Leakage-proof magnetic type heat preservation kettle
By introducing a magnetic assembly consisting of a partition and a limiting block into a leak-proof magnetic thermos, and utilizing the bonding between neodymium iron boron magnets and the limiting block to achieve large-area adsorption, the stability problem caused by the small contact area of the magnetic attraction point is solved, thus improving the firmness and reliability of the bottle cap.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OUDI HOME APPLIANCES (SHENZHEN) CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-21
AI Technical Summary
Existing leak-proof magnetic thermos flasks have small magnetic contact surfaces and uneven magnetic force distribution, which makes the lid easy to loosen or fall off. They are particularly unstable when filled with liquid, posing a risk of tipping over.
A magnetic attraction assembly was designed, which includes a partition inside the bottle cap and a limiting block. The magnet is set on the inner wall of the partition, and the limiting block is set on the bottle stopper. Large-area adsorption is achieved by the contact of multiple ring-distributed neodymium iron boron magnets with the limiting block. Combined with threaded connection and sealing ring, the bottle cap is stably fixed to the bottle body.
It improves the firmness and stability of the bottle cap and bottle body, prevents liquid leakage, enhances the reliability and safety of use, and is suitable for bottle cap structures that require magnetic positioning.
Smart Images

Figure CN224140643U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thermos flask technology, and in particular to a leak-proof magnetic thermos flask. Background Technology
[0002] The thermos, also known as a hot water bottle or insulated bottle, was invented by the English scientist Dewar. It was made by coating a layer of silver or reflective paint inside a vacuum chamber to block heat radiation, and then sealing the bottle opening with a stopper. In this way, all three modes of heat conduction are cut off, and the outer liner can maintain the temperature for a long time. He used this kind of bottle to store liquid hydrogen, and it has been widely used. Almost every household has a thermos or hot water bottle.
[0003] Existing leak-proof magnetic thermos flasks use a magnetic structure to secure the lid to the body. However, the magnetic point is usually located at the interface between the bottom of the lid and the body. Due to the small contact area, the magnetic force is unevenly distributed. When the user lifts the lid, the localized magnetic attraction is insufficient to provide enough support, easily causing the lid to loosen or even fall off. Especially when the flask is filled with liquid, the increased weight further weakens the magnetic stability, posing a risk of tipping over. While this design simplifies opening and closing, the insufficient magnetic contact area affects overall stability. The magnet layout needs to be optimized or an auxiliary locking structure added to improve reliability. Utility Model Content
[0004] The main purpose of this invention is to propose a leak-proof magnetic thermos, which aims to solve the technical problem that the existing thermos has a small contact surface and uneven magnetic force distribution, affecting the overall stability.
[0005] To achieve the above objectives, the present invention proposes a leak-proof magnetic thermos, comprising a bottle body, an inner bottle liner inside the bottle body, a bottle mouth connected to the bottle body above the inner bottle liner, a bottle stopper on the inner wall of the bottle mouth, a bottle cap on the top of the bottle body, and magnetic components on the bottle stopper and the bottle cap.
[0006] The magnetic attraction assembly includes a partition, a magnet, and a limiting block. The partition is located inside the bottle cap, the magnet is located on the inner wall of the partition, and the limiting block is located on the bottle stopper.
[0007] Optionally, the inner wall curvature of the bottle cap matches the upper curvature of the limiting block.
[0008] Optionally, the magnet is a neodymium iron boron magnet.
[0009] Optionally, the number of magnets is multiple, and the multiple magnets are distributed in a ring around the top of the bottle cap.
[0010] Optionally, the limiting block is made of stainless steel.
[0011] Optionally, the outer side of the bottle stopper is provided with a first thread, and the inner wall of the bottle mouth is provided with a second thread, and the outer side of the bottle stopper is threadedly connected to the inner wall of the bottle mouth.
[0012] Optionally, a sealing ring is provided on the outer side of the bottle stopper.
[0013] Optionally, a handle is provided on the outside of the bottle body.
[0014] The technical solution of this utility model has the following beneficial effects: When it is necessary to seal the bottle mouth, the bottle stopper is placed inside the bottle mouth and screwed on. Through the threaded connection of thread one and thread two, the bottle stopper and the sealing ring seal the inside of the bottle liner, preventing the liquid inside the bottle liner from leaking out. When it is necessary to limit and fix the bottle cap to the bottle body, the bottle cap is snapped onto the bottle body, so that the inner wall of the bottle cap fits against the outer surface of the limiting block, thereby allowing the magnet to be attracted to the limiting block, so that the bottle cap and the bottle body achieve stable fixation. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of a leak-proof magnetic thermos according to an embodiment of the present invention;
[0017] Figure 2 This is a front view of a leak-proof magnetic thermos according to an embodiment of the present invention;
[0018] Figure 3 for Figure 2 A magnified view of a portion of the image;
[0019] Figure 4 This is a right view of a leak-proof magnetic thermos according to an embodiment of the present invention.
[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0021] Reference numerals: 1. Bottle body; 2. Bottle liner; 3. Bottle mouth; 4. Bottle stopper; 5. Bottle cap; 6. Magnetic assembly; 61. Divider; 62. Magnet; 63. Limiting block; 7. Thread 1; 8. Thread 2; 9. Sealing ring; 10. Handle. Detailed Implementation
[0022] 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 of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0025] This utility model proposes a leak-proof magnetic thermos.
[0026] like Figures 1 to 4 As shown, in one embodiment of this utility model, the leak-proof magnetic thermos includes a bottle body 1, a bottle liner 2 inside the bottle body 1, a bottle mouth 3 connected to the bottle body 1 above the bottle liner 2 between the bottle body 1 and the bottle mouth 3, a bottle stopper 4 on the inner wall of the bottle mouth 3, a bottle cap 5 on the top of the bottle body 1, and a magnetic component 6 on the bottle stopper 4 and the bottle cap 5.
[0027] The magnetic suction assembly 6 includes a partition 61, a magnet 62, and a limiting block 63. The partition 61 is located inside the bottle cap 5, the magnet 62 is located on the inner wall of the partition 61, and the limiting block 63 is located on the bottle stopper 4.
[0028] Specifically, the inner wall curvature of the bottle cap 5 matches the upper curvature of the limiting block 63, and the inner wall of the bottle cap 5 matches at least one-third of the outer side of the limiting block 63. Under the action of the magnet 62, the bottle cap 5 can be easily and extensively adsorbed onto the limiting block 63, ensuring that the bottle cap 5 is firmly adsorbed onto the bottle body 1, and preventing the bottle cap 5 from separating from the bottle body 1 when held by hand, causing it to fall or tip over.
[0029] Specifically, magnet 62 is a neodymium iron boron magnet, which is a powerful magnet. Magnet 62 can be easily attracted to the limiting block 63 through the wall thickness of the bottle cap 5.
[0030] Specifically, there are multiple magnets 62, which are arranged in a ring around the top of the bottle cap 5. Preferably, in this embodiment, there are eight magnets 62, which are evenly distributed to facilitate uniform adsorption between the inner wall of the bottle cap 5 and the limiting block 63 on the bottle stopper 4.
[0031] Specifically, the limiting block 63 is made of stainless iron, and its main function is to precisely limit the magnet 62 on the bottle cap 5. The stainless iron material has both corrosion resistance and magnetic conductivity, which can ensure the stability of long-term use and effectively attract the magnet 62 to prevent it from shifting or falling off. This design has a simple structure and is easy to install. It can be widely used in bottle cap structures that require magnet positioning to improve the reliability and service life of the product. Through the constraint of the limiting block 63, the magnet 62 can always maintain the correct position, thereby ensuring the functionality and sealing of the bottle cap 5.
[0032] Specifically, the outer side of the bottle stopper 4 is provided with thread 7, and the inner wall of the bottle mouth 3 is provided with thread 8, and the outer side of the bottle stopper 4 is threadedly connected to the inner wall of the bottle mouth 3.
[0033] Specifically, the bottle stopper 4 has a sealing ring 9 on its outer side. The sealing ring 9 of the bottle stopper 4 in the thermos mainly serves to seal and keep the temperature. It is usually made of high-temperature resistant and elastic silicone or rubber material, which fits tightly against the gap between the bottle stopper 4 and the bottle mouth 3, effectively preventing heat loss and the entry of outside air, thereby extending the heat preservation time. At the same time, the sealing ring 9 can also reduce the risk of liquid leakage, ensuring that it is not easy to spill when carrying or pouring. Its durability and flexibility ensure that it can still maintain good sealing performance after long-term use, and it is one of the key components for the thermos to maintain efficient heat preservation.
[0034] Specifically, a handle 10 is provided on the outer side of the bottle body 1. The handle 10 of the thermos mainly serves to facilitate gripping and prevent burns. Its design conforms to ergonomics, making it easy to hold with one or two hands, and making pouring water and carrying more stable and effortless. At the same time, the handle 10 is usually made of heat-insulating materials such as plastic, silicone, wood, or a hollow structure to reduce heat conduction from the body of the thermos and prevent burns. While ensuring safety, the handle enhances the practicality and user experience of the thermos.
[0035] Specifically, the working principle and usage process of this utility model are as follows:
[0036] When it is necessary to seal the bottle mouth 3, the bottle stopper 4 is placed inside the bottle mouth 3 and screwed in. Through the threaded connection of thread 1 7 and thread 2 8, the bottle stopper 4 and the sealing ring 9 seal the inside of the bottle liner 2, preventing the liquid inside the bottle liner 2 from leaking out. When it is necessary to limit and fix the bottle cap 5 to the bottle body 1, the bottle cap 5 is fastened onto the bottle body 1, so that the inner wall of the bottle cap 5 is in contact with the outer surface of the limiting block 63, thereby allowing the magnet 62 to be attracted to the limiting block 63, so that the bottle cap 5 and the bottle body 1 can be stably fixed.
[0037] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A magnetic leakage-proof vacuum flask, characterized in that, The bottle includes a bottle body (1), a bottle liner (2) is provided inside the bottle body (1), a bottle mouth (3) connected to the bottle body (1) is provided above the bottle liner (2), a bottle stopper (4) is provided on the inner wall of the bottle mouth (3), a bottle cap (5) is provided above the bottle body (1), and a magnetic suction component (6) is provided on the bottle stopper (4) and the bottle cap (5). The magnetic suction assembly (6) includes a partition (61), a magnet (62) and a limiting block (63). The partition (61) is located inside the bottle cap (5), the magnet (62) is located on the inner wall of the partition (61), and the limiting block (63) is located on the bottle stopper (4).
2. The magnetic leakage-proof vacuum flask according to claim 1, characterized in that, The inner wall curvature of the bottle cap (5) is in contact with the upper curvature of the limiting block (63).
3. The magnetic leakage-proof vacuum flask according to claim 1, characterized in that, The magnet (62) is a neodymium iron boron magnet.
4. The magnetic leak-proof vacuum flask according to claim 1, characterized in that, The number of magnets (62) is multiple, and the multiple magnets (62) are distributed in a ring around the top of the bottle cap (5).
5. The magnetic leak-proof vacuum flask according to claim 1, characterized in that, The limiting block (63) is made of stainless iron.
6. The magnetic leak-proof vacuum flask according to claim 1, characterized in that, The bottle stopper (4) has a thread 1 (7) on its outer side and a thread 2 (8) on the inner wall of the bottle mouth (3). The outer side of the bottle stopper (4) is threadedly connected to the inner wall of the bottle mouth (3).
7. The magnetic leak-proof vacuum flask according to claim 1, characterized in that, The bottle stopper (4) is provided with a sealing ring (9) on the outside.
8. The leak-proof magnetic thermos flask according to claim 1, characterized in that, The bottle body (1) is provided with a handle (10) on the outside.