CN213786696U - Shell structure and lunch box - Google Patents

Abstract

The utility model relates to a shell structure and lunch-box. The shell structure comprises a shell and an air exhaust assembly, wherein an exhaust chamber is arranged outside the shell, and an air passage is formed between the exhaust chamber and an inner cavity of the shell; the air exhaust assembly comprises a first sealing valve core and a second sealing valve core, and the first sealing valve core can be arranged in the exhaust cavity in an up-and-down sliding manner; when the first sealing valve core moves upwards, the second sealing valve core opens the air leakage channel, and the exhaust cavity is in clearance fit with the first sealing valve core and then in interference fit with the first sealing valve core; when the first sealing valve core moves downwards, the second sealing valve core closes the air outlet channel, and the exhaust cavity is in clearance fit with the first sealing valve core after interference fit. This shell structure opens or closes the passageway of walking by between exhaust chamber and the casing inner chamber through the upper and lower motion of first sealed case in the exhaust chamber and through the sealed case of second, can carry out the evacuation to the casing, can keep fresh the processing to the food in the casing, avoids food rotten, improves user experience.

Description

Shell structure and lunch box

Technical Field

The utility model relates to the technical field of electrical apparatus, especially, relate to a shell structure and lunch-box.

Background

An electric heating lunch box is a living electric appliance which heats food in the lunch box by using steam generated by heating of a heating body. However, for the users who go to work or play outside, the food needs to be stored in the lunch box in advance, which easily causes the food to be stale or even go bad.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses to current lunch-box easily leads to food not fresh or even rotten problem, provide a shell structure and lunch-box, can take out the air in the lunch-box in order to guarantee that the food in the lunch-box is fresh.

A shell structure comprising: the air exhaust device comprises a shell and an air exhaust assembly, wherein an air exhaust chamber is arranged outside the shell, and an air passage is formed between the air exhaust chamber and an inner cavity of the shell;

the air extraction assembly comprises: the first sealing valve core and the second sealing valve core are arranged in the exhaust chamber in an up-and-down sliding manner;

when the first sealing valve core moves upwards, the second sealing valve core opens the air leakage channel, and the exhaust cavity and the first sealing valve core are in clearance fit and then in interference fit; when the first sealing valve core moves downwards, the second sealing valve core closes the air channel, and the exhaust cavity is in clearance fit with the first sealing valve core after interference fit.

In one embodiment, the number of the exhaust chambers and the air exhaust assemblies is 2, the exhaust chambers are symmetrically arranged on two sides of a central axis of the housing, the first sealing valve core is arranged in the corresponding exhaust chamber, and the second sealing valve core is used for opening or closing an air passage between the corresponding exhaust chamber and an inner cavity of the housing.

In one embodiment, the housing structure further comprises: and each end part of the lifting handle is connected with the corresponding first sealing valve core.

In one embodiment, the air outlet channel is arranged at the bottom of the exhaust chamber;

the inner diameter of the upper end of the exhaust cavity is smaller than that of the lower end of the exhaust cavity, and the outer diameter of the first sealing valve core is larger than the inner diameter of the upper end of the exhaust cavity and smaller than the inner diameter of the lower end of the exhaust cavity.

In one embodiment, the inner diameter of the exhaust chamber is gradually increased along the direction from top to bottom.

In one embodiment, the first seal cartridge comprises: the valve core comprises a valve core main body and a first sealing element arranged on the side wall of the valve core main body;

the first seal is for sealing a gap between the valve cartridge body and a wall of the vent chamber.

In one embodiment, the second sealing valve core can slide along the air leakage channel;

the port of the second sealing valve core, which is far away from the shell, is closed, the port of the second sealing valve core, which is far away from the exhaust chamber, is communicated with the inner cavity of the shell, and a vent hole is formed in the side wall of the second sealing valve core and can be exposed in the exhaust chamber to open the air leakage channel.

In one embodiment, the second sealing valve core is provided with a first bulge or/and a second bulge;

the first bulge is used for limiting the distance of the second sealing valve core moving along the direction from the exhaust cavity to the shell and blocking the air channel;

the second bulge is used for limiting the distance of the second sealing valve core moving along the direction from the shell to the exhaust chamber and blocking the air leakage channel.

A lunchbox, comprising: a storage box and the shell structure of any one of the above items;

the upper end opening of storing box, the storing box is arranged in shell structure's casing.

In one embodiment, the lunch box further comprises a heating body arranged at the bottom of the storage box.

According to the shell structure and the lunch box, the air passing channel between the exhaust cavity and the inner cavity of the shell is opened or closed through the up-and-down movement of the first sealing valve core in the exhaust cavity and the second sealing valve core, the shell can be vacuumized, and then food in the shell can be subjected to fresh-keeping treatment, so that the food is prevented from deteriorating, and the user experience is improved.

Drawings

Fig. 1 is an exploded schematic view of a lunch box according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing body according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a lunch box according to an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3 at A;

fig. 5 is a schematic structural diagram of a second sealing valve element according to an embodiment of the present invention.

Wherein the reference numerals in the drawings are as follows:

100. a housing; 100a, an exhaust chamber; 100b, a gas passage; 110. a base; 120. a top cover; 130. a housing main body; 141. a second seal member; 142. a third seal member; 200. a first seal spool; 210. a valve core main body; 220. a first seal member; 300. a second sealing spool; 300a, a vent hole; 310. a first boss portion; 320. a second boss portion; 400. a handle; 500. a storage box; 600. a heating element.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, an embodiment of the present invention provides a housing structure, which includes: as shown in fig. 2 and 3, the housing 100 and the pumping assembly are provided with an exhaust chamber 100a outside the housing 100, and an air passage 100b is provided between the exhaust chamber 100a and an inner cavity of the housing 100; the air extraction assembly comprises: a first sealing spool 200 and a second sealing spool 300, the first sealing spool 200 being slidably disposed up and down in the exhaust chamber 100 a; when the first sealing valve core 200 moves upwards, the second sealing valve core 300 opens the air leakage channel 100b, and the exhaust cavity 100a and the first sealing valve core 200 are in clearance fit and then in interference fit; when the first sealing valve core 200 moves downward, the second sealing valve core 300 closes the air leakage passage 100b, and the exhaust chamber 100a and the first sealing valve core 200 are in interference fit and then in clearance fit.

Note that when the vent chamber 100a is in interference fit with the first sealing spool 200, there is no gap between the first sealing spool 200 and the walls of the vent chamber 100 a; when the vent chamber 100a is clearance fitted with the first sealing spool 200, there is a clearance between the first sealing spool 200 and the wall of the vent chamber 100 a.

As an example, the housing structure may be used as a housing of a lunch box (e.g., an electric heating lunch box), and food may be stored in an inner cavity of the housing 100 of the housing structure through a storage box 500 (see fig. 1 and 3) having an opening at an upper end thereof.

The following describes how the shell 100 of the shell structure is evacuated:

when the first sealing valve core 200 moves upwards and the first sealing valve core 200 is in interference fit with the exhaust chamber 100a, the air pressure in the exhaust chamber 100a is continuously reduced along with the upward movement of the first sealing valve core 200, at this time, the second sealing valve core 300 opens the air passage 100b between the exhaust chamber 100a and the inner cavity of the housing 100, and the air in the inner cavity of the housing 100 flows into the exhaust chamber 100a through the air passage 100 b.

When the first sealing valve core 200 is in clearance fit with the exhaust chamber 100a, the gas in the exhaust chamber 100a flows out to the outside of the housing structure through the clearance between the first sealing valve core 200 and the exhaust chamber 100a, and at this time, the second sealing valve core 300 closes the gas passage 100b between the exhaust chamber 100a and the inner cavity of the housing 100, so that the gas in the exhaust chamber 100a does not flow into the inner cavity of the housing 100 through the gas passage 100 b.

The first sealing valve element 200 is moved up and down repeatedly, and the air pressure in the inner cavity of the housing 100 is gradually reduced until a vacuum effect is achieved.

The housing structure can be applied to a lunch box, the housing 100 can be vacuumized by the up-and-down movement of the first sealing valve core 200 in the exhaust chamber 100a and the opening or closing of the air passage 100b between the exhaust chamber 100a and the inner cavity of the housing 100 through the second sealing valve core 300, and then the food in the housing 100 can be preserved, so that the food is prevented from going bad, and the user experience is improved.

As shown in fig. 1 to 3, in some embodiments of the present invention, the number of the exhaust chambers 100a and the air exhaust assemblies is 2, the exhaust chambers 100a are symmetrically disposed on two sides of the central axis of the housing 100, the first sealing valve core 200 is disposed in the corresponding exhaust chamber 100a, and the second sealing valve core 300 is used to open or close the air passage 100b between the corresponding exhaust chamber 100a and the inner cavity of the housing 100. Therefore, the inner cavity of the shell 100 can be vacuumized quickly, and user experience is improved. Of course, in other embodiments of the present invention, the number of the exhaust chambers 100a and the exhaust assemblies may be greater than 2, such as 3, 4, 5, etc.

Further, as shown in fig. 1 and 3, in some embodiments of the present invention, the housing structure further includes: an arcuate handle 400, each end of the handle 400 being connected to a corresponding first seal cartridge 200. The first sealing valve core 200 can move up and down through the handle 400, so that the inner cavity of the shell 100 can be vacuumized quickly, the labor intensity can be reduced, the user experience is improved, and the shell structure can be carried conveniently. It will be appreciated that the vent chamber 100a has an opening at the top, as shown in fig. 1 and 3, through which the end of the handle 400 is connected to the first sealing spool 200 in the vent chamber 100 a.

Optionally, the handle 400 is an inverted U-shaped structure as shown in fig. 1 and 3. Wherein, the two end parts of the handle 400 are cylindrical, and the middle part of the handle 400 is flat.

Optionally, the two ends of the handle 400 are each connected to a corresponding first sealing spool 200 by screws. Specifically, as shown in fig. 4, the first sealing valve core 200 has a through hole, a threaded hole is provided on the end of the handle 400, and a screw of a screw passes through the through hole of the first sealing valve core 200 and is in threaded connection with the screw hole on the end of the handle 400. Of course, in other embodiments of the present invention, each end of the handle 400 may be connected to the corresponding first sealing valve core 200 by welding or bonding.

As shown in fig. 2, in some embodiments of the present invention, the air passage 100b is opened at the bottom of the exhaust chamber 100 a; the upper end inner diameter of the exhaust chamber 100a is smaller than the lower end inner diameter, and the outer diameter of the first seal spool 200 is larger than the upper end inner diameter of the exhaust chamber 100a and smaller than the lower end inner diameter of the exhaust chamber 100 a. The inner diameter of the upper end of the exhaust chamber 100a is the diameter of the circumscribed circle of the inner wall of the upper end cross section of the exhaust chamber 100a, and the inner diameter of the lower end of the exhaust chamber 100a is the diameter of the circumscribed circle of the inner wall of the lower end cross section of the exhaust chamber 100 a. The effective working space of the exhaust chamber 100a can be increased by opening the air passage 100b at the bottom of the exhaust chamber 100 a.

In particular, in some embodiments of the present invention, as shown in fig. 3, the inner diameter of the exhaust chamber 100a gradually increases in a direction from top to bottom. This type of construction of the exhaust chamber 100a facilitates processing.

As shown in fig. 1 and 4, in some embodiments of the present invention, the first sealing spool 200 includes: a cartridge body 210 and a first seal 220 disposed on a sidewall of the cartridge body 210; a first seal 220 for a gap between the spool body 210 and the wall of the exhaust chamber 100 a; thus, the air leakage of the exhaust chamber 100a can be prevented during the process of pulling the handle 400 upward.

Optionally, the first seal 220 is a rubber seal. The cartridge body 210 has an annular groove on a sidewall thereof, and the first sealing member 220 may be adhered to the annular groove by glue. With respect to the number of the first sealing members 220, the embodiments of the present invention are not particularly limited as long as the gap between the valve body 210 and the exhaust chamber 100a can be effectively maintained, for example, 1 sealing member is shown in fig. 4.

In some embodiments of the present invention, the second sealing spool 300 can slide along the gas passage 100 b; as shown in fig. 4 and 5, the port of the second sealing valve 300 far from the housing 100 is closed, the port of the second sealing valve 300 far from the exhaust chamber 100a communicates with the inner cavity of the housing 100, and a vent hole 300a is formed in the side wall of the second sealing valve 300, and the vent hole 300a can be exposed to the exhaust chamber 100a to open the air escape passage 100 b. It is understood that when the vent hole 300a is not exposed to the exhaust chamber 100a, i.e. located in the air passage 100b or exposed to the inner cavity of the casing 100, the exhaust chamber 100a is not communicated with the inner cavity of the casing 100, which is equivalent to the air passage 100b being in a closed state.

When the first sealing valve core 200 moves upwards to be in interference fit with the exhaust chamber 100a, the air pressure in the exhaust chamber 100a is continuously reduced along with the upward movement of the first sealing valve core 200, in the process, the second sealing valve core 300 slides in the air leakage passage 100b along the direction from the housing 100 to the exhaust chamber 100a, and when the vent hole 300a on the second sealing valve core 300 is exposed in the exhaust chamber 100a, the air leakage passage 100b is in an open state. When the first sealing valve element 200 moves downward to be in interference fit with the exhaust chamber 100a, the air pressure in the exhaust chamber 100a continuously increases along with the downward movement of the first sealing valve element 200, in the process, the second sealing valve element 300 slides in the air passage 100b along the direction from the exhaust chamber 100a to the housing 100, when the vent hole 300a on the second sealing valve element 300 enters the air passage 100b or the inner cavity of the housing 100, the air passage 100b is adjusted from the open state to the closed state, then the first sealing valve element 200 continues to move downward to be in clearance fit with the exhaust chamber 100a, and the air in the exhaust chamber 100a is exhausted to the outside of the housing structure only through the clearance between the first sealing valve element 200 and the exhaust chamber 100 a.

Optionally, the profile of the second sealing valve 300 is adapted to the structure of the ventilation channel 100 b. For example, fig. 2 shows the ventilation channel 100b as a circular hole structure, and the second sealing valve core 300 is a cylindrical structure with an inner cavity.

Alternatively, the vent holes 300a are round holes, square holes, or other irregularly shaped holes. With respect to the number of the vent holes 300a, the embodiment of the present invention is not particularly limited as long as effective ventilation is possible, and for example, 1 vent hole or 2 vent holes are provided uniformly along the circumferential direction of the second sealing valve member 300.

Further, in some embodiments of the present invention, as shown in fig. 4 and 5, the second sealing valve core 300 is provided with a first protrusion 310 or/and a second protrusion 320; the first projection 310 is used for limiting the distance of the second seal spool 300 moving in the direction from the exhaust chamber 100a to the housing 100 and for blocking the air escape passage 100 b; the second projection 320 is used to limit the distance that the second seal spool 300 moves in the direction from the housing 100 to the exhaust chamber 100a and to block the gas escape passage 100 b. The first protruding portion 310 can prevent the second sealing valve element 300 from falling into the inner cavity of the housing 100 during the movement in the direction from the exhaust chamber 100a to the housing 100, and can block the air vent channel 100b when the first protruding portion 310 abuts against the port of the second sealing valve element 300 far away from the housing 100; the second protrusion 320 can prevent the second seal from dropping into the exhaust chamber 100a during the movement from the housing 100 to the exhaust chamber 100a, and can block the air leakage passage 100b when the second protrusion 320 abuts against the port of the second seal spool 300 far from the exhaust chamber 100 a.

Alternatively, as shown in fig. 5, the first raised portion 310 is a stop ring disposed at a port of the second seal spool 300 that is distal from the internal cavity of the housing 100, and the second raised portion 320 is a stop ring disposed at a port of the second seal spool 300 that is distal from the vent chamber 100 a. The first and second protrusions 310 and 320 may be integrally formed with the second sealing valve element 300. The first protrusion 310, the second protrusion 320 and the second sealing valve element 300 are made of the same material, such as rubber. It should be noted that the second sealing valve element 300 made of rubber can deform under a preset pressure, which is convenient for the second sealing valve element 300 to be assembled and disassembled, and when the casing 100 is vacuumized, neither the air pressure of the exhaust chamber 100a nor the air pressure of the inner cavity of the casing 100 can cause the second sealing valve element 300 to deform.

Of course, in some embodiments of the present invention, the second sealing valve core 300 may also be a gas baffle hinged to the inner wall of the exhaust chamber 100 a; when the first sealing valve core 200 moves upwards, the air baffle can rotate along the preset direction to open the air outlet channel 100 b; when the first sealing spool 200 moves downward, the air blocking plate can be reset in a direction opposite to the preset direction to close the air escape passage 100 b.

Another embodiment of the present invention provides a lunch box, as shown in fig. 1 and 3, the lunch box includes: a storage case 500 and the housing structure of any of the above; the upper end of the storage box 500 is opened, and the storage box 500 is placed in the housing 100 of the housing structure.

According to the lunch box, the first sealing valve core 200 moves up and down in the exhaust cavity 100a and the second sealing valve core 300 opens or closes the air passage 100b between the exhaust cavity 100a and the inner cavity of the casing 100, so that the casing 100 can be vacuumized, food in the casing 100 can be preserved, the food is prevented from going bad, and user experience is improved.

As shown in fig. 1 and 3, in some embodiments of the present invention, the lunch box further includes a heating element 600 disposed at the bottom of the storage box 500. The heat-generating body 600 can be used to heat the food in the storing box 500, increases the function of lunch-box, and then can improve user experience.

Alternatively, the heat generating body 600 is a PTC (Positive Temperature Coefficient semiconductor) heat generating body.

Alternatively, as shown in fig. 1 and 3, the housing 100 includes: a base 110, a top cover 120, and a housing body 130; the lower end of the housing main body 130 is seated in the base 110; the top cover 120 is fitted over the upper port of the housing body 130; an exhaust chamber 100a is provided on an outer wall of an upper end of the housing main body 130; the storage box 500 is placed in the cavity between the housing body 130 and the top cover 120; the heat generating body 600 is disposed between the base 110 and the bottom of the case main body 130 and aligned with the heating port of the bottom of the case main body 130. Wherein a second sealing member 141 (e.g., a rubber packing) shown in fig. 1 is provided between the heating port and the heating element 600; a third seal 142 (e.g., a rubber seal) shown in fig. 4 is disposed between the top cover 120 and the upper port of the body.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A shell structure, comprising: the air exhaust device comprises a shell and an air exhaust assembly, wherein an air exhaust chamber is arranged outside the shell, and an air passage is formed between the air exhaust chamber and an inner cavity of the shell;

the air extraction assembly comprises: the first sealing valve core and the second sealing valve core are arranged in the exhaust chamber in an up-and-down sliding manner;

when the first sealing valve core moves upwards, the second sealing valve core opens the air leakage channel, and the exhaust cavity and the first sealing valve core are in clearance fit and then in interference fit; when the first sealing valve core moves downwards, the second sealing valve core closes the air channel, and the exhaust cavity is in clearance fit with the first sealing valve core after interference fit.

2. The shell structure of claim 1, wherein the number of the exhaust chambers and the air pumping assemblies is 2, the exhaust chambers are symmetrically arranged on two sides of a central axis of the shell, the first sealing valve core is arranged in the corresponding exhaust chamber, and the second sealing valve core is used for opening or closing an air passage between the corresponding exhaust chamber and an inner cavity of the shell.

3. The housing structure of claim 2, further comprising: and each end part of the lifting handle is connected with the corresponding first sealing valve core.

4. The shell structure of any one of claims 1 to 3, wherein the air passage opens at the bottom of the air discharge chamber;

the inner diameter of the upper end of the exhaust cavity is smaller than that of the lower end of the exhaust cavity, and the outer diameter of the first sealing valve core is larger than the inner diameter of the upper end of the exhaust cavity and smaller than the inner diameter of the lower end of the exhaust cavity.

5. The housing structure according to claim 4, wherein the inner diameter of the exhaust chamber is gradually increased in a direction from top to bottom.

6. The housing structure of any of claims 1-3, wherein the first seal cartridge comprises: the valve core comprises a valve core main body and a first sealing element arranged on the side wall of the valve core main body;

the first seal is for sealing a gap between the valve cartridge body and a wall of the vent chamber.

7. The housing structure according to any one of claims 1 to 3, wherein the second seal spool is slidable along the gas escape passage;

the port of the second sealing valve core, which is far away from the shell, is closed, the port of the second sealing valve core, which is far away from the exhaust chamber, is communicated with the inner cavity of the shell, and a vent hole is formed in the side wall of the second sealing valve core and can be exposed in the exhaust chamber to open the air leakage channel.

8. The housing structure according to claim 7, characterized in that the second sealing spool is provided with a first projection or/and a second projection;

the first bulge is used for limiting the distance of the second sealing valve core moving along the direction from the exhaust cavity to the shell and blocking the air channel;

the second bulge is used for limiting the distance of the second sealing valve core moving along the direction from the shell to the exhaust chamber and blocking the air leakage channel.

9. A lunchbox, comprising: a storage case and the housing structure of any one of claims 1-8;

the upper end opening of storing box, the storing box is arranged in shell structure's casing.

10. The lunch box according to claim 9, further comprising a heating element disposed at a bottom of the storage box.

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