A press-lock type heated lunch box

Abstract

This invention discloses a press-lock type heated lunch box, comprising an outer shell, an inner liner detachably installed inside the outer shell, a heating component at the bottom of the outer shell, a power connector electrically connected to the heating component on the side of the outer shell, and a top cover at the top of the outer shell. The left and right edges of the top cover have horizontally extending locking mounting portions that extend beyond the outer wall of the outer shell. Opening and closing latches are fixedly installed within the locking mounting portions. The upper edge of the outer shell has a fastening portion adapted to the opening and closing latches. When the top cover is pressed down, the opening and closing latches automatically engage with the fastening portion. This invention has a simple structure and is easy to operate. A single press achieves a secure fastening of the top cover, eliminating the need to manually pry open multiple latches. Simultaneously, the extended structure of the locking mounting portion effectively prevents hot air escape when the lid is opened, preventing burns and improving safety and convenience.

Description

Technical Field

[0001] This invention belongs to the field of household kitchen appliance technology, specifically, it relates to a press-type heated lunch box with quick locking. Background Technology

[0002] Insulated lunch boxes are a common tool for people to carry meals. While there are many types of insulated lunch boxes on the market, they generally have some inconveniences in use. For example, some products require manual locking or latching of the lid, which is cumbersome and inconvenient; some products cause a large amount of hot air to rush out when the lid is opened, which can easily burn the user's face or hands, posing a safety hazard. Therefore, how to provide an insulated lunch box that is easy to operate, safe against burns, easy to disassemble, and has good sealing has become an urgent problem to be solved. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a press-type heated lunch box with quick locking.

[0004] This invention is achieved through the following technical solution: A press-lock type heated lunch box includes an outer shell, an inner liner removably installed inside the outer shell, a heating component at the bottom of the outer shell, a power connector electrically connected to the heating component on the side of the outer shell, and a top cover at the top of the outer shell. The left and right edges of the top cover have locking mounting portions extending horizontally beyond the outer wall of the outer shell. An opening and closing lock is fixedly installed in the locking mounting portion. The upper edge of the outer shell has a fastening portion adapted to the opening and closing lock. When the top cover is pressed down, the opening and closing lock automatically engages with the fastening portion.

[0005] Furthermore, the latch mounting part is a component integrally injection molded with the upper cover, with one side connected to the upper cover and the other side extending outward. Its interior is provided with a mounting groove for accommodating the opening and closing latch, and the inner side of the mounting groove is provided with several positioning holes and locking grooves.

[0006] Furthermore, the opening and closing latch is flat and elongated, and a hook corresponding to the positioning hole is provided on one side of the opening and closing latch. The bottom of the hook is provided with an slanted part to facilitate the hook to be smoothly engaged with the fastening part.

[0007] Furthermore, an n-shaped groove is formed on one side of the opening and closing latch, a latch strip is formed in the n-shaped groove, and a latch block is provided at the top front end of the latch strip, the latch block and the locking groove engaging with each other.

[0008] Furthermore, the top of the opening and closing latch is provided with an operating boss.

[0009] Furthermore, a number of pressure plates are provided on the other side of the opening and closing latch to abut against the inner wall of the mounting groove.

[0010] Furthermore, the inner wall of the outer shell is provided with a buckle, and the outer wall of the inner liner is provided with a slot that matches the buckle.

[0011] Furthermore, a spring is provided between the upper cover and the outer shell to spring the upper cover upward when the opening and closing latch is unlocked.

[0012] Furthermore, a sealing strip is provided between the top cover and the outer shell.

[0013] Furthermore, an inner liner sealing strip is provided between the inner liner and the outer shell.

[0014] According to embodiments of the present invention, at least the following beneficial effects are achieved: When using this product, only a downward pressing force needs to be applied to the top cover, and the latch of the opening and closing lock automatically engages with the fastening part of the outer shell, eliminating the need to manually pry open multiple latches one by one, making operation convenient and the locking secure. In addition, the latch mounting part extends horizontally and beyond the outer wall of the outer shell, effectively blocking hot air escaping from the gap when the cover is opened, preventing the user's hands from being burned.

[0015] 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. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a split view of the opening and closing latch of the present invention; Figure 3 This is a schematic diagram of the opening and closing latch of the present invention; Figure 4 This is a schematic diagram of the upper cover structure of the present invention; Figure 5 This is a schematic diagram of the structure of the upper cover of the present invention after the opening and closing latch is installed; Figure 6 for Figure 1 AA section view; Figure 7 for Figure 1 BB cross-sectional view; Explanation of markings in the diagram: 1: Outer shell; 10: Spring; 11: Fastening part; 12: Buckle; 2: Inner liner; 21: Slot; 3: Heating component; 4: Power connector; 5: Top cover; 6: Locking mounting part; 61: Mounting groove; 62: Positioning hole; 63: Clamping groove; 7: Opening and closing lock; 71: Hook; 72: Slant; 74: N-shaped groove; 75: Locking strip; 76: Locking block; 77: Operating boss; 78: Pressure plate; 8: Top cover sealing strip; 9: Inner liner sealing strip Detailed Implementation Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a corresponding orientation, or be constructed and operated in a corresponding orientation. Therefore, they should not be construed as limiting this invention.

[0018] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0019] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0020] Reference Figures 1 to 7 This invention provides a press-lock type heated lunch box, including an outer shell 1. The outer shell 1 is generally cylindrical or rectangular in shape and is made of heat-resistant plastic or metal, providing good structural strength. An inner liner 2 is detachably installed inside the outer shell 1. The inner liner 2 is preferably made of food-grade 304 stainless steel and is used to hold food, making it easy to clean and hygienic. A heating element 3 is located at the bottom of the outer shell 1. The heating element 3 can be a PTC heating element or a resistance wire heating plate, used to heat the inner liner 2. A power connector 4, electrically connected to the heating element 3, is located on the side of the outer shell 1. The power connector 4 is covered with a waterproof sleeve to ensure safe use.

[0021] The upper part of the outer casing 1 is provided with a top cover 5. The left and right edges of the top cover 5 are provided with locking mounting parts 6, which extend horizontally and exceed the outer wall of the outer casing 1. This extended structure design allows the locking mounting parts 6 to effectively block the hot air escaping from the gap between the outer casing 1 and the top cover 5 when the cover is open, preventing the user's hands from contacting the hot air and improving safety. An opening and closing latch 7 is fixedly installed inside the locking mounting part 6, and the upper edge of the outer casing 1 is provided with a fastening part 11 that is adapted to the opening and closing latch 7. When the user presses the top cover 5 down to the predetermined position, the opening and closing latch 7 automatically engages with the fastening part 11, realizing a one-button pressing and locking function, eliminating the need to manually pry open multiple latches, making the operation extremely convenient.

[0022] like Figures 2 to 4 As shown, the latch mounting part 6 is an integrally injection molded component with the upper cover 5, and its structure is stable and reliable, requiring no additional assembly. One side of the latch mounting part 6 is connected to the upper cover 5, and the other side extends outward, with the overall shape being a long strip or block. The interior of the latch mounting part 6 has a mounting groove 61 for accommodating the opening and closing latch 7. The mounting groove 61 is a rectangular recess used to accommodate and position the opening and closing latch 7. The inner side of the mounting groove 61 is provided with several positioning holes 62 and locking grooves 63. The positioning holes 62 are used to cooperate with the hooks 71 of the opening and closing latch 7 for positioning, and the locking grooves 63 are used to cooperate with the latch block 76 of the opening and closing latch 7 to achieve locking.

[0023] like Figure 3 As shown, the opening and closing latch 7 is flat and elongated, made entirely of elastic plastic or metal, and has a certain degree of elastic deformation capability. One side of the opening and closing latch 7 is provided with a hook 71 corresponding to the positioning hole 62, and the number of hooks 71 matches the number of positioning holes 62. The bottom of the hook 71 has a sloping portion 72, which has an inclined surface structure, facilitating the hook 71 to slide smoothly into and engage with the latching part 11 during the latching process, reducing the pressure required and improving the operating feel.

[0024] One side of the opening and closing latch 7 has an n-shaped groove 74, which is an inverted U-shaped structure composed of three grooves. Within the n-shaped groove 74, a flexible latch bar 75 is formed. A latch block 76 is located at the top front end of the latch bar 75. The latch block 76 is protruding and engages with the locking groove 63. When the opening and closing latch 7 is installed in place, the latch block 76 is embedded in the locking groove 63, forming a stable locking state and preventing the opening and closing latch 7 from loosening or falling off during use.

[0025] The top of the latch 7 is provided with an operating protrusion 77, which is arc-shaped and protrudes, making it easy for users to press or pry with their fingers when unlocking, providing a good operating force point and improving the convenience of unlocking.

[0026] On the other side of the opening and closing latch 7, there are several pressure plates 78. The pressure plates 78 are thin sheet-like structures that elastically abut against the inner wall of the mounting groove 61. The design of the pressure plates 78 ensures that the opening and closing latch 7 has a pre-tightening force in the mounting groove 61, ensuring that the opening and closing latch 7 remains stable when not subjected to external force, and will not shake or shift due to vibration or tilting. At the same time, it can absorb assembly tolerances and ensure tight assembly.

[0027] In addition, other solutions can be adopted in the actual manufacturing process of the opening and closing latch 7, such as setting magnets on the mating surfaces of the opening and closing latch 7 and the fastening part 11 respectively. When the top cover is pressed down, the magnetic attraction helps guide the latch block and attract it to the fastening position; when unlocking, it can be easily separated after overcoming the magnetic attraction.

[0028] like Figure 6 As shown, the inner wall of the outer shell 1 is provided with buckles 12, preferably elastic buckles, and several buckles are evenly distributed along the circumference of the inner wall of the outer shell 1. The outer wall of the inner liner 2 is provided with a groove 21 that matches the buckles 12. When installing the inner liner 2, the inner liner 2 is placed into the outer shell 1 and pressed down. The buckles 12 deform elastically under force and then snap into the groove 21, realizing the quick installation of the inner liner 2.

[0029] like Figure 7 As shown, a spring 10 is provided between the upper cover 5 and the outer shell 1. Specifically, spring mounting cavities are provided on the front and rear edges of the upper cover 5. A spring 10 and a guide post are installed within each spring mounting cavity. The guide post extends out of the spring mounting cavity under the force of the spring 10 and contacts the upper boss of the outer shell 1. When the upper cover 5 is in the locked state, the guide post compresses the spring 10 to store energy. When the locking latch 7 is unlocked, the spring 10 releases energy, causing the upper cover 5 to spring upwards to a certain height via the guide post, creating a gap between the upper cover 5 and the outer shell 1. This allows internal heat to escape in an orderly manner, preventing a sudden surge of heat that could cause burns.

[0030] A sealing strip 8 is provided between the top cover 5 and the outer shell 1. The sealing strip 8 is preferably made of silicone and is embedded in the bottom surface of the top cover 5 or the top surface of the outer shell 1 in a ring shape. It is used to block the air flow between the top cover 5 and the outer shell 1 and improve the heat preservation effect.

[0031] An inner liner sealing strip 9 is provided between the inner liner 2 and the outer shell 1. The inner liner sealing strip 9 is preferably made of silicone and is installed on the upper edge of the inner liner 2 or on the inner wall step of the outer shell 1. It is used to prevent food residue or soup from entering the cavity between the outer shell 1 and the inner liner 2, which facilitates cleaning and improves the sealing performance.

[0032] When using the lunchbox of this invention, the user first opens the top cover 5, places the food into the inner liner 2, and then presses down on the top cover 5. The latch 71 of the opening and closing lock 7 automatically slides into the fastening part 11 and locks under the guidance of the inclined part 72. After the power is turned on, the heating component 3 heats the inner liner 2. When it is necessary to remove the food, the user presses or pries the operating protrusion 77 with their finger to unlock the opening and closing lock 7. When unlocking, the spring 10 first lifts the top cover 5 a certain distance to allow the internal hot air to escape in an orderly manner and prevent the hot air from rushing up instantly. Then the top cover 5 can be fully opened.

[0033] When using this product, simply apply downward pressure to the top cover 5, and the latch 71 of the opening and closing lock 7 will automatically engage with the fastening part 11 of the outer shell 1. There is no need to manually pry open multiple latches one by one, making operation convenient and the lock secure. In addition, the latch mounting part 6 extends horizontally and beyond the outer wall of the outer shell, which can effectively block the hot air escaping from the gap when the cover is opened, preventing the user's hands from being burned.

[0034] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A press-lock type heated lunch box, comprising an outer shell (1), an inner liner (2) detachably installed inside the outer shell (1), a heating assembly (3) disposed at the bottom of the outer shell (1), and a power connector (4) electrically connected to the heating assembly (3) disposed on the side of the outer shell (1), characterized in that: The outer shell (1) is provided with a top cover (5) on the upper part. The top cover (5) has a locking mounting part (6) extending horizontally and beyond the outer wall of the outer shell (1) on its left and right edges. An opening and closing lock (7) is fixedly installed in the locking mounting part (6). The upper edge of the outer shell (1) is provided with a fastening part (11) that is adapted to the opening and closing lock (7). When the top cover (5) is pressed down, the opening and closing lock (7) automatically fastens to the fastening part (11).

2. The press-lock type heated lunch box according to claim 1, characterized in that: The latch mounting part (6) is a component integrally injection molded with the upper cover (5). One side is connected to the upper cover (5), and the other side extends outward. It has an installation groove (61) inside to accommodate the opening and closing latch (7). The installation groove (61) has several positioning holes (62) and clamping grooves (63) inside.

3. A press-lock type heated lunch box according to claim 2, characterized in that: The opening and closing latch (7) is flat and long. One side of the opening and closing latch (7) is provided with a hook (71) corresponding to the positioning hole (62). The bottom of the hook (71) is provided with an inclined part (72) to facilitate the hook (71) to be smoothly fastened to the fastening part (11).

4. A press-lock type heated lunch box according to claim 3, characterized in that: The opening and closing latch (7) has an n-shaped groove (74) on one side, and a latch strip (75) is formed in the n-shaped groove (74). A latch block (76) is provided at the top front end of the latch strip (75), and the latch block (76) engages with the locking groove (63).

5. A press-lock type heated lunch box according to claim 4, characterized in that: The top of the opening and closing latch (7) is provided with an operating boss (77).

6. A press-lock type heated lunch box according to claim 5, characterized in that: On the other side of the opening and closing latch (7), several pressure plates (78) are provided for abutting against the inner wall of the mounting groove (61).

7. A press-lock type heated lunch box according to claim 6, characterized in that: The inner wall of the outer shell (1) is provided with a buckle (12), and the outer wall of the inner liner (2) is provided with a slot (21) that is adapted to the buckle (12).

8. A press-lock type heated lunch box according to claim 1, characterized in that: A spring (10) is provided between the upper cover (5) and the outer shell (1) for lifting the upper cover (5) upward when the opening and closing latch (7) is unlocked.

9. A press-lock type heated lunch box according to claim 1, characterized in that: A sealing strip (8) is provided between the top cover (5) and the outer shell (1).

10. A press-lock type heated lunch box according to claim 1, characterized in that: An inner liner sealing strip (9) is provided between the inner liner (2) and the outer shell (1).

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