Handle lockable lunch box

Abstract

The utility model belongs to the field of daily necessities, and particularly relates to a lunch box with lockable handle, which solves the problem that the handle is prone to rotating randomly relative to the box body after being unfolded and cannot be locked. The lunch box with lockable handle comprises a box body in a cylindrical shape, a handle is rotatably connected to the box body through a mounting seat at the side of the box body, a locking structure is arranged between the handle and the mounting seat, and the handle can be locked and rotationally limited after being completely unfolded. The handle can be locked after being completely unfolded, and the rotation of the handle relative to the box body is limited.

Description

Technical Field

[0001] This utility model belongs to the field of daily necessities, and specifically relates to a lunch box with a lockable handle. Background Technology

[0002] A lunchbox is a box specifically designed to hold food, also known as a bento box. It greatly facilitates people's lives, especially outdoors or in situations where meals are brought along. A lunchbox generally consists of a body and a handle. The handle is rotatably connected to the body, allowing it to be rotated to close for easy storage or to unfold for easy handling.

[0003] However, in the existing technology, most boxes and handles lack a corresponding locking structure, and cannot restrict the reverse rotation after the handle is unfolded. For example, when the handle is unfolded and needs to be cleaned or inverted (when the box is empty or has little contents), the handle can easily rotate freely relative to the box, which is inconvenient. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a lunchbox with a lockable handle.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A lunchbox with a lockable handle includes a cylindrical box body, a handle rotatably connected to the side of the box body via a mounting base, and a locking structure between the handle and the mounting base, which can lock the handle to a rotational limit when it is fully extended.

[0007] The main body of this utility model lunchbox is a box body with a holding cavity inside. A handle is provided on the side of the box body for the user to pick up. The handle can rotate vertically and unfolds when rotated away from the box body. In the fully unfolded state, the handle is basically horizontal, and the inner end of the handle abuts against the outer wall of the box body. A locking structure can limit and lock the rotation of the handle in this state to keep it in this horizontal state. Of course, the locking structure is provided with a corresponding pressing part to release the limit lock when needed. When the handle is rotated close to the box body, it retracts. In the fully retracted state, the main body of the handle is attached to the top of the box body for easy storage.

[0008] In the aforementioned lunchbox with a lockable handle, the mounting section of the handle is hinged to the outer wall of the mounting base, and a mounting cavity is formed within the mounting base, wherein the locking structure is provided.

[0009] The mounting base is hollow inside, and its mounting cavity extends vertically, with the locking structure located in the mounting cavity.

[0010] In the aforementioned lunchbox with a lockable handle, the mounting base is a square cylindrical structure with the opening facing the box body. A fixing ear is provided on the outer wall of the opening, and the fixing ear is attached to and fixed to the outer wall of the box body.

[0011] The mounting base is preferably square in shape and has at least two parallel and vertically extending sides for connecting the handle. The mounting base can be a cylindrical shape with one end open, covering the outer wall of the box. A fixing ear extending away from the mounting base is provided on the outer wall of the open end, forming a Z-shaped structure. The fixing ear is attached to the outer wall of the box and fixed by means such as bolts, screws, rivets or welding.

[0012] In the aforementioned lunchbox with a lockable handle, the locking structure includes a locking member that can be vertically slidably disposed within the mounting cavity. The locking member is provided with a downwardly bent limiting hook. An elastic component is provided between the upper part of the locking member and the inner top surface of the mounting cavity. The lower part of the locking member extends out of the mounting cavity and is provided with a pressing part.

[0013] The upper part of the locking component is a square structure adapted to the shape of the mounting cavity. This upper part slides within the mounting cavity, and an elastic component is provided between its top surface and the inner top surface of the mounting cavity. This elastic component can be a cylindrical spring or a conical spring, which applies a downward elastic force to the locking component, causing the limiting hook of the locking component to have an elastic tendency to extend downward. The lower part of the locking component includes a connecting piece that slides along the outer wall of the box. The upper end of the connecting piece is connected to the upper part and is provided with a limiting hook, while the lower end is provided with a pressing part. The limiting hook is located inside the mounting cavity, and the pressing part is located outside the mounting cavity. A through hole for the connecting piece to pass through is provided on the bottom side of the mounting cavity near the box. The pressing part bends away from the box body, and there is a pressing gap between it and the bottom surface of the mounting base. This gap ensures that the user can press the locking part upward to retract the limiting hook body upward to release the rotation limit of the handle. In addition, it also avoids obstruction and interference with the inner end of the handle. When the handle is fully extended, its inner end is located between the pressing part and the mounting base, and there is still a gap between the pressing part and the inner end of the handle at this time.

[0014] In the aforementioned handle-lockable lunchbox, the limiting hook includes a connecting section extending away from the box body and a bent section extending downward at the front end of the connecting section. The bottom surface of the mounting cavity is provided with a clearance opening that allows the bent section to extend downward. The bent section includes a first limiting surface and a guide surface arranged at an acute angle. The first limiting surface faces the box body, and the guide surface faces away from the box body and is inclined downward.

[0015] The limiting hook is a sheet-like structure located in a vertical plane. The length direction of the connecting section is perpendicular to the movement direction of the locking element. The bent section is located at the end of the connecting section away from the housing and bends downward. The clearance opening is located on the bottom surface of the mounting cavity for the bent section to extend downward. The lower end of the bent section has an acute angle, and its guide surface is used to allow the locking element to rise and make clearance when the handle is rotated. The first limiting surface is used to restrict the reverse rotation of the handle.

[0016] In the aforementioned lunchbox with a lockable handle, the inner end of the handle is provided with an upwardly bent limiting part; during the opening of the handle, the top of the limiting part slides along the guide surface, pushing the locking member upward; after the handle is fully opened, the limiting part enters between the bent section and the box body, and its second limiting surface is in contact with the first limiting surface, restricting the handle from reversing and closing.

[0017] The limiting part bends upward and has a second limiting surface facing away from the box body. The upper end of the limiting part can slide and cooperate with the guide surface to push the locking member upward. When the handle is fully extended, the first limiting surface and the second limiting surface are opposite and attached to each other, which can restrict the reverse rotation of the handle.

[0018] In the aforementioned lunchbox with a lockable handle, the handle is L-shaped and includes a grip section and a mounting section that are perpendicular to each other. The mounting section is plate-shaped and has two parallel sections. One end of the mounting section is integrally connected to the inner end of the grip section, and the other end is rotatably connected to the outer wall of the mounting base. When the handle is fully extended, the side of the mounting section away from the grip section abuts against the outer wall of the box.

[0019] The handle section and the mounting section are arranged vertically. The mounting section is plate-shaped and fits against the side wall of the mounting base. One end of the mounting section is rotatably connected to the mounting base through a hinge structure, and the other end is connected to the handle section. The distance between the rotation axis of the mounting section and the handle section is greater than or equal to the distance between the rotation axis and the upper edge of the box, ensuring that the handle can be retracted to the top of the box.

[0020] In the aforementioned lunchbox with a lockable handle, the mounting section of the handle is rotatably connected to the mounting base. The top of the mounting section is provided with a limiting piece that extends horizontally in a direction away from the mounting base. The upper end of a resistance-increasing piece is connected to the outer wall of the box body. The resistance-increasing piece extends obliquely downward in a direction away from the box body. The rotation paths of the resistance-increasing piece and the limiting piece partially overlap.

[0021] The limiting plate is located on the side of the mounting section away from the grip section, and the resistance-increasing plate is located below the rotation axis of the mounting section, with its lower end below the axis. When the handle is rotated towards the top of the housing, the limiting plate and the resistance-increasing plate make frictional contact, increasing rotational resistance and stopping the handle at the corresponding position, thus achieving rotational damping in the latter part of the handle's retraction stroke. Of course, both the limiting plate and the resistance-increasing plate are sheet-like and have a certain degree of elastic deformation capability.

[0022] In the aforementioned lunchbox with a lockable handle, the mounting section of the handle is rotatably connected to both sides of the mounting base and is in contact with the mounting surface of the mounting base. The mounting surface near the box body has a friction-increasing surface, and the thickness of the friction-increasing surface gradually increases along the direction close to the box body, so as to make frictional contact with the mounting section.

[0023] A resistance-increasing surface is provided on the mounting surface of the side wall of the mounting base. The resistance-increasing surface is either straight or curved. The thickness of the resistance-increasing surface from the mounting surface gradually increases along the direction close to the box body. When the handle is rotated and unfolded, especially in the later part of the rotation stroke, the mounting section begins to contact and rub against the resistance-increasing surface. The mounting section can adapt to deformation and realize rotational damping in the later part of the handle's unfolding and rotation stroke.

[0024] In the aforementioned lunchbox with a lockable handle, the lunchbox also includes a lid, which is detachably mounted on the opening of the box body; the outer end of the handle's grip section is connected to a heat-resistant extension section; the grip section has a U-shaped cross-section, and the grip section and / or the heat-resistant extension section are provided with a hollow structure.

[0025] The lid is used in conjunction with the box body to seal the container cavity. The handle and box body are generally made of metal or alloy, which has good thermal conductivity. The heat-resistant extension of the grip section can prevent burns and also extend the length of the grip section. The hollow structure and U-shaped design help to achieve the goal of lightweighting.

[0026] As an optimization, the mounting base and fixing ears are integrated into a sheet metal structure, and the locking parts are also sheet metal structures, formed by corresponding bending.

[0027] Compared with the prior art, the present invention has the following main advantages:

[0028] 1. When fully extended, the handle is basically horizontal, with the inner end face abutting against the outer wall of the box. The locking structure can limit and lock the rotation of the handle in this state, keeping it in this horizontal state. When fully retracted, the main body of the handle closes to the top of the box, making it easy to store.

[0029] 2. The mounting base is preferably square in shape. The upper part of the locking member slides within the mounting cavity, and an elastic component is provided between the top surface and the inner top surface of the mounting cavity, giving the locking member's limiting hook a downward elastic tendency. The lower part of the locking member is a connecting piece, which passes through a through hole at the bottom of the mounting cavity. The upper end of the connecting piece has a limiting hook located within the mounting cavity, and the lower end has a pressing part located outside the mounting cavity.

[0030] 3. The limiting part is bent upward and has a second limiting surface facing away from the box body. The upper end of the limiting part can slide and cooperate with the guide surface to push the locking member upward. When the handle is fully extended, the first limiting surface and the second limiting surface are opposite and attached to each other, which can restrict the reverse rotation of the handle.

[0031] 4. The handle section and the mounting section are arranged vertically. One end of the mounting section is rotatably connected to the mounting base through a hinge structure, and the other end is connected to the handle section.

[0032] 5. The limiting plate is located on the side of the mounting section away from the grip section, and the resistance-increasing plate is located below the rotation axis of the mounting section. When the handle is rotated to the top of the box, the limiting plate and the resistance-increasing plate are in close frictional contact, increasing the rotational resistance and also stopping the handle at the corresponding position, thus achieving rotational damping in the latter part of the handle's rotational stroke.

[0033] 6. A resistance-increasing surface is provided on the mounting surface of the side wall of the mounting base. The thickness of the resistance-increasing surface from the mounting surface gradually increases in the direction close to the box body. When the handle is rotated and unfolded, especially in the later part of the rotation stroke, the mounting section begins to contact and rub against the resistance-increasing surface to achieve rotational damping in the later part of the handle's unfolding and rotation stroke. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure provided by this utility model (handle in unfolded state);

[0035] Figure 2 yes Figure 1 Enlarged detail view of point A in the middle;

[0036] Figure 3 This is a cross-sectional schematic diagram of the locking structure when the handle is unfolded according to this utility model;

[0037] Figure 4 This is a schematic diagram of the overall structure provided by this utility model (handle retracted).

[0038] Figure 5 yes Figure 4 Enlarged detail view of point B in the middle;

[0039] Figure 6 This is a schematic diagram of the structure of the mounting base provided by this utility model;

[0040] Figure 7 This is a structural schematic diagram of the locking component provided by this utility model;

[0041] Figure 8 This is a schematic diagram of the structure of the inner end of the handle provided by this utility model.

[0042] In the diagram, 1 is the box body, 2 is the mounting base, 3 is the handle, 4 is the locking structure, 5 is the mounting section, 6 is the mounting cavity, 7 is the fixing ear, 8 is the locking component, 9 is the limiting hook, 10 is the elastic component, 11 is the pressing part, 12 is the connecting section, 13 is the bending section, 14 is the clearance opening, 15 is the first limiting surface, 16 is the guide surface, 17 is the limiting part, 18 is the second limiting surface, 19 is the hand grip section, 20 is the limiting piece, 21 is the resistance increasing piece, 22 is the mounting surface, 23 is the resistance increasing surface, 25 is the heat-resistant extension section, and 26 is the hollow structure. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] Specific implementation examples Figures 1-8 As shown, this lockable lunchbox includes a cylindrical box body 1. A handle 3 is rotatably connected to the side of the box body 1 via a mounting base 2. A locking structure 4 is provided between the handle 3 and the mounting base 2, which can lock the handle 3 after it is fully extended to limit its rotation.

[0045] Specifically, the main body of this lunchbox is the box body 1, which has a holding cavity inside. A handle 3 is provided on the side of the box body 1 for the user to pick up. The handle 3 can rotate along the vertical plane and unfolds when rotating away from the box body 1. In the fully unfolded state, the handle 3 is basically horizontal, and the inner end face of the handle 3 abuts against the outer wall of the box body 1. The locking structure 4 can limit and lock the rotation of the handle 3 in this state to keep it in this horizontal state. Of course, the locking structure 4 is provided with a corresponding pressing part 11, which can release the limit lock when needed. When the handle 3 rotates close to the box body 1, it retracts. In the fully retracted state, the handle grip section 19 and the heat-resistant extension section 25 of the handle 3 rotate to the top of the box body 1 for easy storage.

[0046] like Figures 1-3 As shown, the mounting section 5 of the handle 3 is hinged to the outer wall of the mounting base 2. The mounting base 2 has a mounting cavity 6, and a locking structure 4 is provided in the mounting cavity 6. The mounting base 2 is a square cylindrical structure with its opening facing the box body 1. A fixing ear 7 is provided on the outer wall of the opening, and the fixing ear 7 is attached to and fixed to the outer wall of the box body 1.

[0047] Specifically, the mounting base 2 is hollow inside, and its mounting cavity 6 extends vertically, in which the locking structure 4 is located. The mounting base 2 is a square cylinder with one end open, and the open end covers the outer wall of the box body 1. The outer wall of the open end is provided with a fixing ear 7 extending away from the mounting base 2, forming a Z-shaped structure. The fixing ear 7 is attached to the outer wall of the box body 1 and is fixed by rivets.

[0048] like Figure 3 , Figure 6As shown, the locking structure 4 includes a locking member 8 that can be vertically slidably disposed within the mounting cavity 6. The locking member 8 is provided with a downwardly bent limiting hook 9. An elastic component 10 is provided between the upper part of the locking member 8 and the inner top surface of the mounting cavity 6. The lower part of the locking member 8 extends out of the mounting cavity 6 and is provided with a pressing part 11. The limiting hook 9 includes a connecting section 12 extending in a direction away from the box body 1, and a bent section 13 extending downward at the front end of the connecting section 12. The bottom surface of the mounting cavity 6 is provided with a clearance opening 14 that allows the bent section 13 to extend downward. The bent section 13 includes a first limiting surface 15 and a guide surface 16 arranged at an acute angle. The first limiting surface 15 faces the box body 1, and the guide surface 16 faces away from the box body 1 and is inclined downward.

[0049] Specifically, the upper part of the locking member 8 is a square structure adapted to the shape of the mounting cavity 6. This upper part slides within the mounting cavity 6, and an elastic component 10 is provided between its top surface and the inner top surface of the mounting cavity 6. This elastic component 10 can be a conical spring, which applies a downward elastic force to the locking member 8, causing the limiting hook 9 of the locking member 8 to have an elastic tendency to extend downward. The lower part of the locking member 8 includes a connecting piece that slides along the outer wall of the box 1. The upper end of the connecting piece is connected to the upper part and is provided with a limiting hook 9. The lower end is provided with a pressing part 11, wherein the limiting hook 9 is located inside the mounting cavity 6, and the pressing part 11 is located outside the mounting cavity 6. A through hole for the connecting piece to pass through is provided on the bottom side of the mounting cavity 6 near the box 1. The pressing part 11 bends away from the box body 1, and there is a pressing gap between it and the bottom surface of the mounting base 2. This gap ensures that the user can press the locking member 8 upward, causing the limiting hook 9 to retract upward to release the rotation limit of the handle 3. In addition, it also avoids obstruction and interference with the inner end of the handle 3. When the handle 3 is fully extended, its inner end is located between the pressing part 11 and the mounting base 2, and there is still a gap between the pressing part 11 and the inner end of the handle 3 at this time. The limiting hook 9 is a sheet-like structure and is located in the vertical plane. The length direction of the connecting section 12 is perpendicular to the movement direction of the locking member 8. The bent section 13 is located at the end of the connecting section 12 away from the box body 1 and bends downward. The clearance opening 14 is located on the bottom surface of the mounting cavity 6 for the bent section 13 to extend downward. The lower end of the bent section 13 is at an acute angle. Its guide surface 16 is used to allow the locking member 8 to rise and make way when the handle 3 is rotated, and the first limiting surface 15 is used to limit the reverse rotation of the handle 3.

[0050] like Figure 1 , Figure 3 , Figure 7As shown, the handle 3 is L-shaped and includes a grip section 19 and a mounting section 5 that are perpendicular to each other. The mounting section 5 is plate-shaped and has two parallel sections. One end of the mounting section 5 is integrally connected to the inner end of the grip section 19, and the other end is rotatably connected to the outer wall of the mounting base 2. When the handle 3 is fully extended, the side of the mounting section 5 away from the grip section 19 abuts against the outer wall of the box body 1. The inner end of the handle 3 is provided with an upwardly bent limiting part 17, which is located between the two mounting parts and whose lower end is integrally connected to the grip section 19. During the opening of the handle 3, the top of the limiting part 17 slides along the guide surface 16, pushing the locking member 8 upward. When the handle 3 is fully opened, the limiting part 17 enters between the bent section 13 and the box body 1, and its second limiting surface 18 is in contact with the first limiting surface 15, preventing the handle 3 from reversing and closing.

[0051] Specifically, the handle section 19 and the mounting section 5 are arranged vertically. The mounting section 5 is plate-shaped and adheres to the side wall of the mounting base 2. One end of the mounting section 5 is rotatably connected to the mounting base 2 via a hinge structure, and the other end is connected to the handle section 19. The distance between the rotation axis of the mounting section 5 and the handle section 19 is greater than the distance between the mounting section 5 and the upper edge of the box body 1, ensuring that the handle 3 can be retracted to the top of the box body 1. The limiting part 17 is bent upward and has a second limiting surface 18 facing away from the box body 1. The upper end of the limiting part 17 can slide and engage with the guide surface 16 to push the locking member 8 upward. When the handle 3 is fully extended, the first limiting surface 15 and the second limiting surface 18 are opposite and adhere to each other, which can restrict the reverse rotation of the handle 3.

[0052] As an optimization of this embodiment, the mounting section 5 of the handle 3 is rotatably connected to the mounting base 2. The top of the mounting section 5 is provided with a limiting piece 20 that extends horizontally in a direction away from the mounting base 2. The upper end of the resistance-increasing piece 21 is connected to the outer wall of the box body 1. The resistance-increasing piece 21 extends obliquely downward in a direction away from the box body 1. The rotation path of the resistance-increasing piece 21 and the limiting piece 20 partially overlap.

[0053] Specifically, the limiting plate 20 is located on the side of the mounting section 5 away from the grip section 19, and the resistance-increasing plate 21 is located below the rotation axis of the mounting section 5, with its lower end below the rotation axis of the mounting section 5. When the handle 3 rotates and retracts towards the top of the housing 1, the limiting plate 20 and the resistance-increasing plate 21 make frictional contact and adhere tightly, increasing the rotational resistance and also stopping the handle 3 at the corresponding position, thus achieving rotational damping in the latter part of the retraction stroke of the handle 3. Of course, the limiting plate 20 and the resistance-increasing plate 21 are sheet-like and have a certain elastic deformation capability.

[0054] As an optimization of this embodiment, the mounting section 5 of the handle 3 is rotatably connected to both sides of the mounting base 2 and is in contact with the mounting surface 22 of the mounting base 2. The mounting surface 22 is provided with a resistance-increasing surface 23 on the side near the box 1. The thickness of the resistance-increasing surface 23 gradually increases along the direction close to the box 1, so that it can rub against the mounting section 5.

[0055] Specifically, a resistance-increasing surface 23 is provided on the mounting surface 22 on the side wall of the mounting base 2. The resistance-increasing surface 23 is arc-shaped, and the thickness of the resistance-increasing surface 23 from the mounting surface 22 gradually increases along the direction close to the box body 1. When the handle 3 is rotated and unfolded, especially in the later part of the rotation stroke, the mounting section 5 begins to contact and rub against the resistance-increasing surface 23. The mounting section 5 can elastically deform to realize the rotational damping of the later part of the stroke of the handle 3 when it is unfolded and rotated.

[0056] Furthermore, the lunchbox also includes a lid, which is detachably placed on the opening of the box body 1; the handle 3 has a heat-resistant extension section 25 connected to the outer end of the grip section 19; the cross-section of the grip section 19 is U-shaped, and the grip section 19 and the heat-resistant extension section 25 are provided with a hollow structure 26.

[0057] Specifically, the lid is used in conjunction with the body 1 to seal the container cavity. The handle 3 and the body 1 are made of alloy material, which has good thermal conductivity. The heat-resistant extension section 25 of the grip section 19 is made of plastic, which can prevent burns and also extend the length of the grip section 19. The hollow structure 26 and the U-shaped design help to achieve the goal of lightweighting.

[0058] Specific working principle: During the unfolding and rotation of the handle 3, the front end of the limiting part 17 contacts the guide surface 16, pushing the locking part 8 upward, overcoming the elastic force of the elastic component 10. After passing the lowest position of the guide surface 16, the limiting part 17 enters the bending section 13, and the handle 3 is fully unfolded. At this time, the front end of the mounting section 5 abuts against the fixing ear 7, and the second limiting surface 18 is opposite to and attached to the first limiting surface 15, restricting the reverse rotation of the handle 3. In the later part of the rotation stroke, the inner side of the mounting section 5 slides along the mounting surface 22 of the mounting base 2, and the front end slowly slides onto the resistance-increasing surface 23. As the thickness increases, the mounting section 5 elastically deforms, and frictional resistance is generated between the mounting section 5 and the resistance-increasing surface 23, generating rotational damping.

[0059] When the handle 3 needs to be retracted and rotated, the user presses the pressing part 11 upwards, the locking part 8 rises, the first limiting surface 15 rises and releases its contact with the second limiting surface 18, at this time the handle 3 can be rotated by slightly overcoming the rotational damping. In the later part of the rotation stroke, the limiting piece 20 and the resistance increasing piece 21 slide into contact, the limiting piece 20 and the resistance increasing piece 21 elastically deform, and frictional resistance is generated between the two, that is, the rotational damping of the handle 3 is generated.

[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A lunchbox with a lockable handle, comprising a cylindrical body (1), characterized in that, The side of the box (1) is rotatably connected to a handle (3) via a mounting base (2). A locking structure (4) is provided between the handle (3) and the mounting base (2), which can lock the handle (3) after it is fully extended to limit rotation. The mounting section (5) of the handle (3) is hinged to the outer wall of the mounting base (2). A mounting cavity (6) is formed in the mounting base (2), and the locking structure (4) is provided in the mounting cavity (6). The locking structure (4) includes a locking member (8) that can be vertically slidably disposed in the mounting cavity (6). The locking member (8) is provided with a downwardly bent limiting hook (9). An elastic component (10) is provided between the upper part of the locking member (8) and the inner top surface of the mounting cavity (6). The lower part of the locking member (8) extends out of the mounting cavity (6) and is provided with a pressing part (11). The inner end of the handle (3) is provided with an upwardly bent limiting part (17), which can cooperate with the limiting hook (9) to limit the rotation of the handle (3).

2. The lunchbox with a lockable handle according to claim 1, characterized in that, The mounting base (2) is a square cylindrical structure with the opening facing the box (1). The outer wall of the opening is provided with a fixing ear (7), which is attached to and fixed to the outer wall of the box (1).

3. The lunchbox with a lockable handle according to claim 1, characterized in that, The limiting hook (9) includes a connecting section (12) extending in a direction away from the box (1) and a bent section (13) extending downward at the front end of the connecting section (12). The bottom surface of the mounting cavity (6) is provided with a clearance opening (14) that allows the bent section (13) to extend downward. The bending section (13) includes a first limiting surface (15) and a guide surface (16) arranged at an acute angle. The first limiting surface (15) faces the box body (1), and the guide surface (16) faces away from the box body (1) and is inclined downward.

4. The lunchbox with a lockable handle according to claim 3, characterized in that, During the opening of the handle (3), the top of the limiting part (17) slides along the guide surface (16) and pushes the locking part (8) upward; after the handle (3) is fully opened, the limiting part (17) enters between the bending section (13) and the box (1), and its second limiting surface (18) is in contact with the first limiting surface (15), restricting the handle (3) from reversing and closing.

5. The lunchbox with a lockable handle according to any one of claims 1-4, characterized in that, The handle (3) is L-shaped and includes a grip section (19) and a mounting section (5) that are perpendicular to each other. The mounting section (5) is plate-shaped and has two parallel sections. One end of the mounting section (5) is integrally connected to the inner end of the grip section (19), and the other end is rotatably connected to the outer wall of the mounting base (2). When the handle (3) is fully extended, the side of the mounting section (5) away from the grip section (19) abuts against the outer wall of the box body (1).

6. The lunchbox with a lockable handle according to any one of claims 1-4, characterized in that, The mounting section (5) of the handle (3) is rotatably connected to the mounting base (2). The top of the mounting section (5) is provided with a limiting piece (20) extending horizontally in a direction away from the mounting base (2). The upper end of the resistance-increasing piece (21) is connected to the outer wall of the box (1). The resistance-increasing piece (21) extends obliquely downward in a direction away from the box (1). The rotation path of the resistance-increasing piece (21) and the limiting piece (20) partially overlap.

7. The lunchbox with a lockable handle according to any one of claims 1-4, characterized in that, The mounting section (5) of the handle (3) is rotatably connected to both sides of the mounting base (2) and is in contact with the mounting surface (22) of the mounting base (2). The mounting surface (22) has a resistance-increasing surface (23) on the side near the box (1). The thickness of the resistance-increasing surface (23) gradually increases along the direction close to the box (1) so that it can rub against the mounting section (5).

8. The lunchbox with a lockable handle according to any one of claims 1-4, characterized in that, The lunchbox also includes a lid, which is detachably placed over the opening of the box body (1); The outer end of the grip section (19) of the handle (3) is connected to a heat-resistant extension section (25). The hand grip section (19) has a U-shaped cross-section, and the hand grip section (19) and / or the heat-resistant extension section (25) are provided with a hollow structure (26).

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