CN111802909A

CN111802909A - Pressure cooker

Info

Publication number: CN111802909A
Application number: CN202010151607.5A
Authority: CN
Inventors: 王继伟
Original assignee: Instant Brands Inc
Current assignee: Instant Brands Inc
Priority date: 2019-04-10
Filing date: 2020-03-06
Publication date: 2020-10-23
Anticipated expiration: 2040-03-06
Also published as: CA3077687A1; CN111802909B

Abstract

The application provides a pressure cooker, including the pot body, pot cover subassembly and install in the subassembly is opened in ending of pot cover subassembly, the pot body includes the pot edge and certainly the pot tooth along the extension, the pot cover subassembly including the lid edge and certainly the lid tooth along the extension, the subassembly is opened including installing in end the slider and the float of opening in the pot cover subassembly, when cooking space does not have pressure, rotatory action of opening the lid can drive end the slider slides, under the pressure situation in the cooking space, end the float that opens and rise in order to prevent end the slider slides, thereby prevent the rotation of uncapping of pot cover subassembly, end the subassembly still including be connected to end the slider that locks of opening, uncap by force and lead to under the condition that end the slider warp, lock the slider with the cooperation of pot tooth is locked, in order to prevent the rotation of pot cover subassembly is uncapped, the safety of the pressure cooker is effectively guaranteed.

Description

Pressure cooker

Technical Field

The application relates to the field of small household appliances, in particular to a pressure cooker.

Background

The electric pressure cooker is a common household appliance. An opening-stopping sliding plate matching mechanism is arranged in the related electric pressure cooker. When pressure exists in the cooker body, the floater jumps up, the opening stopping sliding plate matching mechanism prevents the cover opening action of the cooker cover, the cooker cover cannot be opened, and the use safety of the electric pressure cooker is ensured. However, the opening stopping sliding plate is easy to deform when the cover is opened forcibly, and the antirust paint on the pot edge is peeled off, so that the opening stopping action is failed.

Disclosure of Invention

The application provides a safe pressure cooker uncaps.

The application provides a pressure cooker, fit including the pot body that has the culinary art space, lid the oral area of the pot body is used for sealing the pot lid subassembly of culinary art space and install in the subassembly of stopping opening of pot lid subassembly, the pot body is including being in pot body upper end is annular pot edge and certainly pot tooth that the pot edge extends, pot lid subassembly is established including the cover in the lid edge in the pot edge outside and certainly the lid tooth that the lid extends along, the subassembly of stopping opening is including installing in the slider of stopping opening and the float of stopping on the pot lid subassembly, when the culinary art space does not have pressure, rotatory action of uncapping can drive the slider of stopping opens slides, under the pressure situation in the culinary art space, the float of stopping rises in order to prevent the slider of stopping opens slides, thereby prevent the rotation of uncapping of pot lid subassembly, the subassembly of stopping still including being connected to the slider of stopping opening is locked, under the condition that forced uncovering causes deformation of the opening stopping sliding block, the locking sliding block is matched and locked with the pot teeth to prevent the pot cover assembly from being uncovered in a rotating mode.

Furthermore, the opening stopping assembly comprises an ejector rod connected to the opening stopping sliding block, the pot teeth comprise a main body part with an inclined outer side face, and the ejector rod drives the opening stopping sliding block to slide under the action of the outer side face in the process of rotating to open the cover.

Further, the pot teeth further comprise a stop block extending downwards from the main body part, the opening stopping assembly comprises a bolt rod connected to the locking slide block and lower than the ejector rod, and under the condition that the opening stopping slide block is deformed due to forced opening, the locking slide block is matched with the stop block through the bolt rod to prevent the opening from continuing.

Furthermore, the opening stopping assembly further comprises an elastic part, the opening stopping assembly keeps the trend of sliding towards the center of the pot cover assembly under the action of the elastic part, in the process of rotating to open the cover, the opening stopping sliding block slides towards the outer side of the pot cover assembly under the matching of the ejector rod and the outer side face of the pot teeth, and after the ejector rod slides over the outer side face of the pot teeth, the opening stopping sliding block slides towards the center of the pot cover assembly under the action of the elastic part.

Furthermore, the locking slide block is positioned at the rear side of the opening stopping slide block in the opening direction for a certain distance, and after the pot cover assembly rotates to the opening position, the bolt rod passes through the pot teeth for a certain distance, so that the pot cover assembly can be opened and closed without obstacles.

Furthermore, the pot teeth comprise accommodating parts, the opening stopping assembly comprises a bolt rod which is connected to the locking sliding block and can be matched with the outer side faces of the pot teeth, and under the condition that the opening stopping sliding block is deformed due to forced opening, the locking sliding block is matched with the pot teeth through the bolt rod in the accommodating parts to prevent the pot teeth from being opened continuously.

Furthermore, the distance between the ejector rod and the bolt rod and the width of the accommodating part are properly set, so that the bolt rod is matched with the pot teeth when the ejector rod slides to the position of the accommodating part in the normal cover opening and closing process.

Furthermore, the pot teeth comprise side edges which are encircled into the accommodating parts so as to enhance the strength of the pot teeth.

Further, the ejector rod comprises an ejector rod end part and a first assembly part, the ejector rod end part and the first assembly part are located on two opposite sides of the opening stopping sliding block, the ejector rod end part abuts against the pot teeth, and the elastic part comprises a first elastic part sleeved to the first assembly part.

Further, the bolt rod comprises a bolt rod end portion and a second assembly portion, the bolt rod end portion and the second assembly portion are located on two opposite sides of the locking sliding block, and the elastic piece comprises a second elastic piece sleeved to the second assembly portion.

Further, the pot cover assembly comprises a handle, the first elastic piece is located between the handle and the opening stopping sliding block, and the second elastic piece is located between the handle and the locking sliding block.

Furthermore, the opening stopping assembly comprises a connecting portion and a hole, the connecting portion is connected with the locking slider and the opening stopping slider, the hole is formed in the connecting portion, the connecting portion comprises a narrowed portion located at the middle position approximately, the opening stopping float rises to be matched with the hole to prevent the opening stopping slider from sliding, the hole is close to the locking slider, and when the narrowed portion is broken due to forced opening of the cover, the locking slider cannot be moved out of the accommodating portion.

Furthermore, the opening stopping assembly comprises a connecting part which is connected with the locking sliding block and the opening stopping sliding block, the connecting part has elasticity, the opening stopping floater rises and is matched with the hole to prevent the opening stopping sliding block from sliding, and when the cover is opened forcibly, the connecting part can be elastically deformed under stress to prevent the connecting part from being disconnected.

This application pressure cooker's division subassembly of ending is including ending the slider and being connected to the slider of locking of ending the slider even it takes place to warp the inefficacy back to end the slider, the slider of locking still can with pot tooth supports and holds, prevents the action of uncapping of pot lid subassembly has guaranteed effectively the security that pressure cooker used.

Drawings

Fig. 1 is a perspective view of a first embodiment of the pressure cooker of the present application.

Fig. 2 is an exploded view of the opening stop assembly of the pressure cooker of fig. 1.

Fig. 3 is a cross-sectional view of the lid assembly of the pressure cooker of fig. 1, showing the opening stop assembly.

Fig. 4 is a schematic view showing the top bar of the opening stop assembly shown in fig. 1 abutting against the pot teeth.

Fig. 5 is a schematic view showing the engagement of the stopper rod of the opening stop assembly shown in fig. 1 with the pot teeth.

Fig. 6 is a schematic view of the engagement of the stop assembly with the pot teeth of the second embodiment of the pressure cooker of the present application.

Fig. 7 is an enlarged view of the circled portion of the schematic shown in fig. 6.

Fig. 8 is a schematic view of the schematic view of fig. 6 in cross section along the circumferential direction of the pan rim, the view being a top plan view after the cross section.

FIG. 9 is a view similar to FIG. 8, but with the latch rod slid out of the receiver.

Fig. 10 is a view similar to fig. 8, wherein the locking slide is deformed and the pin is locked with the pot teeth.

Fig. 11 is a schematic view of the engagement of the stop assembly with the pot teeth of the third embodiment of the pressure cooker of the present application.

Fig. 12 is a schematic view of an opening stop assembly of a fourth embodiment of the pressure cooker of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the pressure cooker of the present application includes a cooker body 1 having a cooking space 10, and a cover assembly 2 covering a mouth 12 of the cooker body 1 to enclose the cooking space 10. The pot body 1 comprises a pot edge 13 which is annular at the upper end of the pot body and pot teeth 14 which protrude outwards from the pot edge 13. The pot teeth 14 include a body 140 and a stopper 141 extending downward from the body 140. The body portion 140 includes an inclined outer side surface 1400. The pot cover component is closed clockwise and opened anticlockwise according to the international standard.

The pot cover assembly 2 includes a lower cover 21, an opening stop assembly 22, and an opening stop float 23 and a handle 24 connected to the lower cover 21. The lower cover 21 includes a top portion 210, a cover rim 211 extending from the top portion 210, and a plurality of cover teeth 212 protruding from a bottom end of the cover rim 211 to an inner side thereof. The cover edge 211 is sleeved outside the pot edge 13. The top portion 210 includes a through hole 2100 through which the opening prevention float 23 passes. The cover rim 211 includes a first perforation 2110. The handle 24 includes a second through hole 240 corresponding to the first through hole 2110.

The opening stopping assembly 22 comprises an opening stopping slider 220, a locking slider 221, a connecting part 226 connected to the opening stopping slider 220 and the locking slider 221, a top rod 222 connected to the opening stopping slider 220, and a bolt 223 connected to the locking slider 221. The position of the latch 223 is lower than that of the jack 222. When the cooking space 10 is not pressurized, in the process of rotating to open the lid, the ejector rod 222 drives the opening stop slider 221 to slide under the action of the outer side 1400, and under the condition of pressure in the cooking space 10, the opening stop float 23 rises to prevent the opening stop slider 220 from sliding, so that the lid opening rotation of the pot lid assembly 2 is prevented. The locking slide block 221 is located at a certain distance behind the opening stopping slide block 220 in the opening direction, and after the pot cover assembly 2 rotates to the opening position, the bolt rod 223 crosses the pot teeth 14 for a certain distance, so that the pot cover assembly 2 can be opened and closed without obstacles.

The opening stopping assembly 22 further comprises an elastic member, the opening stopping assembly 22 keeps a tendency of sliding towards the center of the pot cover assembly 2 under the action of the elastic member, in the process of rotating to open the cover, the opening stopping slider 220 slides towards the outer side of the pot cover assembly 2 under the matching of the push rod 222 and the outer side surface 1400 of the main body part 140 of the pot teeth 14, and after the push rod 222 slides over the outer side surface 1400 of the main body part 140 of the pot teeth 14, the opening stopping slider 220 slides towards the center of the pot cover assembly 2 under the action of the elastic member. The locking slide block 221 is located at a certain distance behind the opening direction of the opening stop slide block 220, and after the pot cover assembly 2 rotates to the opening position, the bolt rod 223 crosses the pot teeth 14 for a certain distance, so that the pot cover assembly 2 can be opened and closed without obstacles.

The elastic member includes a first elastic member 224 sleeved on the top bar 222 and a second elastic member 225 sleeved on the bolt 223. The post 222 passes through the first through hole 2110 of the cover rim 211 and the second through hole 240 of the handle 24. The first elastic member 224 is located between the handle 24 and the opening stop slider 220. The second elastic member 225 is located between the handle 24 and the locking slider 221. The opening stopping slider 220 moves and presses the first elastic member 224, and the elastic force of the first elastic member 224 abuts against the opening stopping slider 220 to reset. The locking slider 221 moves and presses the second elastic member 225, and the elastic force of the second elastic member 225 pushes the locking slider 221 to reset. In the vertical direction, the position of the latch 223 is lower than the position of the jack 222. The latch 223 is equidistant from the center of the top bar 222 to the cover rim 211.

In the illustrated embodiment, when the opening stop slider 220 abuts against the pot teeth 14, the opening stop slider 220 is located between the locking slider 221 and the pot teeth 14. When the pot teeth 14 are offset from the cover teeth 212, the pot teeth 14 are slightly shorter than the pot teeth 14 of the prior art in order to prevent the pin 223 from abutting against the pot teeth 14.

In the illustrated embodiment, the stem bar 222 is assembled to the open-stop slider 220, and the open-stop slider 220 includes a through hole 2200 for the stem bar 222 to pass through. The stem 222 may also be integrally formed with the open-stop slider 220. The connection relationship between the bolt 223 and the locking slider 221 refers to the connection relationship between the plunger 222 and the opening stop slider 220, and is not described in detail herein.

The stem 222 includes a stem end portion 2220 and a first assembling portion 2221 located at opposite sides of the open-stop slider 220. The first elastic element 224 is sleeved on the first assembling portion 2221. The surface of the top bar end 2220 corresponding to the pot teeth 14 is a smooth surface, so that the top bar end 2220 can slide along the pot teeth 14. The latch bar 223 includes a latch bar end 2230 and a second assembly 2231 on opposite sides of the deadlocking slider 221. The second elastic member 225 is sleeved on the second assembly portion 2231. The peg end 2230 may be any shape.

The open-stop slider 220 includes a hole 2201 corresponding to the through hole 2100. When high pressure is formed in the cooking space, the opening stopping float 23 is jacked up to pass through the hole 2201 of the opening stopping slider 220, the opening stopping slider 220 is limited from moving, the end portion 2220 of the jacking rod 222 cannot slide along the pot teeth 14, so that the jacking rod 222 abuts against the pot teeth 14, the rotation of the pot cover assembly 2 is prevented, the pot cover assembly 2 cannot be opened due to the abutting of the pot teeth 14 and the cover teeth 212 in the vertical direction, and the use safety of the pressure cooker is effectively ensured.

Referring to fig. 5, in case that the forcible opening causes the deformation of the opening prevention slider 220, the latch 223 coupled to the locking slider abuts against the stopper 141 to prevent the rotation of the lid assembly 2, and the lid assembly 2 cannot be opened.

When the cooker cover assembly 2 needs to be opened, the pressure relief operation is performed, when no pressure exists in the cooking space 10, the opening stopping floater 23 moves downwards under the influence of gravity to be separated from the opening stopping slider 220, at this time, along with the rotation of the cooker cover assembly 2, because the opening stopping slider 220 is separated from the stopping of the opening stopping floater 23, the ejector rod 222 can move along the cooker teeth 14 and drive the opening stopping slider 220 and the locking slider 221 to move outwards, so that the locking slider 221 is staggered with the stop block 141 of the cooker teeth 14, and the cooker cover assembly 2 can smoothly rotate to open the cover.

When high pressure is formed in the cooking space, the opening stopping floater 23 is jacked up to penetrate through the hole 2201 of the opening stopping slider 220, the opening stopping slider 220 is limited and cannot move, the jacking rod 222 abuts against the pot teeth 14 to prevent the pot cover assembly 2 from rotating, the pot cover assembly 2 cannot rotate and open, and the use safety of the pressure cooker is effectively guaranteed.

Referring to fig. 6 to 9, in the second embodiment, the pot teeth 14 include receiving portions 142 and side edges 143 enclosing the receiving portions 142. The width of the receiving portion 142 and the distance between the top bar 222 and the bolt 223 are set appropriately, so that the bolt 223 slides out of the receiving portion 142 when the top bar 222 slides to match with the outer side surface 1400 of the pot teeth 14 in the normal cover opening and closing process (the arrow direction is the cover opening direction). The width of the receiving portion 142 and the distance between the top bar 222 and the bolt 223 are set appropriately, so that when the top bar 222 slides to the position of the receiving portion 142 during normal cover opening and closing process, the bolt 223 is guided and matched with the outer side 1400 of the pot teeth 14, so that the opening stop assembly 22 can smoothly slide over the pot teeth 14.

In the illustrated embodiment, the receiving portion 142 is a recess, but the present invention is not limited thereto. The receiving portion 142 may also be an aperture.

The side edges 143 reinforce the strength of the pot tooth 14. When the opening stop float 23 is pushed up, the bolt 223 is located in the receiving portion 142 and abuts against the pot teeth 14. Referring to fig. 10, even if the top bar 222 cannot abut against the pot teeth 14 due to the deformation of the opening stop slider 220, the lid assembly 2 cannot rotate and cannot complete the opening operation due to the abutment of the bolt 223 against the pot teeth 14. After the pressure cooker is depressurized, the cooker cover assembly 2 is rotated, the prop 222 moves along the cooker teeth 14 and drives the opening stop slider 220 and the locking slider 221 to move outward, so that the locking slider 221 moves out of the accommodating portion 142, and the cooker cover assembly 2 can smoothly rotate to open the cover.

Referring to fig. 11, in the third embodiment, compared to the first embodiment, the connecting portion 226 includes a narrowed portion 2261 located approximately in the middle, the hole 2201 is disposed near the locking slider 221, when the narrowed portion 2261 is disconnected due to forcible opening, the locking slider 221 is disconnected from the opening-stopping slider 220, and the locking slider 221 cannot be removed from the receiving portion 142 due to no guiding function between the locking slider 221 and the pot teeth 14, thereby effectively ensuring the safety of opening the lid.

Referring to fig. 12, in the fourth embodiment, compared with the third embodiment, the connection portion 226 has elasticity, and when the lid is opened forcibly, the connection portion 226 is prevented from being broken, and the situation that the lid assembly 2 cannot be opened completely after the connection portion 226 is broken is prevented. The connecting portion 226 is connected to the ends of the opening stop slider 220 and the locking slider 221. The connecting portion 226, the opening stop slider 220, and the locking slider 221 may be fixed by welding or riveting. The connection portion 226 includes a first connection portion 2260 connected to the locking slider 221, a second connection portion 2262 connected to the opening prevention slider 220, and a third connection portion 2263 connecting the first connection portion 2260 and the second connection portion 2262. The first connecting portion 2260 covers an upper surface (not labeled) and a lateral surface (not labeled) of the locking slider 221, and the upper surface and the lateral surface are perpendicular. The second connecting portion 2262 covers an upper surface (not labeled) and a lateral surface (not labeled) of the open-stop slider 220, and the upper surface is perpendicular to the lateral surface. The third connecting portion 2263 is substantially circular and extends from the first connecting portion 2260 and the second connecting portion 2262 in a direction away from the anti-opening slider 220 and the locking slider 221. The third connecting portion 2263 is provided with an opening 2264. The opening 2264 faces the gap between the opening stop slider 220 and the locking slider 221. The third connecting portion 2263 has better elasticity, which can effectively prevent the connecting portion 226 from being broken by a force.

The subassembly 22 of stopping opening of this application pressure cooker is including stopping opening slider 220 and being connected to the slider 221 of stopping locking of slider 220, even if stop opening slider 220 and take place to warp behind the inefficacy, the slider 221 of locking still can with pot tooth 14 supports, prevents the action of uncapping of pot cover subassembly 2 has guaranteed effectively the security that pressure cooker used.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A pressure cooker comprises a cooker body with a cooking space, a cooker cover assembly and an opening stopping assembly, wherein the cooker cover assembly covers the opening of the cooker body and is used for closing the cooking space, the opening stopping assembly is mounted on the cooker cover assembly, the cooker body comprises a cooker edge which is positioned at the upper end of the cooker body and is annular, cooker teeth extend from the cooker edge, the cooker cover assembly comprises a cover edge which is sleeved on the outer side of the cooker edge and cover teeth extend from the cover edge, the opening stopping assembly comprises an opening stopping slide block and an opening stopping float, when the cooking space is not pressurized, the opening stopping slide block can be driven to slide by the action of rotating an opening cover, and under the condition that the pressure is in the cooking space, the opening stopping float block rises to prevent the opening stopping slide block from sliding, so that the opening cover of the cooker cover assembly is prevented from rotating, and the opening stopping assembly further comprises a locking slide block connected to the opening stopping slide block, under the condition that forced uncovering causes deformation of the opening stopping sliding block, the locking sliding block is matched and locked with the pot teeth to prevent the pot cover assembly from being uncovered in a rotating mode.

2. The pressure cooker of claim 1, wherein said opening stop assembly includes a plunger coupled to said opening stop slider, said pot teeth include a main body portion having an inclined outer side surface, said plunger being adapted to slide said opening stop slider under the action of said outer side surface during the cover opening rotation.

3. The pressure cooker of claim 2, wherein said teeth further comprise a stop extending downwardly from said body portion, and said opening stop assembly comprises a pin connected to said blocking slider and lower than said plunger, whereby said blocking slider engages said stop to prevent further opening of said lid in the event of deformation of said opening stop caused by forcible opening of said lid.

4. The pressure cooker as claimed in claim 3, wherein the opening stopping assembly further comprises an elastic member, the opening stopping assembly maintains a tendency to slide toward the center of the lid assembly by the elastic member, the opening stopping slider slides toward the outer side of the lid assembly by the engagement of the push rod with the outer side of the teeth during the rotation of the lid, and the opening stopping slider slides toward the center of the lid assembly by the elastic member after the push rod slides over the outer side of the teeth.

5. The pressure cooker as claimed in claim 4, wherein the locking slider is located at a distance behind the opening prevention slider in the opening direction, and the latch bar passes over the teeth a distance after the lid assembly is rotated to the opening position, so that the lid assembly can be opened and closed without hindrance.

6. The pressure cooker of claim 2, wherein said tooth includes a receiving portion, said opening stop assembly includes a latch rod connected to said blocking slide and engageable with an outer side surface of said tooth, said blocking slide engaging said tooth through said latch rod in said receiving portion to prevent further opening of said cover in the event of deformation of said opening stop slide by forced opening of said cover.

7. The pressure cooker as claimed in claim 6, wherein the distance between the push rod and the bolt is set to be appropriate for the width of the receiving portion, so that the bolt is engaged with the cooker teeth when the push rod slides to the position of the receiving portion during normal cover opening and closing.

8. The pressure cooker of claim 6, wherein said pot teeth include sides that enclose said receiving portion to increase the strength of said pot teeth.

9. The pressure cooker of claim 4, wherein the push rod includes a push rod end portion and a first assembly portion located at opposite sides of the opening stop slider, the push rod end portion abuts against the cooker teeth, and the elastic member includes a first elastic member sleeved to the first assembly portion.

10. The pressure cooker of claim 9, wherein said latch rod includes a latch rod end and a second assembly portion located on opposite sides of said deadlocking slider, and said resilient member includes a second resilient member sleeved to said second assembly portion.

11. The pressure cooker of claim 6, wherein said lid assembly includes a handle, said first resilient member being located between said handle and said opening stop slider, said second resilient member being located between said handle and said locking slider.

12. The pressure cooker of claim 6, wherein said opening stop assembly includes a connecting portion connecting said locking slider and said opening stop slider, and a hole provided in said connecting portion, said connecting portion including a narrowed portion located approximately at a middle position, said opening stop float rising to cooperate with said hole to prevent said opening stop slider from sliding, said hole being located close to said locking slider, said locking slider being unable to be removed from said receiving portion when said narrowed portion is broken by forcibly opening the lid.

13. The pressure cooker as claimed in claim 6, wherein the opening stop assembly includes a connecting portion connecting the locking slider and the opening stop slider, the connecting portion has elasticity, the opening stop float rises to cooperate with the hole to prevent the opening stop slider from sliding, and when the cover is opened forcibly, the connecting portion is elastically deformed by a force to prevent the connecting portion from being broken.