Thermal lunch box

Abstract

The utility model discloses a kind of heatable heat preservation lunch boxes, including installation shell, place lunch box and lunch box cover, heating component, rechargeable battery, main control circuit board and charging circuit board.Heating component is set in lunch box bottom, and heat is evenly transmitted to lunch box by heat-conducting aluminium dish, main control circuit board is used to control heating temperature and reservation time, and charging circuit board charges detachable rechargeable battery.Lunch box cover is equipped with exhaust device and can overturn fixing frame, and is connected hand strap, convenient to carry.Battery mounting groove is independent store design, and battery can be conveniently replaced, and service life is extended.The heat preservation lunch box is heated by controllable, reservation start and portable design, realize food fast heating and heat preservation, easy to operate, suitable for office workers and go out, give consideration to safety and practicality, satisfy eu replaceable battery regulation requirement.

Description

Technical Field

[0001] This utility model belongs to the technical field of insulated lunch boxes, specifically relating to an insulated lunch box that is rechargeable, heat-generating, and easy to carry. Background Technology

[0002] With the fast pace of modern life, the demand for portable meals and mobile heating is increasing, especially in scenarios such as offices, travel, and fieldwork, where users want to be able to eat warm food anytime.

[0003] Existing portable insulated lunch boxes mostly rely on vacuum or insulation materials to maintain food temperature. Although they can extend the food's heat retention time, they cannot actively heat the food and require an external microwave oven or other heat source, making them inconvenient to use.

[0004] In addition, most existing insulated lunch boxes that can be heated rely on power cords for power, which limits their use and makes them inconvenient to carry; the batteries are not removable or replaceable, limiting their lifespan; and some products lack a convenient handle design or a safety venting device, which may generate excessive steam pressure during the heating process, posing a safety hazard.

[0005] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0006] In view of the technical problems mentioned in the background art, the purpose of this utility model is to provide a rechargeable, heatable, and portable insulated lunch box to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an insulated lunch box, comprising a mounting shell, a lunch box mounted on the upper inner part of the mounting shell, a lunch box lid mounted on the top of the lunch box, a heating element mounted on the lower inner part of the mounting shell, the heating element being correspondingly disposed at the bottom of the lunch box, a battery mounting groove recessed on the lower surface of the mounting shell, a rechargeable battery mounted in the battery mounting groove, a main control circuit board mounted on the front inner part of the mounting shell, the main control circuit board being electrically connected to the heating element and the rechargeable battery respectively, and a charging circuit board mounted on the rear inner part of the mounting shell, the charging circuit board being electrically connected to the rechargeable battery.

[0008] Furthermore, the heating component includes a heating element, a heat-conducting aluminum plate, and an aluminum plate bracket. The heat-conducting aluminum plate is correspondingly disposed at the bottom of the lunch box, which is made of stainless steel. The heating element is installed on the inner top of the heat-conducting aluminum plate. The surface of the aluminum plate bracket is provided with an aluminum plate mounting groove, in which the heat-conducting aluminum plate is embedded.

[0009] Furthermore, the inner bottom surface of the mounting housing is uniformly provided with a number of fixing holes, and the outer edge of the aluminum disc bracket is uniformly provided with a number of fixing posts. The number of fixing holes and the number of fixing posts correspond one-to-one, and are connected and fixed by fasteners passing through the fixing holes and fixing posts, thereby fixing the heating component in the lower inner part of the mounting housing.

[0010] Furthermore, the bottom of the battery mounting slot is covered with a battery door, and the upper two sides of the battery mounting slot are symmetrically provided with door through holes. The upper two sides of the battery door are symmetrically provided with door through blocks. The door through blocks correspond to the door through holes and are connected and fixed by fasteners passing through the door through blocks and the door through holes, thereby realizing the detachable connection between the battery door and the battery mounting slot.

[0011] Furthermore, a circuit board bracket is fixedly installed on the outer side of the main control circuit board, and a first circuit board mounting part is provided in the inner front part of the mounting housing. The circuit board bracket is fixedly installed on the first circuit board mounting part by fasteners. A temperature display part and several control switches are respectively installed on the front surface of the main control circuit board. Several control switches are respectively located below the temperature display part. A panel mounting groove is provided on the outer surface of the first circuit board mounting part, and an operation panel is embedded in the panel mounting groove.

[0012] Furthermore, a charging mounting bracket is fixedly installed on the outer side of the charging circuit board, and a second circuit board mounting part is provided in the inner rear part of the mounting housing. The charging mounting bracket is fixedly installed on the second circuit board mounting part by fasteners. A charging connector is provided on the surface of the charging circuit board, and a connector opening is opened on the surface of the second circuit board mounting part. The charging connector is embedded in the connector opening.

[0013] Furthermore, the surface of the lunchbox lid has an exhaust opening, and a sealing plug is sealed to the exhaust opening.

[0014] Furthermore, the top outer edge of the lunchbox has a protruding mounting edge, and the outer edge of the lunchbox lid has a number of fixing buckles evenly distributed. The fixing buckles are respectively fastened to the mounting edge, so that the lunchbox lid is stably mounted on the top of the lunchbox.

[0015] Furthermore, the outer side of the lunchbox lid is provided with a fixing bracket, the top rear sides of the mounting housing are symmetrically provided with movable connecting positions, the rear sides of the fixing bracket are symmetrically provided with movable connecting parts, the movable connecting parts can be movably fastened in the movable connecting positions, the top front sides of the mounting housing are symmetrically provided with connecting slots, the front sides of the fixing bracket are symmetrically provided with connecting buckles, the connecting buckles are fixedly fastened in the connecting slots, so that the fixing bracket can be flipped and fixedly installed on the lunchbox lid.

[0016] Furthermore, a handle is connected to the fixed frame, and handle slots are symmetrically provided on both sides of the fixed frame. Handle heads are symmetrically provided at both ends of the handle, and the two handle heads are respectively engaged in the two handle slots, thereby fixing the handle to the fixed frame.

[0017] This utility model has the following advantages: This insulated lunch box is powered by a rechargeable battery and can heat the food inside, achieving a convenient heating function that can be used without an external power source. The heating element enhances ease of use. The handle on the mounting frame allows for easy carrying and transport, improving portability and safety. The exhaust vent with a sealing plug allows steam generated during heating to escape, ensuring a tight seal and safe operation. The battery mounting slot has an independent compartment structure, allowing for removable and replaceable rechargeable batteries, facilitating maintenance and extending the overall lifespan of the device. The heating element is fixedly connected to the mounting housing via an aluminum plate bracket, and the main control circuit board and charging circuit board are fixed to the mounting section via brackets, ensuring the internal components are stable and reliable. The lunch box is made of stainless steel, and the heat-conducting aluminum plate effectively transfers heat, ensuring even heating and good heat retention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model.

[0020] Figure 3 This is an exploded view of the mounting housing and rechargeable battery of this utility model.

[0021] Figure 4 This is an exploded structural diagram of the heating component of this utility model.

[0022] Figure 5 This is a schematic diagram of the mounting housing structure of this utility model.

[0023] Figure 6 This is an exploded view of the mounting housing and charging circuit board of this utility model.

[0024] Figure 7 This is an exploded view of the fixing frame and handle strap of this utility model.

[0025] Reference numerals: Mounting housing 10; Lunch box holder 20; Lunch box lid 30; Heating element 40; Battery mounting slot 11; Rechargeable battery 50; Main control circuit board 60; Charging circuit board 70; Heating element 41; Heat-conducting aluminum plate 42; Aluminum plate bracket 43; Aluminum plate mounting slot 431; Fixing perforation 12; Fixing through post 432; Battery door 51; Door perforation 111; Door through block 511; Circuit board bracket 61; First circuit board mounting part 13; Temperature display part 62; Control switch 63; Panel mounting slot 131; Operation panel 64; Charging mounting bracket 71; Second circuit board mounting part 14; Charging connector 72; Connector opening 141; Mounting clip edge 21; Fixing buckle 31; Exhaust opening 32; Sealing plug 33; Fixing bracket 80; Movable connection position 15; Movable connection part 81; Connection slot 16; Connection buckle 82; Handle strap 90; Strap slot 83; Strap clip head 91. Detailed Implementation

[0026] like Figures 1 to 7 As shown, an insulated lunch box includes a mounting housing 10. A lunch box 20 is mounted on the upper inner part of the mounting housing 10, and a lunch box lid 30 is mounted on the top of the lunch box 20. A heating element 40 is mounted on the lower inner part of the mounting housing 10, and the heating element 40 is correspondingly disposed at the bottom of the lunch box 20. A battery mounting groove 11 is recessed on the lower surface of the mounting housing 10, and a rechargeable battery 50 is installed in the battery mounting groove 11. A main control circuit board 60 is mounted on the front inner part of the mounting housing 10. The main control circuit board 60 is electrically connected to the heating element 40 and the rechargeable battery 50, and is used to control the working state of the heating element. A charging circuit board 70 is mounted on the rear inner part of the mounting housing 10. The charging circuit board 70 is electrically connected to the rechargeable battery 50 and is used to charge the rechargeable battery. In use, the user places food into the food container 20 and closes the lid 30. The user then sets the heating temperature and timer via the control panel. Once the set time is reached, the main control circuit board 60 receives a control command and powers on the heating element 40, which transfers heat to the bottom of the food container 20 to heat the food. When the rechargeable battery 50 is low on power, it can be charged via an external power source connected to the charging circuit board 70. Once charged, the device can continue to be used. Because the battery mounting slot 11 has an independent compartment design, the rechargeable battery 50 can be removed and replaced, facilitating maintenance and extending the overall lifespan of the device.

[0027] In practical implementation, the heating component 40 includes a heating element 41, a heat-conducting aluminum plate 42, and an aluminum plate support 43. The heat-conducting aluminum plate 42 is correspondingly disposed at the bottom of the lunch box 20, which is made of stainless steel. The heating element 41 is installed on the inner top of the heat-conducting aluminum plate 42 to generate heat. The surface of the aluminum plate support 43 is provided with an aluminum plate mounting groove 431, and the heat-conducting aluminum plate 42 is embedded in the aluminum plate mounting groove 431 to ensure the stable installation of the heat-conducting aluminum plate 42 and the heating element 41. The inner bottom surface of the mounting housing 10 is evenly provided with a plurality of fixing holes 12, and the outer edge of the aluminum plate bracket 43 is evenly provided with a plurality of fixing posts 432. The plurality of fixing holes 12 and the plurality of fixing posts 432 correspond one to one, and are connected and fixed by fasteners passing through the fixing holes 12 and the fixing posts 432, thereby fixing the heating component 40 in the lower inner part of the mounting housing 10. When in use, the heating element 41 generates heat after being powered on, and the heat is evenly transferred to the bottom of the lunch box 20 through the heat-conducting aluminum plate 42, so that the food in the lunch box 20 is heated quickly.

[0028] In practical implementation, the bottom of the battery mounting slot 11 is covered with a battery door 51. Symmetrical cover door through holes 111 are provided on both sides of the upper part of the battery mounting slot 11, and symmetrical cover door through blocks 511 are provided on both sides of the upper part of the battery door 51. The cover door through blocks 511 correspond to the cover door through holes 111 and are connected and fixed to the cover door through holes 111 by fasteners passing through them, thus achieving a detachable connection between the battery door 51 and the battery mounting slot 11. During use, the user can open the battery door 51 by removing the fasteners, facilitating the removal or replacement of the rechargeable battery 50. After the battery door 51 is reinstalled and fixed with fasteners, the rechargeable battery 50 can be stably housed within the battery mounting slot 11, ensuring safety and stability during use. This structure not only meets daily usage needs but also facilitates the replacement of the rechargeable battery 50 after its lifespan expires, complying with regulations for replaceable batteries and extending the overall lifespan of the product.

[0029] In practical implementation, a circuit board bracket 61 is fixedly mounted on the outer side of the main control circuit board 60. A first circuit board mounting part 13 is provided at the inner front of the mounting housing 10. The circuit board bracket 61 is fixedly mounted on the first circuit board mounting part 13 by fasteners, thereby ensuring the stable positioning of the main control circuit board 60 within the mounting housing 10. A temperature display part 62 and several control switches 63 are respectively mounted on the front surface of the main control circuit board 60. The control switches 63 are respectively located below the temperature display part 62, allowing the user to adjust and operate the heating temperature and preset time. A panel mounting groove 131 is provided on the outer surface of the first circuit board mounting part 13, in which an operation panel 64 is embedded, allowing the user to intuitively control the temperature display part 62 and the control switches 63 through the operation panel 64. During use, the user can observe the temperature of the food inside the lunchbox 20 in real time through the operation panel 64, and set the heating temperature, start or stop heating, and set the preset heating time through the control switches 63, thereby achieving automatic heating and heat preservation functions.

[0030] In practical implementation, a charging mounting bracket 71 is fixedly installed on the outer side of the charging circuit board 70. A second circuit board mounting portion 14 is provided at the inner rear of the mounting housing 10. The charging mounting bracket 71 is fixedly installed on the second circuit board mounting portion 14 by fasteners, thereby ensuring the stable positioning of the charging circuit board 70 within the mounting housing 10. A charging connector 72 is provided on the surface of the charging circuit board 70, and a connector opening 141 is opened on the surface of the second circuit board mounting portion 14. The charging connector 72 is embedded in the connector opening 141, forming an electrical connection path between the external power supply and the charging circuit board 70. During use, when the rechargeable battery 50 is low on power, the user can connect an external power source through the charging connector 72 to charge the rechargeable battery 50. After charging is complete, the charging circuit board 70 automatically stops charging, ensuring the safe use of the rechargeable battery 50, and can continue to supply power to the heating element 40 and the main control circuit board 60, thereby maintaining the normal operation of the insulated lunch box.

[0031] In practical implementation, the top outer edge of the lunchbox 20 is provided with a mounting edge 21, and the outer edge of the lunchbox lid 30 is provided with several fixing buckles 31 evenly distributed. These fixing buckles 31 are respectively fastened to the mounting edge 21, thereby ensuring that the lunchbox lid 30 is stably mounted on the top of the lunchbox 20, preventing it from easily falling off during handling or flipping. In use, after the user places food into the lunchbox 20, they close the lunchbox lid 30. The fixing buckles 31 engage with the mounting edge 21, ensuring the lunchbox lid 30 firmly covers the lunchbox 20, guaranteeing a seal, preventing food leakage, and providing reliable protection during heating or heat preservation.

[0032] In practical implementation, the surface of the lunchbox lid 30 is provided with a vent 32, and a sealing plug 33 is sealed to the vent 32 to release steam during heating and prevent excessive internal pressure. During use, when the heating element 40 heats the food placed inside the lunchbox 20, the user can pull up the sealing plug 33 as needed, allowing excess steam to escape from the vent 32, thereby maintaining internal pressure balance, ensuring safe heating, and preventing food spillage or affecting the seal. After heating is complete, the user can replace the sealing plug 33 with the vent 32 to achieve the functions of sealing and heat preservation of the lunchbox.

[0033] In practical implementation, the outer side of the lunch box lid 30 is provided with a fixing bracket 80, and the top rear sides of the mounting housing 10 are symmetrically provided with movable connecting positions 15. The rear sides of the fixing bracket 80 are symmetrically provided with movable connecting parts 81, which can be movably fastened in the movable connecting positions 15. The top front sides of the mounting housing 10 are symmetrically provided with connecting slots 16, and the front sides of the fixing bracket 80 are symmetrically provided with connecting buckles 82, which are fixedly fastened to the connecting slots 16. Thus, the fixing bracket 80 can be flipped and fixedly installed on the lunch box lid 30. In use, the user can open or close the lunch box lid 30 by flipping the fixing bracket 80. The movable connecting parts 81 cooperate with the movable connecting positions 15 to achieve smooth flipping, and the connecting buckles 82 cooperate with the connecting slots 16 to ensure stability and sealing effect when closed, thereby facilitating the taking out and heating of food, while ensuring safety and sealing during use.

[0034] In practical implementation, the fixed frame 80 is connected to a handle 90. The fixed frame 80 has symmetrical handle slots 83 on both sides, and the handle 90 has symmetrical handle heads 91 at both ends. The two handle heads 91 are respectively engaged in the two handle slots 83, so that the handle 90 is fixedly connected to the fixed frame 80. When in use, the user can easily carry the insulated lunch box through the handle 90, realizing movement and transportation. The handle 90 is firmly connected to the fixed frame 80, ensuring the stability of the lunch box lid 30 and the lunch box 20 during the lifting process, improving the portability and safety of the product.

[0035] In summary, this insulated lunch box is powered by a rechargeable battery 50, which heats the food inside the lunch box 20, providing convenient heating without the need for an external power source. The heating element 40 further enhances its ease of use. The mounting bracket 80 features a handle 90 for easy carrying and transport, improving portability and safety. The vent 32, combined with a sealing plug 33, allows for the removal of steam generated during heating, ensuring a tight seal and safe operation. The battery mounting slot 11 has an independent compartment structure, allowing for the removal and replacement of the rechargeable battery 50, facilitating maintenance and extending the overall lifespan of the device. The heating element 40 is fixedly connected to the mounting housing 10 via an aluminum plate bracket 43. The main control circuit board 60 and the charging circuit board 70 are fixed to the mounting section via brackets, ensuring the internal components are stable and reliable. The lunch box 20 is made of stainless steel, and the heat-conducting aluminum plate 42 effectively transfers heat, ensuring even heating and good heat retention.

Claims

1. A thermal lunch box, characterized in that, It includes a mounting housing (10), a lunchbox (20) is mounted on the upper inner part of the mounting housing (10), a lunchbox lid (30) is mounted on the top of the lunchbox (20), a heating element (40) is mounted on the lower inner part of the mounting housing (10), the heating element (40) is correspondingly disposed at the bottom of the lunchbox (20), a battery mounting groove (11) is recessed on the lower surface of the mounting housing (10), a rechargeable battery (50) is installed in the battery mounting groove (11), a main control circuit board (60) is mounted on the front inner part of the mounting housing (10), the main control circuit board (60) is electrically connected to the heating element (40) and the rechargeable battery (50) respectively, and a charging circuit board (70) is mounted on the rear inner part of the mounting housing (10), the charging circuit board (70) is electrically connected to the rechargeable battery (50); The heating component (40) includes a heating element (41), a heat-conducting aluminum plate (42), and an aluminum plate bracket (43). The heat-conducting aluminum plate (42) is correspondingly disposed at the bottom of the lunch box (20). The lunch box (20) is made of stainless steel. The heating element (41) is installed on the inner top of the heat-conducting aluminum plate (42). The surface of the aluminum plate bracket (43) is provided with an aluminum plate mounting groove (431), and the heat-conducting aluminum plate (42) is embedded in the aluminum plate mounting groove (431). The inner bottom surface of the mounting housing (10) is uniformly provided with a plurality of fixing holes (12), and the outer edge of the aluminum disc bracket (43) is uniformly provided with a plurality of fixing posts (432). The plurality of fixing holes (12) and the plurality of fixing posts (432) correspond one to one, and are connected and fixed by fasteners passing through the fixing holes (12) and the fixing posts (432), so that the heating component (40) is fixedly installed in the lower inner part of the mounting housing (10); The bottom of the battery mounting slot (11) is covered with a battery door (51). The upper sides of the battery mounting slot (11) are symmetrically provided with door through holes (111). The upper sides of the battery door (51) are symmetrically provided with door through blocks (511). The door through blocks (511) correspond to the door through holes (111), and are connected and fixed by fasteners passing through the door through blocks (511) and the door through holes (111), thereby realizing the detachable connection between the battery door (51) and the battery mounting slot (11). The main control circuit board (60) is fixedly mounted with a circuit board bracket (61) on its outer side. The front inner part of the mounting housing (10) is provided with a first circuit board mounting part (13). The circuit board bracket (61) is fixedly mounted on the first circuit board mounting part (13) by fasteners. The front surface of the main control circuit board (60) is respectively mounted with a temperature display part (62) and a number of control switches (63). The number of control switches (63) are respectively located below the temperature display part (62). The outer surface of the first circuit board mounting part (13) is provided with a panel mounting groove (131). An operation panel (64) is embedded in the panel mounting groove (131). A charging mounting bracket (71) is fixedly installed on the outer side of the charging circuit board (70). A second circuit board mounting part (14) is provided in the inner rear part of the mounting housing (10). The charging mounting bracket (71) is fixedly installed on the second circuit board mounting part (14) by fasteners. A charging connector (72) is provided on the surface of the charging circuit board (70). A connector opening (141) is opened on the surface of the second circuit board mounting part (14). The charging connector (72) is inserted into the connector opening (141). The surface of the lunch box lid (30) is provided with an exhaust opening (32), and a sealing plug (33) is sealed in the exhaust opening (32). The top outer edge of the lunch box (20) is provided with a mounting clip edge (21), and the outer edge of the lunch box lid (30) is provided with a number of fixing buckles (31). The number of fixing buckles (31) are respectively fastened to the mounting clip edge (21), so that the lunch box lid (30) is stably covered on the top of the lunch box (20). The outer side of the lunch box lid (30) is provided with a fixing bracket (80). The top rear sides of the mounting housing (10) are symmetrically provided with movable connecting positions (15). The rear sides of the fixing bracket (80) are symmetrically provided with movable connecting parts (81). The movable connecting parts (81) can be movably fastened in the movable connecting positions (15). The top front sides of the mounting housing (10) are symmetrically provided with connecting slots (16). The front sides of the fixing bracket (80) are symmetrically provided with connecting buckles (82). The connecting buckles (82) are fixedly fastened to the connecting slots (16), so that the fixing bracket (80) can be flipped and fixedly installed on the lunch box lid (30). The fixed frame (80) is connected to a handle (90). The fixed frame (80) has symmetrical handle slots (83) on both sides. The handle (90) has symmetrical handle heads (91) at both ends. The two handle heads (91) are respectively engaged in the two handle slots (83), so that the handle (90) is fixedly connected to the fixed frame (80).

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