A double-walled box

Abstract

This utility model discloses a double-walled box, belonging to the field of display accessory technology. It includes an outer shell, an inner shell, an inner end cover, an outer end cover, and a hinge. The outer shell is connected to the outer end cover by the hinge. The inner shell is disposed inside the outer shell and has a groove for storing items. The inner end cover is disposed inside the outer end cover. When the outer shell and the outer end cover are closed, the groove inside the inner shell becomes a closed cavity. The double-walled box can effectively suppress deformation, improve protection, and enhance the feel of use.

Description

Technical Field

[0001] This utility model relates to the field of display accessory technology, specifically to a double-walled box. Background Technology

[0002] Currently, packaging containers on the market, such as pencil cases and precision instrument cases, are generally manufactured using a two-stage injection molding process, also known as overmolding. This process involves covering a rigid plastic inner shell with a soft plastic layer to improve tactile feel and protection. The opening and closing mechanism of these products primarily relies on the deformation of the rigid plastic components to achieve a snap-fit ​​connection, or on a locking mechanism through a snap-fit ​​design on the top and bottom lids. The former requires the rigid plastic components to undergo continuous elastic deformation during repeated opening and closing, but rigid materials have limited deformation recovery capabilities, which can easily lead to plastic deformation or even breakage with long-term use. While the latter provides a clear tactile feel when opening and closing, it... The snap fasteners require extremely high dimensional accuracy; even slight deviations can cause them to be too tight or loose. Furthermore, the internal stress generated by the cooling and shrinkage of the soft rubber during the secondary overmolding process is directly transmitted to the hard rubber component, forcing it to twist, dent, or warp. This deformation cannot be effectively corrected, leading to the following product defects: deformation of the hard rubber component causes unevenness, misalignment, and other aesthetic flaws on the surface of the soft rubber outer layer; deformation leads to poor sealing after the lid is closed, resulting in the failure of dust and moisture protection; and deformation of the snap fastener structure causes abnormal wear or engagement failure, reducing its lifespan. Therefore, a box that can effectively improve stress during molding and provide stable closure is needed. Utility Model Content

[0003] The purpose of this invention is to provide a double-walled box that solves the problems of unstable dimensions, easy deformation under stress, and unstable fastening of existing boxes.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0005] A double-walled box includes an outer shell, an inner shell, an inner end cap, an outer end cap, and a hinge. The outer shell is connected to the outer end cap by the hinge. The inner shell is disposed inside the outer shell and has a groove for storing items. The inner end cap is disposed inside the outer end cap. When the outer shell and the outer end cap are closed, the groove inside the inner shell becomes a closed cavity. The double-walled box can effectively suppress deformation, improve protection, and enhance the feel of use.

[0006] Furthermore, it also includes a first magnetic force assembly. The outer wall of the inner shell is provided with a plurality of first slots. The first magnetic force assembly includes a plurality of first magnets, which are arranged one-to-one in the first slots to provide pressure for closing the lid.

[0007] Furthermore, it also includes a second magnetic force assembly. The lower end surface of the inner end cover is provided with multiple second slots and multiple third slots. The multiple second slots are located near the edge of the inner end cover, and the multiple third slots are located in the middle of the inner end cover. The second magnetic force assembly includes multiple second magnets and multiple third magnets. The second magnets are arranged one-to-one in the second slots, and the third magnets are arranged one-to-one in the third slots. The magnetic poles of the first magnet, the second magnet, and the third magnet are opposite to each other on their opposite sides. The magnetic force is converted into the pressure for closing the cover through non-contact magnetic force. It has no wear after long-term use and has strong sealing performance at the gaps.

[0008] Preferably, the first magnet and the second magnet are the same size, and the size of the first magnet and the second magnet is smaller than that of the third magnet, so as to ensure that the pressure at the joint is uniform and the pressure of closing the lid can be changed by the number of magnets.

[0009] Even better, the first magnet, the second magnet, and the third magnet are arranged along the length of the groove, and their uniform distribution can provide uniform pressure, thereby improving the sealing performance.

[0010] Furthermore, a first stepped groove is provided at the upper edge of the inner shell. After the inner shell is connected to the outer shell, a first annular groove is formed between the first stepped groove and the upper edge of the outer shell to absorb deformation and improve the sealing degree of the joint.

[0011] Furthermore, a second stepped groove is provided at the edge of the inner end cover. After the inner end cover is connected to the outer end cover, a second annular groove is formed between the second stepped groove and the outer end cover to absorb deformation and improve the sealing degree of the joint.

[0012] Furthermore, the outer shell and the outer end cap are made of soft material, while the inner shell and the inner end cap are made of hard material. The transition between the side walls and the bottom wall of the groove is set in an arc shape, which can improve the feel of contact and continuously apply pressure, making the box structure stable.

[0013] Preferably, the inner end cap protrudes into the groove from the end face facing the groove to prevent and restrict the movement of the internal items.

[0014] Preferably, the hinge is a plastic-molded hinge, which is easy to mold and opens and closes silently, providing a good user experience.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) The double-walled box is closed by connecting the inner shell and the inner end cover on the one-piece molded outer shell and the outer end cover with the one-piece molded hinge, so that the groove on the inner shell becomes a closed cavity, which is convenient to close and forms a sealed whole after closing, with strong waterproof ability.

[0017] (2) The double-walled box has a magnetic assembly embedded in the inner shell wall. The magnetic assembly between the inner shell and the inner end cover generates a uniform magnetic attraction when closed, which can counteract the tensile stress of the soft rubber on the hard rubber parts due to the cooling and shrinkage, and force the twisted and deformed parts to be corrected and reset, avoiding the structural defects caused by the deformation of the hard rubber parts in the traditional process. In addition, the hard ring groove formed by the stepped groove of the inner shell and the outer shell, together with the ring groove formed by the stepped groove of the inner end cover and the soft rubber of the outer end cover, is used for the deformation of the flexible shell when sealing. Under the drive of the magnetic force, the flexible outer end cover and the outer shell are squeezed to close the gap of the cavity, and there is a certain continuous pressure at the closed gap, which eliminates the surface unevenness caused by the traditional snap-fit ​​structure and improves the sealing performance. Attached Figure Description

[0018] Figure 1 Exploded view of the double-walled box provided for this utility model;

[0019] Figure 2 Assembly process diagram of the double-walled box provided by this utility model;

[0020] Figure 3 A front view of the double-walled box provided by this utility model;

[0021] Figure 4 A side view of the double-walled box provided by this utility model;

[0022] Figure 5 Diagram showing the opening and closing states of the double-walled box provided by this utility model.

[0023] Figure label:

[0024] 1. Outer shell; 11. Inner cavity; 12. First annular groove; 2. First magnetic assembly; 3. Inner shell; 31. First slot; 32. First stepped groove; 33. Groove; 4. Second magnetic assembly; 41. Second magnet; 42. Third magnet; 5. Inner end cap; 51. Second slot; 52. Third slot; 53. Second stepped groove; 54. Second annular groove; 6. Outer end cap; 7. Hinge. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] Example 1

[0027] like Figures 1-5As shown, this embodiment discloses a double-walled box, including an outer shell 1, an inner shell 3, an inner end cap 5, an outer end cap 6, and a hinge 7. The outer shell 1 is connected to the outer end cap 6 by the hinge 7. The inner shell 3 is disposed inside the outer shell 1 and has a groove 33 for storing items. The inner end cap 5 is disposed inside the outer end cap 6. When the outer shell 1 and the outer end cap 6 are closed, the groove 33 in the inner shell 3 becomes a closed cavity. The inner end cap 5 and the outer end cap 6 are connected by an interference fit, and the outer shell 1 and the inner shell 3 are also connected by an interference fit. By applying pressure to the inside through the outer shell 1 and the outer end cap 6, deformation can be prevented during long-term use. The box can be magnetically attached to a metal casing such as a monitor for convenient placement of items.

[0028] Specifically, the outer shell 1 has an inner cavity 11, and an inner shell 3 is embedded in the inner cavity 11. The groove 33 on the inner shell 3 can accommodate items.

[0029] Furthermore, it also includes a first magnetic force group 2. The outer wall of the inner shell 3 is provided with a plurality of first slots 31. The first magnetic force group 2 includes a plurality of first magnets. The first magnets are arranged one-to-one in the first slots 31. The first magnets are arranged near the edge of the opening of the inner shell 3 to provide pressure for closing and sealing. Specifically, the plurality of first magnets are evenly distributed to achieve the effect of applying uniform pressure.

[0030] Furthermore, it also includes a second magnetic assembly 4. The lower end surface of the inner end cover 5 is provided with multiple second slots 51 and multiple third slots 52. The multiple second slots 51 are located near the edge of the inner end cover 5, and the multiple third slots 52 are located in the middle of the inner end cover 5. The second magnetic assembly 4 includes multiple second magnets 41 and multiple third magnets 42. The second magnets 41 are correspondingly arranged in the second slots 51, and the third magnets 42 are correspondingly arranged in the third slots 52. Specifically, the magnets are embedded in the slots. The magnetic poles of the opposite faces of the first magnet and the second magnets 41 and the third magnets 42 are opposite, and the applied pressure is stable. The second magnets 41 and the third magnets 42 are evenly distributed on the inner end cover 5 and generate mutual attraction with the first magnet. The magnetic force is used to apply pressure to close the box. The magnetic force has no physical effect and is not easily worn after repeated use, and the locking is stable. In addition, the interacting magnetic force counteracts the tensile stress on the hard plastic parts by the cooling and shrinkage of the soft plastic, thereby suppressing the deformation of the box.

[0031] Preferably, the first magnet and the second magnet 41 are the same size, and the size of the first magnet and the second magnet 41 is smaller than that of the third magnet 42, so that the magnetic force is uniform and sufficient. The third magnet 42 is used to supplement the magnetic force of the closure. Changing the number of third magnets 42 can adjust the pressure at the closure gap of the box and adjust the sealing performance.

[0032] More preferably, the first magnet, the second magnet 41, and the third magnet 42 are arranged along the length of the groove 33, and the cross-sections of the first magnet, the second magnet 41, and the third magnet 42 are all rectangular or circular. The multiple first magnets and the multiple second magnets 41 are arranged at intervals, which can provide uniform and stable pressure for the box to be attracted together, so that the contact between the outer shell 1 and the inner shell 3 is deformed and pressed together by magnetic force, and pressure is continuously applied to the seam to achieve zero gap closure and play a role in preventing water leakage.

[0033] Furthermore, a first stepped groove 32 is provided at the upper edge of the inner shell 3. After the inner shell 3 is connected to the outer shell 1, a first annular groove 12 is formed between the first stepped groove 32 and the upper edge of the outer shell 1. The outer shell 1 is squeezed by magnetic force and enters into the first stepped groove 32, making the joint contact more uniform, enhancing the sealing of the gap after the cover is closed, and absorbing the error generated during installation.

[0034] Furthermore, a second step groove 53 is provided at the edge of the inner end cover 5. After the inner end cover 5 is connected to the outer end cover 6, a second annular groove 54 is formed between the second step groove 53 and the outer end cover 6. The part of the outer end cover 6 that is squeezed by magnetic force enters the second step groove 53, making the joint contact more uniform, enhancing the sealing performance of the gap after the cover is closed, and absorbing the errors generated during installation.

[0035] Furthermore, the outer shell 1 and the outer end cap 6 are made of soft material, while the inner shell 3 and the inner end cap 5 are made of hard material. The transition between the two side walls and the bottom wall of the groove 33 is set in an arc shape. The soft material outer shell 1 and the outer end cap 6 respectively wrap the hard material inner shell 3 and the inner end cap 5, applying inward pressure to the hard part inside, preventing the box from deforming and improving the tactile feel of contacting the box and the sealing of the gaps. The long-term performance is stable.

[0036] Preferably, the inner end cap 5 protrudes into the groove 33 from the end face facing the groove 33 to fix the items stored inside and prevent the items from hitting the seam, so as to make the box close stably.

[0037] Preferably, the hinge 7 is a plastic molded hinge. The molded hinge 7 has a simple structure and small size, which prevents the outer shell 1 and the inner shell 3 from separating during use and makes it convenient to use.

[0038] The assembly process of this double-walled box is as follows:

[0039] See Figure 2Place the inner shell 3 and inner end cap 5 in opposite directions on the table. Then, insert the first magnet, the second magnet 41, and the third magnet 42 into the first slot 31, the second slot 51, and the third slot 52 in sequence, so that the outward magnetic poles of the first magnet are different from the outward magnetic poles of the second magnet 41 and the third magnet 42. Take the outer shell 1 and the outer end cap 6, which are integrally formed from soft material, and put them on the outside of the inner shell 3 and the inner end cap 5 to form an interference fit. Apply pressure inward to the outer shell 1 and the outer end cap 6 to fix each magnet in place. Push the outer end cap 6 to rotate around the hinge 7 to close the groove 33.

[0040] Example 2

[0041] This embodiment also discloses a double-walled box, which differs from Embodiment 1 in that the first magnet and the second magnet 41 are annular flexible magnetic strips around the opening of the box, which can make the magnetic force of attraction more uniform and stable.

[0042] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and any modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A double-walled box, characterized in that: The device includes an outer shell (1), an inner shell (3), an inner end cap (5), an outer end cap (6), and a hinge (7). The outer shell (1) is connected to the outer end cap (6) by the hinge (7). The inner shell (3) is disposed inside the outer shell (1). The inner shell (3) has a groove (33) for storing objects. The inner end cap (5) is disposed inside the outer end cap (6). When the outer shell (1) and the outer end cap (6) are closed, the groove (33) inside the inner shell (3) becomes a closed cavity.

2. The double-walled box according to claim 1, characterized in that: It also includes a first magnetic force group (2), and the outer wall of the inner shell (3) is provided with a plurality of first slots (31). The first magnetic force group (2) includes a plurality of first magnets, and the first magnets are arranged one-to-one in the first slots (31).

3. The double-walled box according to claim 2, characterized in that: It also includes a second magnetic assembly (4). The lower end surface of the inner end cover (5) is provided with a plurality of second slots (51) and a plurality of third slots (52). The plurality of second slots (51) are arranged near the edge of the inner end cover (5), and the plurality of third slots (52) are arranged in the middle of the inner end cover (5). The second magnetic assembly (4) includes a plurality of second magnets (41) and a plurality of third magnets (42). The second magnets (41) are arranged one-to-one in the second slots (51), and the third magnets (42) are arranged one-to-one in the third slots (52). The magnetic poles of the first magnet and the opposite surfaces of the second magnets (41) and the third magnets (42) are different.

4. The double-walled box according to claim 3, characterized in that: The first magnet and the second magnet (41) are the same size, and the size of the first magnet and the second magnet (41) is smaller than that of the third magnet (42).

5. The double-walled box according to claim 4, characterized in that: The first magnet, the second magnet (41) and the third magnet (42) are arranged along the length direction of the groove (33).

6. The double-walled box according to claim 1, characterized in that: The inner shell (3) has a first stepped groove (32) at its upper edge. After the inner shell (3) is connected to the outer shell (1), a first annular groove (12) is formed between the first stepped groove (32) and the upper edge of the outer shell (1).

7. The double-walled box according to claim 6, characterized in that: The inner end cap (5) has a second step groove (53) at its edge. After the inner end cap (5) is connected to the outer end cap (6), a second annular groove (54) is formed between the second step groove (53) and the outer end cap (6).

8. The double-walled box according to claim 1, characterized in that: The outer shell (1) and the outer end cap (6) are made of soft material, the inner shell (3) and the inner end cap (5) are made of hard material, and the transition between the two side walls and the bottom wall of the groove (33) is set in an arc shape.

9. The double-walled box according to claim 8, characterized in that: The inner end cap (5) protrudes into the groove (33) from the end face facing the groove (33).

10. The double-walled box according to any one of claims 1-9, characterized in that: The hinge (7) is a plastic-molded hinge.

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