod after moving inward maintains a tendency to reset outward under the action of the second elastic member.

[0007] The driven gear can have a variety of structures, the driven gear includes a first gear and a second gear meshing with each other, the first gear is located below the second gear and meshing with the tooth portion, the side of the second gear is provided with radially distributed strip grooves, the strip grooves are formed with openings on the outer periphery of the second gear, driven by the active push rod and the first gear, the second gear can rotate to the horizontal position of the strip groove and correspond to the pull rod, so that the pull rod can move inwards and be inserted into the strip groove. In this way, the driven gear can avoid the pull rod moving inwards, so that the pull rod can move inwards smoothly.

[0008] Further preferably, the first gear and the second gear are of the same size.

[0009] In order to ensure that the first microswitch and the second microswitch can be closed and opened in sequence, a first contact is provided at the top of the first microswitch, a second contact is provided at the bottom of the second microswitch, a first touch block for triggering the first contact is provided at the bottom of the pull rod, and a second touch block for triggering the second contact is provided at the top of the pull rod, and the pull rod triggers the first microswitch and the second microswitch in sequence during the inward movement, and disconnects the second microswitch and the first microswitch in sequence during the outward resetting process.

[0010] The first elastic member can have a variety of mounting structures. Preferably, the bracket is provided with a horizontally distributed first mounting column, the pull rod is provided with a second mounting column corresponding to the first mounting column, the first elastic member is a first spring, the inner end of the first spring is sleeved on the first mounting column, and the outer end of the first spring is sleeved on the second mounting column. In this way, after the pull rod moves inward, the first spring is compressed, thereby exerting an outward elastic force on the pull rod, thereby keeping the pull rod with a tendency to return outward.

[0011] In order to make the pull rod move more smoothly, a guide block for guiding the movement of the pull rod is provided on the bracket.

[0012] The second elastic member can have a variety of installation structures. Preferably, the outer end of the active push rod has a limit block, the bracket is provided with a fixed block, the active push rod passes through the fixed block and the limit block is located on the outside of the fixed block, the second elastic member is a second spring sleeved on the active push rod, the outer end of the second spring is abutted against the limit block, the inner end of the second spring is abutted against the fixed block, the active push rod extends outward from the bracket in an outward resetting state and the limit block is arranged in the bracket.

[0013] In order to make the active push rod move more smoothly, a support block for supporting the active push rod is installed on the bracket, and the support block is located on the inner side of the fixed block.

[0014] In order to enable both the pull rod and the active push rod to maintain horizontal movement, the pull rod and the active push rod are both arranged horizontally.

[0015] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is as follows: the cooking device includes a cooking cavity and a cavity front plate arranged on the front side of the cooking cavity, a door assembly is installed on the front side of the cavity front plate, and is characterized in that: the interlocking assembly is installed on the outer wall of the cooking cavity, a socket corresponding to the pull rod is opened on the cavity front plate, the front end of the active push rod has an extension portion extending forward from the cavity front plate, the extension portion is located below the socket, a convex column that can be inserted into the socket and can act on the pull rod is provided on the inner side wall of the door assembly, and in the process of closing the door assembly upward, the inner side wall of the door assembly presses the active push rod and drives the active push rod to move inward first, and the convex column presses the pull rod and drives the pull rod to move inward later.

[0016] Compared with the prior art, the advantages of the present invention are: the inward movement of the active push rod of the interlocking assembly can drive the driven gear to rotate, and can rotate to the limit position of the pull rod. At this time, the pull rod can move inward and the micro switch can be closed, thereby improving the safety and reliability of use. The active push rod is located below the pull rod. During the closing process of the door assembly of the cooking equipment, the active push rod is first squeezed, and then the pull rod is squeezed. There is no need to add a structure for squeezing the active push rod in the door assembly, so that the door body structure is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the interlocking assembly of the embodiment of the present invention when the micro switch is not triggered;

[0018] Figure 2 It is a schematic diagram of the structure of the interlocking assembly of an embodiment of the present invention in a micro switch triggered state;

[0019] Figure 3 A schematic diagram of the structure of a pull rod according to an embodiment of the present invention;

[0020] Figure 4is a schematic structural diagram of an active push rod according to an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the cooking device according to an embodiment of the present invention when the door is open;

[0022] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0023] Figure 7 It is a schematic diagram of the structure of the cooking device according to an embodiment of the present invention when the door is closed;

[0024] Figure 8 for Figure 7 A partial schematic diagram after removing the cavity front plate. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] like Figures 1 to 4 As shown, the interlocking assembly of this embodiment includes a bracket 1, on which a positioning column 15 for mounting a first micro switch 2 and a second micro switch 3 is provided, wherein the first micro switch 2 is a first high-voltage switch, and the second micro switch 3 is a second high-voltage switch. Figure 1 The direction indicated by the middle arrow B is the forward direction, and the first micro switch 2 is located in front of and below the second micro switch 3. A first contact 21 is provided at the top of the first micro switch 2, and a second contact 31 is provided at the bottom of the second micro switch 3.

[0027] A horizontally distributed pull rod 4 that can move forward and backward is also installed on the bracket 1, and a guide block 12 for guiding the movement of the pull rod 4 is installed on the bracket 1. The pull rod 4 is located between the first micro switch 2 and the second micro switch 3. Figure 3 As shown, the bottom of the pull rod 4 is provided with a first bumper 41 for triggering the first contact 21, and the top of the pull rod 4 is provided with a second bumper 42 for triggering the second contact 31. The pull rod 4 sequentially triggers the first micro switch 2 and the second micro switch 3 during the inward (i.e. backward) movement, and sequentially disconnects the second micro switch 3 and the first micro switch 2 during the outward (i.e. forward) reset.

[0028] In this embodiment, a first mounting column 11 is provided on the bracket 1. Figure 3 As shown, a second mounting column 43 corresponding to the first mounting column 11 is provided on the pull rod 4, the inner end (i.e., the rear end) of the first spring 7, i.e., the first elastic member, is sleeved on the first mounting column 11, and the outer end (i.e., the front end) of the first spring 7 is sleeved on the second mounting column 43.

[0029] The bracket 1 is provided with an active push rod 5 which is horizontally distributed and can move forward and backward, and is located below the first micro switch 2. The bracket 1 is provided with a fixing block 13 and a supporting block 14, and the supporting block 14 is located on the inner side (i.e., the rear side) of the fixing block 13. The fixing block 13 is provided with a through hole for the active push rod 5 to pass through. The fixing block 13 and the supporting block 14 both support and guide the active push rod 5, so that the active push rod 5 can move smoothly.

[0030] like Figure 4 As shown, the inner end of the active push rod 5 has a tooth portion 51, and the outer end of the active push rod 5 has a limit block 52. The limit block 52 is located on the outer side (i.e., the front side) of the fixed block 13, and the front end of the active push rod 5, i.e., the front part of the limit block 52, forms a protruding portion 53. The second spring 8, i.e., the second elastic member, is sleeved on the active push rod 5, and the outer end of the second spring 8 abuts against the limit block 52, and the inner end of the second spring 8 abuts against the fixed block 13. When the active push rod 5 moves inward, the second spring 8 is compressed, and when the active push rod 5 is in the outward reset state, the protruding portion 53 protrudes outward from the bracket 1, and the limit block 52 is arranged in the bracket 1.

[0031] A driven gear 6 is mounted on the bracket 1, and the driven gear 6 is arranged at the rear side of the first micro switch 2 and the second micro switch 3. The driven gear 6 of this embodiment includes a first gear 61 and a second gear 62 meshing with each other, the first gear 61 and the second gear 62 are of the same size, the first gear 61 is located below the second gear 62 and meshes with the tooth portion 51, and the side of the second gear 62 is provided with a radially distributed strip groove 621, and the strip groove 621 forms an opening 622 on the outer periphery of the second gear 62. The active push rod 5 can drive the first gear 61 to rotate, and the first gear 61 can drive the second gear 62 to rotate. When the active push rod 5 moves inward, the strip groove 621 of the second gear 62 rotates to a horizontal position, that is, the strip groove 621 is aligned with the insertion rod 44 at the rear end of the pull rod 4. At this time, the second gear 62 releases the limit on the pull rod 4, so that the pull rod 4 can move inward under the action of external force, and the insertion rod 44 is inserted into the strip groove 621. After the pull rod 4 moves inward, the first spring 7 is compressed, so that the pull rod 4 has a tendency to return outward.

[0032] like Figures 5 to 7 As shown, the cooking device of this embodiment is a cooking device with microwave function, such as a microwave oven, a steam-microwave all-in-one machine, a steam-bake-microwave all-in-one machine, etc., which includes an inner pot 100, a cavity front plate 101 is installed on the front side of the inner pot 100, a door assembly 102 is installed on the cavity front plate 101, a bracket 1 of the interlocking assembly is installed on the right outer side wall of the inner pot 100, a plug hole 103 corresponding to the pull rod 4 is opened on the cavity front plate 101, and the extension part 53 of the active push rod 5 extends forward from the cavity front plate 101, and the extension part 53 is located below the plug hole 103. A convex column 104 matching the pull rod 4 is provided on the inner side wall of the door assembly 102.

[0033] The action process of the interlocking structure is as follows:

[0034] When closing the door, first, the inner side wall of the door assembly 102 first presses the extension 53 to make the active push rod 5 move inward, and the inward movement of the active push rod 5 drives the first gear 61 and the second gear 62 to rotate. When the second gear 62 rotates to the horizontal position of the strip groove 621 and aligns with the insertion rod 44 of the pull rod 4, as shown in FIG. Figure 2 and Figure 8 As shown, the second gear 62 releases the limit on the pull rod 4, so that when the door is further closed, the protrusion 104 of the door assembly 102 can smoothly insert into the insertion hole 103 and press the pull rod 4 inward, driving the pull rod 4 to move inward. When the pull rod 4 moves inward, the first micro switch 2 and the second micro switch 3 are triggered and closed successively, meeting the safety requirements.

[0035] When the door is opened, first, under the action of the first spring 7, the pull rod 4 is reset forward; then, under the action of the second spring 8, the active push rod 5 is reset forward, driving the first gear 61 and the second gear 62 to rotate, and finally, the strip groove 621 is in a vertical position, as shown in FIG. Figure 1 and Figure 6 As shown, at this time, the second gear 62 can prevent the pull rod 4 from moving inward. In addition, during the forward reset process of the pull rod 4, the second micro switch 3 and the first micro switch 2 are disconnected successively.

Claims

1. An interlocking assembly, comprising a bracket, on which a second micro switch (3), a pull rod (4) and a first micro switch (2) are sequentially mounted from top to bottom, wherein the pull rod (4) can sequentially trigger the first micro switch (2) and the second micro switch (3) when it moves inward, and the pull rod (4) has a tendency to return outward under the action of a first elastic member after moving inward, characterized in that: An active push rod (5) and a driven gear (6) are also mounted on the bracket (1). The active push rod (5) is located below the first micro switch (2). The inner end of the active push rod (5) has a tooth portion (51) meshing with the driven gear (6). The inward movement of the active push rod (5) can drive the driven gear (6) to release the limit on the pull rod so that the pull rod (4) can move inward under the action of an external force. Moreover, after the inward movement, the active push rod (5) maintains a tendency to return outward under the action of a second elastic member. The pull rod (4) and the active push rod (5) are both arranged horizontally. The driven gear (6) includes a tooth portion (51) meshing with each other. A first gear (61) and a second gear (62) are connected together, the first gear (61) is located below the second gear (62) and meshes with the tooth portion (51), the side of the second gear (62) is provided with a radially distributed strip groove (621), and the strip groove (621) is formed with an opening (622) on the outer periphery of the second gear (62), and driven by the active push rod (5) and the first gear (61), the second gear (62) can be rotated to a horizontal position of the strip groove (621) and correspond to the pull rod (4), so that the pull rod (4) can move inward and be inserted into the strip groove (621).

2. The interlocking assembly according to claim 1, characterized in that: The first gear (61) and the second gear (62) are of the same size.

3. The interlocking assembly according to claim 1, characterized in that: The first microswitch (2) is provided with a first contact (21) at the top, the second microswitch (3) is provided with a second contact (31) at the bottom, the pull rod (4) is provided with a first contact block (41) for triggering the first contact at the bottom, and the pull rod (4) is provided with a second contact block (42) for triggering the second contact at the top, and the pull rod (4) sequentially triggers the first microswitch (2) and the second microswitch (3) during the process of moving inward, and sequentially disconnects the second microswitch (3) and the first microswitch (2) during the process of resetting outward.

4. The interlocking assembly according to claim 1, characterized in that: A first mounting column (11) is horizontally arranged on the bracket (1), a second mounting column (43) corresponding to the first mounting column is arranged on the pull rod (4), the first elastic member is a first spring (7), the inner end of the first spring (7) is sleeved on the first mounting column (11), and the outer end of the first spring (7) is sleeved on the second mounting column (43).

5. The interlocking assembly according to claim 1, characterized in that: A guide block (12) for guiding the movement of the pull rod (4) is provided on the bracket (1).

6. The interlocking assembly according to claim 1, characterized in that: The outer end of the active push rod (5) is provided with a limit block (52); the bracket (1) is provided with a fixed block (13); the active push rod (5) passes through the fixed block (13) and the limit block (52) is located outside the fixed block (13); the second elastic member is a second spring (8) sleeved on the active push rod (5); the outer end of the second spring (8) abuts against the limit block (52); the inner end of the second spring (8) abuts against the fixed block (13); the active push rod (5) extends outward from the bracket (1) in an outward resetting state and the limit block (52) is arranged inside the bracket (1).

7. The interlocking assembly according to claim 6, characterized in that: A support block (14) for supporting the active push rod (5) is installed on the bracket (1), and the support block (14) is located on the inner side of the fixed block (13).

8. A cooking device, comprising a cooking cavity (100) and a cavity front plate (101) arranged at the front side of the cooking cavity, wherein a door assembly (102) is installed at the front side of the cavity front plate, characterized in that: An interlocking assembly according to any one of claims 1 to 7 is installed on the outer wall of the cooking cavity (100), a socket (103) corresponding to the pull rod (4) is opened on the front plate (101) of the cavity, the front end of the active push rod (5) has a protruding portion (53) extending forward from the front plate (101) of the cavity, and the protruding portion (53) is located below the socket (103), and a convex column (104) that can be inserted into the socket and can act on the pull rod is provided on the inner wall of the door assembly (102), and in the process of the door assembly (102) closing upwards, the inner wall of the door assembly (102) presses the active push rod (5) and drives the active push rod (5) to move inward first, and then the convex column (104) presses the pull rod (4) and drives the pull rod (4) to move inward.

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