CN109419332B - Lid subassembly and cooking utensil - Google Patents

Abstract

The present invention provides a lid assembly for a cooking appliance, comprising: the inner cover is provided with a sliding chute which is arc-shaped; the lock catch is arranged on the lower surface of the inner cover and comprises a lock ring and at least one clamping part arranged on the lock ring, a protruding part is arranged at the upper end of the clamping part, and the clamping part penetrates through the sliding groove; the one end of connecting rod is connected with the inner cup and can be covered including and remove, and the other end of connecting rod is provided with the interlock groove, and the interlock groove overcoat is located on the screens portion in order to drive the hasp rotation. The lock catch provided by the invention has a simple structure, the assembly process is effectively simplified, the assembly efficiency is improved, the mass production of products is more convenient, and the production cost of the products is further reduced.

Description

Lid subassembly and cooking utensil

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a cover body assembly and a cooking appliance.

Background

At present, the fixed rotation of hasp in the electric pressure cooker upper cover is all through riveting a plurality of hanging axle on the hasp, and the hanging axle is fixed including covering through the hanging axle rotary slot that covers on again, and when the connecting rod was rotatory, it is rotatory through hanging axle drive hasp, and above-mentioned structure processing is complicated, and manufacturing cost is higher, and along with electric pressure cooker's long-term use, the riveting between hanging axle and the hasp or the welding often appears becoming flexible, leads to the hasp to close harmfully soon or even the incident appears.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a cover structure.

A second aspect of the present invention proposes a cooking appliance.

In view of the above, the first aspect of the present invention provides a cover assembly for a cooking appliance, comprising: the inner cover is provided with a sliding chute which is arc-shaped; the lock catch is arranged on the lower surface of the inner cover and comprises a lock ring and at least one clamping part arranged on the lock ring, a protruding part is arranged at the upper end of the clamping part, and the clamping part penetrates through the sliding groove; the one end of connecting rod is connected with the inner cup and can be covered including and remove, and the other end of connecting rod is provided with the interlock groove, and the interlock groove overcoat is located on the screens portion in order to drive the hasp rotation.

The cover body assembly provided by the invention comprises an inner cover, wherein an arc-shaped sliding groove is formed in the inner cover; the lock catch is arranged on the lower surface of the inner cover and comprises a lock ring and at least one clamping part arranged on the lock ring, the upper end of the clamping part is provided with a convex part, and when the sliding groove is arc-shaped and the clamping part slides in the sliding groove, the friction force between the clamping part and the sliding groove is small, so that the abrasion of the clamping part can be reduced, and the service life is prolonged; when the clamping part extends out of the sliding groove and is assembled with the linkage groove, the protruding part is erected on the connecting rod, the lock catch can be prevented from falling off, and when the sliding groove is arc-shaped and the clamping part slides in the sliding groove, the friction force between the clamping part and the sliding groove is small, so that the abrasion of the clamping part can be reduced, and the service life is prolonged; the one end of connecting rod is connected with the inner cup and can be covered including and remove, and the interlock subassembly, the interlock subassembly include body and connecting rod, and the other end of connecting rod is equipped with the interlock groove, and when screens portion stretches out behind the spout and during the assembly in interlock groove, screens portion and interlock groove looks adaptation can prevent that the hasp from droing from the inner cup, and when the connecting rod was rotatory, screens portion drove the hasp and makes hasp and connecting rod rotate simultaneously, and screens portion moves in the spout. The lock catch provided by the invention has a simple structure, the assembly process is effectively simplified, the assembly efficiency is improved, the mass production of products is more convenient, and the production cost of the products is further reduced.

In addition, the cover structure in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical solution, preferably, the latching portion is T-shaped, and includes: the clamping portion, the locking collar is connected to the one end of clamping portion, and the other end and the bulge of clamping portion are connected, and the bulge length is greater than clamping portion, clamping portion and interlock groove joint, and the bulge is spacing to the hasp.

In this technical scheme, screens portion is T shape, and screens portion still including joint portion, and the one end of joint portion is connected in the lock circle, and the other end and the bulge of joint portion are connected, and the length of bulge is greater than the length of joint portion, and when joint portion and interlock groove joint, the bulge card is located the connecting rod top, and is spacing to the hasp, can prevent that the hasp from droing, ensures cooking utensil's safety in utilization ability.

In any of the above technical solutions, preferably, the first side wall and the second side wall bent outward are disposed on two sides of the clamping portion, and the first side wall and the second side wall are respectively clamped with the interlocking groove. .

In this technical scheme, the both sides of joint portion are provided with the first lateral wall and the second lateral wall of outwards buckling, and when joint portion and interlock groove joint, first lateral wall and second lateral wall respectively with interlock groove joint, the bulge card is located the connecting rod top, spacing the hasp, prevent that the hasp from droing, ensure cooking utensil's safety in utilization ability.

In any of the above technical solutions, preferably, the first side wall and the second side wall are bent toward a center line of the engaging portion.

In the technical scheme, the first side wall and the second side wall on the clamping portion are bent towards the central line direction of the clamping portion respectively, when the clamping portion is clamped with the linkage groove, the first side wall and the second side wall are clamped with the linkage groove respectively, and the linkage groove can be prevented from being scratched by sharp burrs formed by the first side wall and the second side wall in the forming process due to the fact that the two side walls are bent inwards.

In any one of the above technical solutions, preferably, an outermost end of the first side wall forms a first inclined surface, an outermost end of the second side wall forms a second inclined surface, an included angle between the first inclined surface and a plane of the clamping portion is less than 90 °, and an included angle between the second inclined surface and the plane of the clamping portion is less than 90 °.

In this technical scheme, the outermost end of first lateral wall forms first inclined plane, the outermost end of second lateral wall forms the second inclined plane, the contained angle between the plane of first inclined plane and joint portion is less than 910, the contained angle between the plane of second inclined plane and joint portion is less than 90, specifically, joint portion is in the forming process, first inclined plane and second inclined plane can form sharp drape over one's shoulders, pass spout and interlock groove assembly back when joint portion, structural design among this technical scheme can ensure that the contact department of interlock groove and joint portion is the crooked cambered surface, with prevent sharp drape over one's shoulders on first inclined plane and the second inclined plane and rub mutually with the lateral wall in interlock groove and then scrape the interlock groove, ensure the effective connection in joint portion and interlock groove, improve cooking utensil's safe performance.

In any of the above technical solutions, preferably, the lock ring and the retainer are of an integral structure.

In the technical scheme, the lock ring and the clamping part are of an integrated structure, the integrated structure can ensure the strength of the lock ring and the clamping part, and the lock ring and the clamping part are simple to process, low in cost and easy to popularize.

In any of the above technical solutions, preferably, the lock catch forms the lock ring and the retainer portion by press forming.

In the technical scheme, the lock catch forms the lock ring and the clamping part through punch forming, the punch forming process has the characteristics of high material utilization rate and good shearing property and recycling property, and the forming mode is easy for mass production of products. In any of the above technical solutions, preferably, the support portion is disposed at a lower end of an inner side wall of the interlocking groove, and when the position-locking portion is fitted in the interlocking groove, the support portion can prevent the position-locking portion from coming off.

In this technical scheme, the lower extreme at the inside wall in interlock groove sets up the supporting part, distance more than or equal to joint portion's width between the adjacent supporting part, and the width of less than or equal to bulge, when screens portion stretches out after the spout with the assembly of interlock groove, joint portion clamp is located between two supporting parts, the bulge card is established in the top of supporting part, when the connecting rod drives the hasp rotation, the supporting part can prevent that screens portion from droing from the interlock groove, ensure the effective connection in screens portion and interlock groove, improve cooking utensil's safety in service performance and life.

In any of the above technical solutions, preferably, the support portion is provided with a guide slope in a direction away from the link so that the detent portion is installed.

In this technical scheme, the supporting part is provided with the direction inclined plane along deviating from the connecting rod in, when screens portion stretches out behind the spout and when the interlock groove assembly, the joint portion accessible direction inclined plane in the screens portion slides in the interlock inslot, simplifies the installation, improves assembly efficiency.

In any of the above technical solutions, preferably, the protruding rib is disposed on an inner side wall of the lock catch, and at least one mounting groove is disposed on the protruding rib; the limiting piece is arranged on the inner side wall of the lower surface of the inner cover and is rotatably overlapped on the convex rib after passing through the mounting groove; the number of the mounting grooves is consistent with that of the limiting pieces.

In this technical scheme, still be equipped with abrupt muscle on the inside wall of hasp, and be equipped with at least one mounting groove on the abrupt muscle, be equipped with at least one locating part on the inside wall of the lower surface of inner cup, the locating part takes place the small-angle rotation after passing through the mounting groove, then on the abrupt muscle of locating on the inside wall of hasp, can ensure that inner cup and hasp can not take place the displacement in vertical direction, effectively prevent that the hasp from coming off from the inner cup lower surface.

Specifically, the specific size and position of the inner cover upper chute and the limiting part can be adjusted according to the size of a specific cooking utensil, so that when the lock catch rotates along with the connecting rod, the limiting part is arranged on the convex rib in a lapping mode, the limiting part cannot fall off from the mounting groove, and the limiting part is arranged on the convex rib in a lapping mode.

According to a second aspect of the present invention, there is provided a cooking appliance including the lid assembly according to any one of the above-mentioned aspects, and therefore, the cooking appliance includes all the advantages of the lid structure according to the above-mentioned aspects.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates an exploded view of a cover assembly according to one embodiment of the present invention;

FIG. 2 illustrates an enlarged partial view at A of the cover assembly shown in FIG. 1 in accordance with one embodiment of the present invention;

FIG. 3 is an enlarged partial view at B of the cover assembly shown in FIG. 1 in accordance with one embodiment of the present invention;

FIG. 4 illustrates an assembled structural schematic of a cover assembly according to one embodiment of the present invention;

FIG. 5 is an enlarged partial view at C of the cover assembly shown in FIG. 4 in accordance with one embodiment of the present invention;

FIG. 6 illustrates a schematic structural view of a cover assembly according to one embodiment of the present invention;

FIG. 7 is an enlarged partial view at D of the cover assembly shown in FIG. 6 in accordance with one embodiment of the present invention;

FIG. 8 illustrates a schematic structural view of a cover assembly according to one embodiment of the present invention;

FIG. 9 is an enlarged partial view at E of the cover assembly shown in FIG. 8 in accordance with one embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:

2 lid subassembly, 4 inner lids, 40 spouts, 42 locating parts, 6 hasp, 60 joint portion, 602 bulge, 604 joint portion, 6042 first lateral wall, 6044 second lateral wall, 6046 first inclined plane, 6048 second inclined plane, 62 abrupt muscle, 64 mounting grooves, 8 connecting rods, 82 interlock grooves, 84 supporting parts, 86 direction inclined planes.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The cover assembly and the cooking appliance according to some embodiments of the present invention are described below with reference to fig. 1 to 9.

In a first aspect, the present invention provides acover assembly 2 for a cooking appliance, as shown in fig. 1 and 4, comprising: aninner cover 4, wherein asliding groove 40 is arranged on theinner cover 4; thelock catch 6 is arranged on the lower surface of theinner cover 4, thelock catch 6 comprises a lock ring and at least one clampingpart 60 arranged on the lock ring, the upper end of the clampingpart 60 is provided with aconvex part 602, and theclamping part 60 passes through thesliding groove 40; and the connectingrod 8, one end of the connectingrod 8 is connected with theinner cover 4 and can move on theinner cover 4, the other end of the connectingrod 8 is provided with alinkage groove 82, and thelinkage groove 82 is sleeved on theclamping part 60 to drive thelock catch 6 to rotate.

Thecover body assembly 2 provided by the invention comprises aninner cover 4, wherein an arc-shapedsliding groove 40 is arranged on theinner cover 4; thelock catch 6, thelock catch 6 is located on the lower surface of theinner cover 4, thelock catch 6 includes the lock ring and sets up on the lock ring and there is at least oneposition 60 on thelock catch 6, there areprojections 602 on the upper end of theposition 60, and when theposition 60 stretches out of theconcrete chute 40 and assembles with theinterlock groove 82, theprojection 602 is set up ontie rod 8, can prevent thelock catch 6 from dropping, and when theconcrete chute 40 is arc, theposition 60 slides in theconcrete chute 40, the friction betweenconcrete chute 40 and theposition 60 is minor, can reduce the abrasion of theposition 60, lengthen life; one end of the connectingrod 8 is connected with theinner cover 4 and can move on theinner cover 4, the linkage assembly comprises a body and the connectingrod 8, the other end of the connectingrod 8 is provided with alinkage groove 82, when theclamping portion 60 extends out of thesliding groove 40 and is assembled with thelinkage groove 82, theclamping portion 60 is matched with thelinkage groove 82, thelock catch 6 can be prevented from falling off from theinner cover 4, when the connectingrod 8 rotates, theclamping portion 60 drives thelock catch 6 to enable thelock catch 6 and the connectingrod 8 to rotate simultaneously, and theclamping portion 60 moves in thesliding groove 40. Thelock catch 6 provided by the invention has a simple structure, the assembly process is effectively simplified, the assembly efficiency is improved, the mass production of products is more convenient, and the production cost of the products is further reduced.

In addition, the cover structure in the above embodiment of the present invention may further have the following additional technical features:

in the above embodiment, preferably, thedetent portion 60 has a T-shape, and includes: theclamping portion 604, the locking ring is connected to the one end ofclamping portion 604, and the other end ofclamping portion 604 is connected withprotrusion 602, andprotrusion 602 length is greater than clampingportion 604,clamping portion 604 andinterlock groove 82 joint, andprotrusion 602 is spacing tohasp 6.

As shown in fig. 2 and fig. 5, in this embodiment, the position-clamping portion 60 is T-shaped, and the position-clamping portion 60 further includes aclamping portion 604, one end of theclamping portion 604 is connected to the locking ring, the other end of theclamping portion 604 is connected to the protrudingportion 602, and the length of the protrudingportion 602 is greater than that of theclamping portion 604, when theclamping portion 604 is clamped to the linkinggroove 82, theprotruding portion 602 is clamped above the connectingrod 8, so as to limit thelock catch 6, prevent thelock catch 6 from falling off, and ensure the safety performance of the cooking appliance.

In any of the above embodiments, preferably, thefirst side wall 6042 and thesecond side wall 6044 bent outward are disposed on two sides of theclamping portion 604, and thefirst side wall 6042 and thesecond side wall 6044 are respectively clamped with the interlockinggroove 82. .

As shown in fig. 2 and 5, in this embodiment, afirst side wall 6042 and asecond side wall 6044 bent outward are disposed on two sides of theclamping portion 604, when theclamping portion 604 is clamped with the linkinggroove 82, thefirst side wall 6042 and thesecond side wall 6044 are respectively clamped with the linkinggroove 82, theprotrusion 602 is clamped above the connectingrod 8 to limit thelocking buckle 6, prevent thelocking buckle 6 from falling off, and ensure the safety performance of the cooking appliance.

In any of the above embodiments, thefirst side wall 6042 and thesecond side wall 6044 are preferably bent toward the center line of theclamping portion 604.

As shown in fig. 2 and fig. 5, in this embodiment, thefirst side wall 6042 and thesecond side wall 6044 of theclamping portion 604 are respectively bent toward the center line of theclamping portion 604, when theclamping portion 604 is clamped with the linkinggroove 82, thefirst side wall 6042 and thesecond side wall 6044 are respectively clamped with the linkinggroove 82, and since both side walls are bent inward, the linkinggroove 82 can be prevented from being scratched by a sharp burr formed during the forming process of thefirst side wall 6042 and thesecond side wall 6044.

In any of the above embodiments, preferably, the outermost end of thefirst side wall 6042 forms a first inclined surface 6046, the outermost end of thesecond side wall 6044 forms a second inclined surface 6048, the angle between the first inclined surface 6046 and the plane of theclamping portion 604 is less than 90 °, and the angle between the second inclined surface 6048 and the plane of theclamping portion 604 is less than 90 °.

As shown in fig. 2 and 5, in this embodiment, an outermost end of thefirst side wall 6042 forms a first inclined surface 6046, an outermost end of thesecond side wall 6044 forms a second inclined surface 6048, an included angle between the first inclined surface 6046 and a plane of theclamping portion 604 is smaller than 910 °, an included angle between the second inclined surface 6048 and a plane of theclamping portion 604 is smaller than 90 °, specifically, during a forming process of theclamping portion 604, the first inclined surface 6046 and the second inclined surface 6048 can form a sharp burr, and after theclamping portion 604 passes through thesliding slot 40 and is assembled with the linkingslot 82, the structural design in this embodiment can ensure that a contact portion between the linkingslot 82 and theclamping portion 604 is a curved arc surface, so as to prevent the sharp burrs on the first inclined surface 6046 and the second inclined surface 6048 from rubbing against the side wall of the linkingslot 82 to scratch the linkingslot 82, ensure effective connection between theclamping portion 604 and the linkingslot 82, and improve safety performance of the cooking appliance.

In any of the above embodiments, the lock ring and the detent 60 are preferably of one-piece construction.

As shown in fig. 1, fig. 2 and fig. 5, in this embodiment, the lock ring and the lockingportion 60 are an integrated structure, and the integrated structure can ensure the strength of the lock ring and the lockingportion 60, and is simple to process, low in cost and easy to popularize.

In any of the above embodiments, thelock catch 6 is preferably formed by press-forming the lock ring and thedetent portion 60.

In this embodiment, thelock catch 6 forms the lock ring and theretainer portion 60 by stamping, the stamping process has the characteristics of high material utilization rate and good shearing property and recycling property, and the forming mode is easy for mass production of products.

In any of the above embodiments, thesupport portion 84 is preferably disposed at the lower end of the inner sidewall of the linkinggroove 82, and when the position-lockingportion 60 is sleeved in the linkinggroove 82, thesupport portion 84 can prevent the position-lockingportion 60 from coming off.

As shown in fig. 3, in this embodiment, the supportingportions 84 are disposed at the lower end of the inner side wall of the linkinggroove 82, the distance between adjacent supportingportions 84 is greater than or equal to the width of the clampingportion 604 and less than or equal to the width of the protrudingportion 602, when the clampingportion 60 extends out of the slidingslot 40 and is assembled with the linkinggroove 82, the clampingportion 604 is clamped between the two supportingportions 84, the protrudingportion 602 is clamped above the supportingportions 84, and when the connectingrod 8 drives thelock catch 6 to rotate, the supportingportions 84 can prevent the clampingportion 60 from falling off from the linkinggroove 82, ensure effective connection between the clampingportion 60 and the linkinggroove 82, and improve the safety performance and the service life of the cooking appliance.

In any of the above embodiments, thesupport portion 84 is preferably provided with aguide slope 86 in a direction away from thelink 8 for thedetent portion 60 to be mounted.

As shown in fig. 3, in this embodiment, the supportingportion 84 is provided with a guidinginclined surface 86 along a direction away from the connectingrod 8, and when the blockingportion 60 is assembled with the interlockinggroove 82 after extending out of the slidinggroove 40, the blockingportion 604 in the blockingportion 60 can slide into the interlockinggroove 82 through the guidinginclined surface 86, so as to simplify the installation and improve the assembly efficiency.

In any of the above embodiments, preferably, therib 62 is disposed on the inner side wall of thelock catch 6, and therib 62 is provided with at least one mountinggroove 64; at least one limitingpiece 42 arranged on the inner side wall of the lower surface of theinner cover 4, wherein the limitingpiece 42 is rotatably overlapped on theconvex rib 62 after passing through the mountinggroove 64; the number of the mountingslots 64 is the same as the number of the limitingmembers 42.

As shown in fig. 6 to 9, in this embodiment, a protrudingrib 62 is further disposed on an inner side wall of thelock catch 6, at least one mountinggroove 64 is disposed on the protrudingrib 62, at least one limitingmember 42 is disposed on an inner side wall of the lower surface of theinner lid 4, the limitingmember 42 rotates at a small angle after passing through the mountinggroove 64, and the limitingmember 42 is disposed on the protrudingrib 62 disposed on the inner side wall of thelock catch 6, so as to ensure that theinner lid 4 and thelock catch 6 do not displace in the vertical direction, and effectively prevent thelock catch 6 from falling off from the lower surface of.

Specifically, the specific size and position of the slidingslot 40 and the position-limitingmember 42 on theinner lid 4 can be adjusted according to the size of the specific cooking utensil, so that when thelock catch 6 rotates along with the connectingrod 8, the position-limitingmember 42 is disposed on the protrudingrib 62 and cannot fall off from the mountingslot 64, and the position-limitingmember 42 is disposed on the protrudingrib 62.

The second aspect of the present invention provides a cooking appliance, which comprises thecover assembly 2 according to any one of the above embodiments, therefore, the cooking appliance includes all the advantages of the cover structure according to the above embodiments.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A cover assembly for a cooking appliance, comprising:

the inner cover is provided with a sliding groove, and the sliding groove is arc-shaped;

the lock catch is arranged on the lower surface of the inner cover and comprises a lock ring and at least one clamping part arranged on the lock ring, a protruding part is arranged at the upper end of the clamping part, and the clamping part penetrates through the sliding groove;

one end of the connecting rod is connected with the inner cover and can move on the inner cover, the other end of the connecting rod is provided with a linkage groove, and the linkage groove is sleeved on the clamping part to drive the lock catch to rotate;

the supporting part is arranged at the lower end of the inner side wall of the linkage groove, and when the clamping part is sleeved in the linkage groove, the supporting part can prevent the clamping part from falling off;

the supporting part is provided with a guide inclined plane along the direction departing from the connecting rod so as to facilitate the installation of the clamping part;

the protruding rib is arranged on the inner side wall of the lock catch, and at least one mounting groove is formed in the protruding rib;

the limiting piece is arranged on the inner side wall of the lower surface of the inner cover and is rotatably overlapped on the convex rib after passing through the mounting groove;

the number of the mounting grooves is consistent with that of the limiting pieces.

2. The cover assembly of claim 1, further comprising:

the screens portion is T shape, includes:

the locking ring is connected to one end of the clamping portion, the other end of the clamping portion is connected with the protruding portion, the length of the protruding portion is larger than that of the clamping portion, the clamping portion is connected with the linkage groove in a clamped mode, and the protruding portion is right the lock catch is limited.

3. The cover assembly of claim 2, further comprising:

the both sides of joint portion are provided with first lateral wall, the second lateral wall of outwards buckling, first lateral wall with the second lateral wall respectively with the interlock groove joint.

4. The cover assembly of claim 3,

the first side wall and the second side wall are bent towards the central line direction of the clamping portion.

5. The cover assembly of claim 4, further comprising:

the outermost end of first lateral wall forms first inclined plane, the outermost end of second lateral wall forms the second inclined plane, first inclined plane with contained angle between the plane of joint portion is less than 90, the second inclined plane with contained angle between the plane of joint portion is less than 90.

6. The cover assembly of claim 1,

the locking ring and the clamping part are of an integrated structure.

7. The cover assembly of claim 6,

the lock catch forms the lock ring and the clamping part through punch forming.

8. A cooking appliance comprising a lid assembly as claimed in any one of claims 1 to 7.

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