Automatic Vent Food Container

Abstract

To provide an automatic exhaust type food container that realizes a function of exhausting air and relieving pressure. [Solution] The lunch box includes a box body 1 and a removably connected lid body 2, with a lid sidewall 3 molded at the bottom end of the lid body, and a box sidewall that contacts the lid sidewall molded at the top opening of the box body. A gap is provided between the box sidewall and the lid sidewall, allowing gas to pass through. An annular sealing strip 6 is provided on the outer wall of the lid sidewall to seal the gap. The annular sealing strip includes a first sealing strip 6a located on both the left and right sides of the lid sidewall and a second sealing strip 6b located on both the front and back sides of the lid sidewall, with the second sealing strip positioned higher horizontally than the first sealing strip. When the lunch box is heated in a microwave oven, the air pressure inside the box becomes higher than the air pressure outside the box, causing the lid body to be pushed and continuously moved upward along the box sidewall via the annular sealing strip.

Description

[Technical Field]

[0001] The present invention relates to the technical field of food containers, especially to self-venting food containers. [Background technology]

[0002] When placing an existing lunch box in a microwave, the lunch box is sealed, so to prevent it from exploding, the lid of the lunch box must be opened slightly to let out the air and prevent the explosion, which is quite inconvenient.

[0003] Therefore, an environmentally friendly, heat-resistant lunch box with ventilation grooves has been designed, as shown in Chinese Utility Model Patent No. CN201820924468.3. This lunch box includes a box body, a hanging piece connected to the upper end of the outer wall of the box body, a buckle hole connected to the lower end of the hanging piece, a box lid that fits the box body, and a buckle cover that is hinged to the lower end of the box lid and fits the buckle hole. By adding structures such as a horizontal plate, a squeezing rod, and an upper rod, when the horizontal plate is inserted into the strip groove, it moves upward and compresses the squeezing rods on both sides. The upper rod moves upward by disengaging from the bottom of the arc groove and abutting the upper end of the squeezing rod, driving the sealing plug to disengage from the sealing ring, penetrating the first vent hole, the mounting cavity, and the second vent hole, thereby achieving the ventilation effect.

[0004] This exhaust structure is relatively complicated and expensive to produce, and therefore requires further improvement. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION The purpose of the present invention is to provide an automatic venting food container, which solves the problem of the complicated venting structure of the conventional food container by using an annular sealing strip. [Means for solving the problem]

[0006] The object of the present invention is achieved as follows: A self-venting food container includes a box and a lid removably connected thereto, a lid side wall formed at the lower end of the lid, a box side wall formed at the upper opening of the box and in contact with the lid side wall, a gap through which gas can pass between the box side wall and the lid side wall, an annular sealing strip formed on the outer wall of the lid side wall for sealing the gap, the annular sealing strip includes first sealing strips located on both the left and right sides of the lid side wall and second sealing strips located on both the front and rear sides of the lid side wall, the horizontal position of the second sealing strip being higher than the horizontal position of the first sealing strip.

[0007] Preferably, the lid side wall includes a first step portion and a first side wall portion, and the box side wall includes a second step portion and a second side wall portion, and a gap is provided between the first side wall portion and the second side wall portion through which gas can pass.

[0008] Preferably, the outer wall of the first side wall portion is provided with an annular sealing strip for sealing a gap, and the inner wall of the first side wall portion is provided with a reinforcing rib.

[0009] Preferably, a diagonal transition strip is molded between the first and second sealing strips.

[0010] Preferably, a notch is formed on one side of the upper opening of the box, and a knob portion extends from the notch. [Effects of the Invention]

[0011] Compared with the prior art, the present invention has excellent beneficial technical effects.

[0012] In this invention, the annular sealing strip design allows the lid to seal the box during normal use, extending the shelf life of food inside the box, preventing odor transfer, and improving hygiene. When the lunch box is heated in a microwave oven, the temperature inside the box rises, and the internal air pressure also rises. When the air pressure inside the box becomes higher than the air pressure outside the box, the lid is pushed and continues to move upward along the box side wall via the annular sealing strip. When the higher second sealing strip separates from its contact surface with the lid side wall, the lid stops moving, opening a gap between the box side wall and the lid side wall, allowing the high-pressure gas generated inside the box to escape to the outside through the gap. This automatically releases air and relieves pressure, effectively preventing the air pressure inside the lunch box from becoming too high after heating and causing an explosion. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a schematic diagram of the structure of the present invention. [Figure 2] FIG. 2 is an exploded view of the component structure of the present invention. [Figure 3] FIG. 2 is a top view of the structure of the present invention. [Figure 4] FIG. 4 is a cross-sectional view showing the structure of the AA portion in FIG. [Figure 5] FIG. 5 is a schematic cross-sectional view of the structure when the lid is moved upward in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. As shown in Figures 1 to 5, the automatic exhaust type food container includes a box body 1 and a lid body 2 removably connected thereto, a lid side wall 3 formed at the lower end of the lid body 2, a box side wall 4 in contact with the lid side wall 3 formed at the upper opening of the box body 1, a gap 5 through which gas passes is provided between the box side wall 4 and the lid side wall 3, and an annular sealing strip 6 for sealing the gap 5 is provided on the outer wall of the lid side wall 3, the annular sealing strip 6 including a first sealing strip 6a located on both the left and right sides of the lid side wall 3 and a second sealing strip 6b located on both the front and rear sides of the lid side wall 3, the horizontal position of the second sealing strip 6b being higher than the horizontal position of the first sealing strip 6a.

[0015] In this invention, the annular sealing strip 6 allows the lid 2 to seal the box 1 during normal use, extending the shelf life of food inside the box, preventing odor transfer, and improving hygiene. When the lunch box is heated in a microwave oven, the temperature inside the box 1 rises, and the internal air pressure also rises. When the air pressure inside the box becomes higher than the air pressure outside the box, the lid 2 is pushed and continues to move upward along the box side wall 4 via the annular sealing strip 6. When the higher second sealing strip 6b separates from its contact surface with the lid side wall 3, the movement of the lid 2 stops, opening the gap 5 between the box side wall 4 and the lid side wall 3, allowing the high-pressure gas generated inside the box to be released to the outside of the box through the gap 5. This automatically releases air and releases pressure, effectively preventing the air pressure inside the lunch box from becoming too high after heating and causing an explosion.

[0016] The lid side wall 3 includes a first step portion 3a and a first side wall portion 3b, and the box side wall 4 includes a second step portion 4a and a second side wall portion 4b, with a gap 5 through which gas can pass provided between the first side wall portion 3b and the second side wall portion 4b. During normal use, the lid 2 covers the upper opening of the box 1 and can seal the gap 5 via the annular sealing strip 6, preventing odor leakage from inside the box. In addition, the elastic contact between the step portion and the side wall portion enhances the sealing effect, effectively preventing the lid from coming off.

[0017] The outer wall of the first side wall portion 3b is provided with an annular sealing strip 6 for sealing the gap 5, and the inner wall of the first side wall portion 3b is provided with a reinforcing rib 7, thereby increasing the overall strength of the lid body, making it less likely to deform, and extending its service life.

[0018] A diagonal transition strip 8 is formed between the first sealing strip 6a and the second sealing strip 6b. In this technical solution, by designing two sealing strips at different heights, when the cover is raised to a predetermined height, the air pressure inside the box is released, and the lower first sealing strip 6a always remains in contact with the box side wall 4, thereby preventing the cover 2 from falling off the box 1.

[0019] A notch 9 is formed on one side of the upper opening of the box 1, and a knob 10 extends from the notch 9, making it easy to open the lid and use it.

[0020] The above has shown and explained the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above examples. The above examples and the contents described in the specification merely illustrate the principles of the present invention. Various modifications and improvements can be made to the present invention without departing from the spirit and scope of the present invention, and all such modifications and improvements are included in the scope of the claims of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents. [Explanation of symbols]

[0021] 1 box body 2 Lid 3 Lid side wall 3a First step 3b First side wall part 4 Box side wall 4a Second step 4b Second side wall part 5. Gap 6 Annular seal strip 6a First seal strip 6b Second seal strip 7 Reinforcing rib 8 Diagonal Transition Strips 9 Cutout 10 Knob

Claims

1. 1. A self-venting food container comprising a box (1) and a detachably connected lid (2), wherein a lid side wall (3) is formed at the lower end of the lid (2), a box side wall (4) is formed at the upper opening of the box (1) and comes into contact with the lid side wall (3), a gap (5) through which gas can pass is provided between the box side wall (4) and the lid side wall (3), and an annular sealing strip (6) is provided on the outer wall of the lid side wall (3) to seal the gap (5), the annular sealing strip (6) includes first sealing strips (6a) located on both the left and right sides of the lid side wall (3) and second sealing strips (6b) located on both the front and rear sides of the lid side wall (3), and the horizontal position of the second sealing strip (6b) is higher than the horizontal position of the first sealing strip (6a).

2. The automatic exhaust type food container according to claim 1, characterized in that the lid side wall (3) includes a first step portion (3a) and a first side wall portion (3b), the box side wall (4) includes a second step portion (4a) and a second side wall portion (4b), and a gap (5) through which gas can pass is provided between the first side wall portion (3b) and the second side wall portion (4b).

3. 3. The self-evacuating food container according to claim 2, wherein the outer wall of the first side wall portion (3b) is provided with an annular sealing strip (6) for sealing the gap (5), and the inner wall of the first side wall portion (3b) is provided with a reinforcing rib (7).

4. 2. The self-evacuating food container according to claim 1, wherein a diagonal transition strip (8) is formed between the first sealing strip (6a) and the second sealing strip (6b).

5. 2. The automatic exhaust type food container according to claim 1, wherein a notch (9) is formed on one side of the upper opening of the box body (1), and a handle portion (10) extends from the notch (9).

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