Heat preservation kettle

Abstract

The thermos flask comprises a flask body and a flask cover assembly, the flask cover assembly is provided with a water outlet channel, and a control part is movably connected with the flask body and is in linkage with a water sealing cover; the kettle cover further comprises a dustproof cover, the dustproof cover is movably connected to the cover body, the dustproof cover is provided with a first position for covering the kettle mouth and a second position for opening the kettle mouth, and the dustproof cover can be switched between the first position and the second position. The control piece is provided with a third position enabling the water sealing cover to open the water outlet channel and a fourth position enabling the water sealing cover to close the water outlet channel, and the control piece can be switched between the third position and the fourth position. When the control piece is located at the third position, the control piece abuts against the dustproof cover so that the dustproof cover can be kept at the second position. When the control piece is located at the fourth position, the control piece relieves limitation on the dustproof cover located at the second position, so that the dustproof cover can be freely switched between the first position and the second position. According to the heat preservation kettle, when water pouring is finished, the dust cover can be prevented from blocking water discharged finally, and the situation that the water is splashed all around can be avoided.

Description

Technical Field

[0001] This application relates to the field of kettle technology, specifically to a thermos. Background Technology

[0002] Thermos flasks are widely used in daily life, primarily for keeping hot water warm. With the increasing emphasis and promotion of healthy drinking water concepts, users have more and more demands for the structure and function of thermos flasks. Although thermos flasks on the market vary in structure and shape, most include a body with a spout and a lid assembly attached to the body. The lid assembly uses a push-button dispensing method and specifically includes a lid body, a control component, and a sealing cap. The lid body has a water outlet channel connecting the body and the spout. The control component is movably connected to the lid body and linked to the sealing cap. The control component opens the water outlet channel by lowering the sealing cap, allowing water to flow out of the body through the outlet channel and the spout.

[0003] Existing kettle lid assemblies also include a dust cover, which closes the spout to prevent dust, insects, and other contaminants from entering the kettle. When pouring water, a control mechanism simultaneously opens the spout by opening the water outlet with the sealing cap and opening the spout with the dust cover. The control mechanism and dust cover are often linked, operating synchronously. When the control mechanism is pressed down, the dust cover opens the spout; when the control mechanism returns to its original position, the dust cover closes the spout. However, when finishing pouring, the user often releases the control mechanism slightly before straightening the kettle. During this brief period when the dust cover closes the spout, the kettle remains tilted. Some water remains in the outlet and spout, and this water continues to flow out through the spout due to gravity and inertia. This water is then blocked and squeezed by the rapidly moving dust cover, causing it to splash outwards, resulting in a poor user experience. Furthermore, after the dust cover is closed, some water will remain between the inlet of the water outlet and the spout. This water cannot be kept warm and will turn into room temperature water, affecting the temperature of the water poured out later. Utility Model Content

[0004] This application provides a thermos flask to improve the technical problem of water splashing in all directions when the water is poured out due to the integrated design of the control and dust cover in existing thermos flasks.

[0005] The technical solution adopted in this application is as follows:

[0006] A thermos includes a body with a spout and a lid assembly attached to the body. The lid assembly includes a lid body, a control component, and a sealing cap. The lid body has a water outlet channel connecting the body and the spout. The control component is movably connected to the lid body and is linked to the sealing cap. The lid also includes a dust cover for opening or closing the spout. The dust cover is movably connected to the lid body and has a first position covering the spout and a second position opening the spout. The dust cover can be switched between the first and second positions. The control component has a third position for opening the water outlet channel with the water sealing cover and a fourth position for closing the water outlet channel with the water sealing cover. The control component can switch between the third position and the fourth position. When the control component is in the third position, it abuts against the dust cover to keep the dust cover in the second position. When the control component is in the fourth position, it releases the restriction on the dust cover in the second position, so that the dust cover can freely switch between the first position and the second position.

[0007] In this technical solution, the control component and the dust cover are designed separately, and the control component is linked to the dust cover in one direction. When the control component switches from the fourth position to the third position, it drives the water sealing cover to open the water outlet channel and at the same time drives the dust cover to switch to the second position to open the spout. When the control component is in the third position, it holds the dust cover against the second position to ensure the water outlet function. When the control element is released and returns to the fourth position, the restriction on the dust cover in the second position is lifted. The dust cover can then freely move between the first and second positions relative to the control element. For example, if the user releases the control element before straightening the thermos, the thermos is still tilted and the dust cover is not being pushed off by the control element. Gravity allows the dust cover to remain in the second position with the spout open, preventing obstruction of the water flow. This allows the water to continue flowing in a stream into the receiving container, preventing splashing. Once the thermos is straightened, the dust cover returns to the first position and closes the spout through gravity or other auxiliary structures. Furthermore, this process effectively drains water from the inlet of the water channel and the spout, preventing residual water and minimizing its impact on the temperature of subsequently poured water.

[0008] The dust cover is hinged to the cover body, and the control member is hinged to the cover body; wherein, during the process of the control member rotating along the first rotation direction to switch from the fourth position to the third position, the control member abuts against the dust cover, so that the dust cover switches from the first position to the second position along the first rotation direction; when the control member is in the fourth position, there is a clearance space between the dust cover and the wall of the cover body in the first rotation direction of the dust cover.

[0009] In this technical solution, both the dust cover and the control component are hinged to the cover body. The dust cover rotates between a first position and a second position, while the control component rotates between a third position and a fourth position. When the control component rotates from the fourth position to the third position, it drives the dust cover to rotate from the first position to the second position. When the control component returns to the fourth position, there is a clearance between the dust cover and the wall of the cover body, and the wall of the cover body does not restrict the rotation of the dust cover, allowing the dust cover to freely rotate between the first and second positions. The control component is driven to rotate by pressing, which simultaneously drives the dust cover to rotate synchronously. The structure is simple and the operation is convenient.

[0010] A spring is provided between the dust cover and the cover body. The spring is used to drive the dust cover to switch from the second position to the first position after the control member releases the restriction on the dust cover.

[0011] In this technical solution, after the control component resets to the fourth position, on the one hand, the spring force drives the dust cover to reset to the first position where the spout is closed, ensuring that the dust cover can close the spout. The spring also provides a pressing effect between the dust cover and the spout, increasing the sealing performance and enabling the dust cover to play a stable dust and insect prevention role. On the other hand, by selecting a spring with a suitable elastic modulus, it can both drive the dust cover to reset and allow the dust cover to move relatively freely between the first and second positions. In other words, the selected spring force is insufficient to reset the dust cover when the thermos is tilted; it only provides a small amount of elastic force to help the dust cover return to its original position more quickly when the thermos is upright. This ensures that the dust cover can maintain the open spout when the thermos is tilted, and the water discharged at the moment of finishing pouring can overcome the force applied to the dust cover by the spring, thereby maintaining the dust cover in the second position where the spout is open and preventing the dust cover from blocking the water.

[0012] It should be noted that the spring force here should not be too large. The force generated by the spring force should not be greater than the force exerted on the spring by the dust cover due to gravity when the thermos is tilted. Otherwise, the dust cover will still quickly flip towards the first position covering the spout under the spring's rebound, thus blocking the water and losing the effect of the one-way linkage.

[0013] The dust cover is provided with positioning protrusions distributed on both sides of the control component, and each positioning protrusion corresponds to and cooperates with the spring.

[0014] In this technical solution, the positioning protrusions radially limit the spring, facilitating spring assembly and ensuring stable expansion and compression at a preset position. Furthermore, the positioning protrusions are distributed on both sides of the control component, ensuring the springs are also distributed on both sides, which helps to evenly distribute the force on the dust cover, thereby achieving reliable and smooth rotation.

[0015] The dust cover has a pressure-bearing part, a first hinge part, and a closing part. The first hinge part is hinged to the cover body, and the pressure-bearing part and the closing part are respectively connected to two opposite sides of the first hinge part. When the control member rotates along the first rotation direction, it applies pressure to the pressure-bearing part, thereby causing the closing part to rotate and open the spout. When the dust cover is in the first position, there is a clearance space between the pressure-bearing part and the wall of the cover body along the first rotation direction. The shape of the closing part is adapted to the spout to close the spout.

[0016] In this technical solution, the pressure-bearing part of the dust cover is used to withstand the pressure of the control component. The first hinge part is hinged to the cover body, allowing the dust cover to rotate. The closing part is used to open or close the spout. The pressure-bearing part and the closing part are respectively connected to two opposite sides of the first hinge part, making the dust cover form a rocker-type structure. This makes the pressing drive of the dust cover during the rotation of the control component in the first direction of rotation less strenuous. When the control component drives the pressure-bearing part downward, the closing part moves upward to open the spout; when the pressure-bearing part moves upward, the closing part moves downward to close the spout.

[0017] The weight of the cover portion is greater than the weight of the pressure-bearing portion.

[0018] In this technical solution, the lid can automatically open or close the spout under the action of torque. For example, when the thermos is in a straight position, the torque generated by the gravity of the lid causes the lid to automatically rotate downward and close the spout.

[0019] The control component is provided with a pressing curved surface, and the pressure-bearing part is provided with a pressure-bearing curved surface. The control component applies force to the pressure-bearing curved surface through the pressing curved surface.

[0020] In this technical solution, during the rotation of the control component from the fourth position to the third position, the control component applies pressure to the pressure-bearing curved surface of the pressure-bearing part by pressing the curved surface, thereby driving the dust cover to rotate. The pressing curved surface and the pressure-bearing curved surface form point contact or line contact, which makes the drive of the control component to the dust cover smoother and more fluid, helps to reduce jamming, and ensures that the control component stably drives the dust cover to rotate.

[0021] The dust cover has a clearance hole located between the pressure-bearing part and the cover part, and the cover body has a second hinge part passing through the clearance hole. The control component is hinged to the second hinge part.

[0022] In this technical solution, the control component is hinged to the second hinge part, which is located in the clearance hole provided in the dust cover. On the one hand, this makes the dust cover, control component and cover body fit together tightly. On the other hand, it makes it easy for the pressure-bearing part to be arranged around the second hinge part, so that the control component can contact and reliably apply force to the pressure-bearing part when it rotates in the first direction.

[0023] The cover is provided with an air inlet pipe for air to enter the water outlet channel. The air inlet pipe is fitted with an air inlet valve. The air inlet valve has a cross-shaped air inlet hole. The length and width of the air inlet hole are both smaller than the inner diameter of the air inlet pipe.

[0024] In this technical solution, by setting an air inlet valve, the length and width of the air inlet hole of the air inlet valve are both smaller than the inner diameter of the air inlet pipe, which greatly reduces the air passage area of ​​the air inlet hole. Under the premise of ensuring that air can enter the water outlet channel from the outside, the risk of water flowing out of the water outlet channel from the air inlet hole when the thermos is upside down is effectively reduced, thereby reducing the risk of users being scalded.

[0025] The air intake pipe extends vertically upward from the top of the cover, and the upper end of the air intake valve is bent so that the opening direction of the air intake hole deviates from the vertical direction; or, the air intake pipe extends from the top of the cover away from the vertical direction.

[0026] In this technical solution, by making the opening direction of the air inlet deviate from the vertical direction or by making the air inlet pipe extend from the top of the cover deviate from the vertical direction, the air inlet is prevented from directly hitting the control component, thus reducing the risk of scalding caused by water flowing directly from the air inlet to the control component.

[0027] Due to the adoption of the above technical solution, the technical effect achieved by this application is as follows: the control component and the dust cover are designed separately, and the control component is linked to the dust cover in one direction. When the control component switches from the fourth position to the third position, it drives the water sealing cover to open the water outlet channel and at the same time drives the dust cover to switch to the second position to open the spout. When the control component is in the third position, it holds the dust cover against the second position to ensure the water outlet function. When the control is released and returns to the fourth position, the restriction on the dust cover in the second position is lifted. The dust cover can then move freely between the first and second positions relative to the control. For example, when pouring water, even if the user releases the control before straightening the thermos, the dust cover can remain in the second position with the spout open due to gravity, as the thermos is still tilted. This avoids obstructing the water flow and prevents the water from being discharged from the spout due to gravity and inertia. The water can continue to be poured into the receiving container in a bundle, preventing splashing. When the user straightens the thermos, the dust cover returns to the first position and closes the spout by its own weight or other auxiliary structures. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is an assembly drawing of the thermos provided in an embodiment of this application;

[0030] Figure 2 Cross-sectional view of the thermos provided in the embodiments of this application Figure 1 ;

[0031] Figure 3 Cross-sectional view of the thermos provided in the embodiments of this application Figure 2 ;

[0032] Figure 4 Cross-sectional view of the thermos provided in the embodiments of this application Figure 3 ;

[0033] Figure 5 This is an assembly drawing of the lid assembly provided in an embodiment of this application;

[0034] Figure 6 This is an assembly drawing of the dust cover, spring, and cover body provided in the embodiments of this application;

[0035] Figure 7 A schematic diagram of the structure of the dust cover provided in the embodiments of this application. Figure 1 ;

[0036] Figure 8 A schematic diagram of the structure of the dust cover provided in the embodiments of this application. Figure 2 ;

[0037] Figure 9 This is a cross-sectional view of the dust cover and control components provided in an embodiment of this application;

[0038] Figure 10 This is a schematic diagram of the intake valve provided in an embodiment of this application.

[0039] List of components and reference numerals:

[0040] 1. Teapot body, 11. Teapot body, 12. Teapot spout, 121. Teapot spout, 122. Handle;

[0041] 2. Cover body; 21. Water outlet channel; 22. Second hinge part; 23. Air inlet pipe;

[0042] 3 control components, 31 pressing curved surface;

[0043] 4. Water seal cap;

[0044] 5 Dust cover, 51 Pressure bearing part, 511 Positioning protrusion, 512 Pressure bearing curved surface, 52 First hinge part, 53 Cover part, 54 Clearance hole;

[0045] 6 springs;

[0046] 7. Intake valve, 71. Intake port. Detailed Implementation

[0047] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0048] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0049] Furthermore, it should be understood in the description of this application that the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0052] In the embodiments of this application, a thermos is provided. For ease of explanation and understanding, the following descriptions are based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is merely a specific example and illustrative illustration, and does not constitute a specific limitation on the technical solution provided in this application.

[0053] Reference Figures 1 to 10 As shown, the thermos provided in this application includes a body 1 with a spout 121 and a lid assembly attached to the body 1. The lid assembly includes a lid body 2, a control component 3, and a sealing cap 4. The lid body 2 has a water outlet channel 21 for connecting the body 1 and the spout 121. The control component 3 is movably connected to the lid body 2 and is linked to the sealing cap 4. The methods by which the control component 3 drives the sealing cap 4 to open the water outlet channel 21 and the methods by which the sealing cap 4 resets to close the water outlet channel 21 are both prior art and will not be described in detail here. One end of the control component 3 can be connected inside the lid body 2, and the other end can extend outside the lid body 2 to form an operating end for the user to apply force. Furthermore, in a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the kettle body 1 includes a kettle body 11 and a kettle spout 12 connected to the opening of the kettle body 11. The spout 121 is provided on the kettle spout 12. The kettle spout 12 may also be provided with a handle 122 to facilitate holding the handle 122 to pour water.

[0054] The kettle lid also includes a dust cover 5 for opening or closing the spout 121. The dust cover 5 is movably connected to the lid body 2, and the dust cover 5 has a first position covering the spout 121 and a second position opening the spout 121. The dust cover 5 can switch between the first position and the second position. The control element 3 has a third position for opening the water outlet channel 21 with the water sealing cover 4 and a fourth position for closing the water outlet channel 21 with the water sealing cover 4. The control element 3 can switch between the third position and the fourth position. Specifically, as shown... Figure 3 The image shows the state when the control component 3 is in the third position and the dust cover 5 is in the second position. Figure 2 The diagram shows the state when the control element 3 is in the fourth position and the dust cover 5 is in the first position. This application does not limit the connection method between the dust cover 5 and the cover body 2. For example, the dust cover 5 can be hinged to the cover body 2 or slidably connected to the cover body 2.

[0055] When the control element 3 is in the third position, the control element 3 abuts against the dust cover 5 to keep the dust cover 5 in the second position; when the control element 3 is in the fourth position, the control element 3 releases the restriction on the dust cover 5 in the second position, so that the dust cover 5 can freely switch between the first position and the second position.

[0056] In this technical solution, the control component 3 and the dust cover 5 are designed as separate units, and the control component 3 is linked to the dust cover 5 in one direction. When the control component 3 switches from the fourth position to the third position, it drives the water sealing cover 4 to open the water outlet channel 21, and at the same time drives the dust cover 5 to switch to the second position to open the spout 121. When the control component 3 is in the third position, it holds the dust cover 5 against the second position to ensure the water outlet function. When the control component 3 is released and resets to the fourth position, the restriction on the dust cover 5 in the second position is released, and the dust cover 5 can move freely relative to the control component 3 between the first and second positions. For example, as shown in the image. Figure 4 As shown, when the water pouring is just finished, even if the user releases the control 3 before the user straightens the thermos, the control 3 is reset to the fourth position. Since the thermos is still tilted at this time, the dust cover 5 can be held in the second position with the spout 121 open under the action of gravity. This avoids obstructing the water discharged from the water outlet channel 21 and the spout 121 due to gravity and inertia, allowing the water to continue to be poured into the receiving container in a bundle, avoiding splashing in all directions. When the user straightens the thermos, the dust cover 5 is reset to the first position by its own gravity or other auxiliary structures (such as counterweights) and closes the spout 121.

[0057] In a preferred embodiment of this application, the dust cover 5 is hinged to the cover body 2, and the control member 3 is hinged to the cover body 2. Specifically, a hinge shaft can be provided on one of the dust cover 5 and the cover body 2, and a hinge hole can be provided on the other. The hinge shaft and the hinge hole cooperate to achieve the hinge connection between the dust cover 5 and the cover body 2. Furthermore, a hinge shaft can be provided on one of the control member 3 and the cover body 2, and a hinge hole can be provided on the other. The hinge shaft and the hinge hole cooperate to achieve the hinge connection between the control member 3 and the cover body 2. The control member 3 is hinged along a first rotation direction (e.g., ...). Figure 3 During the rotation (indicated by arrow X) from the fourth position to the third position, the control element 3 abuts against the dust cover 5, causing the dust cover 5 to switch from the first position to the second position along the first rotation direction. When the control element 3 is in the fourth position, there is a clearance space between the dust cover 5 and the wall of the cover body 2 in the first rotation direction of the dust cover 5. In this technical solution, both the dust cover 5 and the control element 3 are hinged to the cover body 2. The dust cover 5 rotates between the first and second positions, and the control element 3 rotates between the third and fourth positions. When the control element 3 rotates from the fourth position to the third position, it drives the dust cover 5 to rotate from the first position to the second position. When the control element 3 returns to the fourth position, there is a clearance space between the dust cover 5 and the wall of the cover body 2, and the wall of the cover body 2 does not restrict the rotation of the dust cover 5, allowing the dust cover 5 to freely rotate between the first and second positions. By pressing, the control element 3 is driven to rotate, and the control element 3 drives the dust cover 5 to rotate synchronously. The structure is simple and the operation is convenient.

[0058] As a preferred embodiment of this implementation, such as Figure 2 and Figure 6As shown, a spring 6 is provided between the dust cover 5 and the cover body 2. The spring 6 is used to drive the dust cover 5 to switch from the second position to the first position after the control member 3 releases the restriction on the dust cover 5. In this technical solution, after the control component 3 resets to the fourth position, on the one hand, the elastic force of the spring 6 drives the dust cover 5 to reset to the first position of closing the spout 121, ensuring that the dust cover 5 can close the spout 121. The spring 6 also makes the dust cover 5 press against the spout 121, increasing the sealing performance and enabling the dust cover 5 to play a stable dust and insect prevention role. On the other hand, by selecting a spring 6 with a suitable elastic modulus, it can both drive the dust cover 5 to reset and allow the dust cover 5 to move relatively freely between the first and second positions. In other words, the elastic force of the selected spring 6 is insufficient to reset the dust cover 5 when the kettle is tilted. It only provides a small elastic force to help the dust cover return to its original position more quickly when the thermos is upright. This ensures that the dust cover can keep the spout open when the thermos is tilted, and that the water discharged at the moment of finishing pouring can easily overcome the force applied to the dust cover 5 by the spring 6, thereby keeping the dust cover 5 in the second position of opening the spout 121 and preventing the dust cover 5 from blocking the water. It should be noted that the spring force of spring 6 here should not be too large. The force generated by the spring force should not be greater than the force exerted on spring 6 by dust cover 5 due to gravity when the thermos is tilted. Otherwise, dust cover 5 will still quickly flip towards the first position covering the spout 121 under the rebound action of spring 6, thus blocking water and losing the effect of one-way linkage. For example, in Figure 4 In the state shown, the elastic force of the spring 6 causes the dust cover 5 to rotate counterclockwise and close the spout 121, while the gravity of the dust cover 5 causes it to rotate clockwise and open the spout 121. By ensuring that the force generated by the elastic force is not greater than the force exerted by the dust cover 5 on the spring 6 due to gravity when the thermos is tilted, the dust cover 5 can still maintain the open spout 121 state under the action of gravity when the thermos is tilted.

[0059] Furthermore, such as Figure 6 , Figure 7 and Figure 8 As shown, the dust cover 5 is provided with positioning protrusions 511 distributed on both sides of the control component 3, each positioning protrusion 511 corresponding to the spring 6. In this technical solution, the positioning protrusions 511 form a radial limit on the spring 6, which facilitates the assembly of the spring 6 and its stable expansion and contraction at a preset position. In addition, the positioning protrusions 511 are distributed on both sides of the control component 3, so that the spring 6 is also distributed on both sides of the control component 3, which helps to make the dust cover 5 evenly stressed, thereby achieving reliable and smooth rotation. For example, when the control component 3 rotates from the first rotation direction to the third position, the pressure applied to the dust cover 5 is evenly distributed to the springs 6 on both sides through the dust cover 5, so that the dust cover 5 rotates stably to open the spout 121.

[0060] As a preferred embodiment of this implementation, such as Figures 5 to 9 As shown, the dust cover 5 has a pressure-bearing part 51, a first hinge part 52, and a closing part 53. The first hinge part 52 is hinged to the cover body 2. The pressure-bearing part 51 and the closing part 53 are respectively connected to two opposite sides of the first hinge part 52. When the control member 3 rotates along the first rotation direction, it applies pressure to the pressure-bearing part 51, causing the closing part 53 to rotate and open the spout 121. When the dust cover 5 is in the first position, there is a clearance space between the pressure-bearing part 51 and the wall of the cover body 2 along the first rotation direction. The shape of the closing part 53 is adapted to the spout 121 to close it. In this technical solution, the pressure-bearing part 51 of the dust cover 5 is used to bear the pressure of the control member 3, the first hinge part 52 is hinged to the cover body 2 to make the dust cover 5 rotatable, and the closing part 53 is used to open or close the spout 121. The pressure-bearing part 51 and the cover part 53 are respectively connected to the two opposite sides of the first hinge part 52, so that the dust cover 5 forms a rocker-type structure, making it easier to press and drive the dust cover 5 during the rotation of the control member 3 in the first direction. When the control member 3 drives the pressure-bearing part 51 downward, the cover part 53 moves upward and opens the spout 121; when the pressure-bearing part 51 moves upward, the cover part 53 moves downward and closes the spout 121. Preferably, the aforementioned positioning protrusion 511 can be set at the bottom of the pressure-bearing part 51, so that when the control member 3 presses the pressure-bearing part 51 downward, the pressure-bearing part 51 directly compresses the spring 6, and after the control member 3 returns to the fourth position, the spring 6 can also directly drive the pressure-bearing part 51 to rotate upward.

[0061] In a preferred embodiment, the weight of the lid 53 is greater than the weight of the pressure-bearing part 51, thereby enabling the lid 53 to automatically open or close the spout 121 under the action of torque. For example, when the thermos is in an upright position, the torque generated by the gravity of the lid 53 causes the lid 53 to automatically rotate downwards to close the spout 121. When the thermos is tilted, the torque generated by the gravity of the lid 53 can also cause the lid 53 to automatically rotate in the direction away from the spout 121 to open the spout 121.

[0062] In a preferred embodiment, such as Figure 9As shown, the control component 3 is provided with a pressing curved surface 31, and the pressure-bearing part 51 is provided with a pressure-bearing curved surface 512. The control component 3 applies force to the pressure-bearing curved surface 512 through the pressing curved surface 31. In this technical solution, during the rotation of the control component 3 from the fourth position to the third position, the pressing curved surface 31 applies pressure to the pressure-bearing curved surface 512 of the pressure-bearing part 51, thereby driving the dust cover 5 to rotate. The pressing curved surface 31 and the pressure-bearing curved surface 512 form point contact or line contact, making the drive of the dust cover 5 by the control component 3 smoother and more fluid, helping to reduce jamming and ensuring that the control component 3 stably drives the dust cover 5 to rotate.

[0063] In a preferred embodiment, such as Figure 5 and Figure 8 As shown, the dust cover 5 is provided with a clearance hole 54 located between the pressure-bearing part 51 and the closing part 53. The cover body 2 is provided with a second hinge part 22 passing through the clearance hole 54. The control member 3 is hinged to the second hinge part 22. In this technical solution, the control member 3 is hinged to the second hinge part 22. The second hinge part 22 is located in the clearance hole 54 provided in the dust cover 5. On the one hand, this makes the dust cover 5, the control member 3 and the cover body 2 fit together compactly. On the other hand, it facilitates the arrangement of the pressure-bearing part 51 around the second hinge part 22, thereby facilitating the contact of the control member 3 with the pressure-bearing part 51 when it rotates in the first rotation direction and reliably applies force to the pressure-bearing part 51.

[0064] As a preferred embodiment of this application, such as Figure 2 and Figure 10As shown, the cover 2 is provided with an air inlet pipe 23 for air to enter the water outlet channel 21. An air inlet valve 7 is fitted onto the air inlet pipe 23. The air inlet valve 7 has a cross-shaped air inlet hole 71, the length and width of which are smaller than the inner diameter of the air inlet pipe 23. Those skilled in the art will understand that, to avoid the water outlet channel 21 becoming difficult to open due to negative pressure, the air inlet pipe 23 is used to connect the outside environment with the water outlet channel 21, balancing the air pressure between the water outlet channel 21 and the outside environment, ensuring that the air seal 4 stably opens or closes the water outlet channel 21 under the action of the control component 3. There is a particular scenario when using a thermos: if the thermos is inverted and the control element 3 is accidentally pressed, the water seal 4 opens the water outlet 21, and the dust cover 5 also opens the spout 121. This means that hot water will not only flow out of the spout 121, but there is also a high probability that it will flow out through the air inlet 23 onto the control element 3. Because the control element 3 is close to the user's hand, hot water can easily leak along it onto the user's hand, causing burns. This particular scenario frequently occurs when young children use thermoses, as they lack awareness of thermos safety and are at higher risk of burns. Therefore, in this application, by setting an air inlet valve 7, which uses a cross-shaped air inlet hole 71 to allow air in, the length and width of the air inlet hole 71 are both smaller than the inner diameter of the air inlet pipe 23, thus greatly reducing the ventilation area of ​​the air inlet hole 71. Under the premise of ensuring that air can enter the water outlet channel 21 from the outside, the risk of water in the water outlet channel 21 being discharged from the air inlet hole 71 in the above-mentioned special usage scenario is effectively reduced, thereby reducing the risk of users being scalded.

[0065] In a preferred embodiment, such as Figure 2 and Figure 10 As shown, the air inlet pipe 23 extends vertically upward from the top of the cover 2, and the upper end of the air inlet valve 7 is bent so that the opening direction of the air inlet hole 71 deviates from the vertical direction. This prevents the air inlet hole 71 from directly hitting the control component 3, reducing the risk of scalding caused by water flowing directly from the air inlet hole 71 towards the control component 3. Alternatively, the air inlet pipe can extend from the top of the cover away from the vertical direction, and the air inlet valve can be installed on the air inlet pipe and also extend away from the vertical direction along with the air inlet pipe. This further prevents the air inlet hole from directly hitting the control component, reducing the risk of scalding caused by water flowing directly from the air inlet hole towards the control component.

[0066] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0067] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0068] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A vacuum flask, comprising a flask body with a spout, and a cover assembly coupled to the flask body, the cover assembly comprising a cover body, a control member, and a water seal cover, the cover body being provided with a water outlet channel for connecting the flask body and the spout, the control member being movably coupled to the cover body and being linked to the water seal cover; characterized in that, the cover further comprises a dust cover for opening or closing the spout, the dust cover being movably coupled to the cover body, and the dust cover having a first position for covering the spout and a second position for opening the spout, the dust cover being switchable between the first position and the second position; the control member has a third position for allowing the water seal cover to open the water outlet channel and a fourth position for allowing the water seal cover to close the water outlet channel, the control member being switchable between the third position and the fourth position; wherein, when the control member is in the third position, the control member abuts against the dust cover to keep the dust cover in the second position; and when the control member is in the fourth position, the control member releases the dust cover in the second position so that the dust cover is switchable between the first position and the second position freely.

2. The vacuum flask according to claim 1, characterized in that, the dust cover is hingedly coupled to the cover body, and the control member is hingedly coupled to the cover body; wherein, when the control member is rotated in a first rotation direction to switch from the fourth position to the third position, the control member abuts against the dust cover to switch the dust cover from the first position to the second position in the first rotation direction; and when the control member is in the fourth position, there is a clearance between the dust cover and a wall of the cover body in the first rotation direction of the dust cover.

3. The vacuum flask according to claim 2, characterized in that, a spring is provided between the dust cover and the cover body, the spring being configured to drive the dust cover to switch from the second position to the first position after the control member releases the dust cover.

4. The vacuum flask according to claim 3, characterized in that, the dust cover is provided with positioning protrusions distributed on two sides of the control member, each of the positioning protrusions being configured to cooperate with the spring.

5. The vacuum flask according to claim 2, characterized in that, the dust cover is provided with a pressure receiving portion, a first hinged portion, and a closing portion, the first hinged portion being hingedly coupled to the cover body, and the pressure receiving portion and the closing portion being respectively coupled to two opposite sides of the first hinged portion; wherein, when the control member is rotated in the first rotation direction, the closing portion is driven to rotate to open the spout by the pressure receiving portion being pressed, and when the dust cover is in the first position, there is the clearance between the pressure receiving portion and the wall of the cover body in the first rotation direction; and the closing portion is shaped to fit the spout to close the spout.

6. The vacuum flask according to claim 5, characterized in that, the closing portion has a weight greater than that of the pressure receiving portion.

7. The vacuum flask according to claim 5, characterized in that, ​ The control member is provided with a pressing curved surface, the pressure receiving part is provided with a pressure receiving curved surface, and the control member applies force to the pressure receiving curved surface through the pressing curved surface.

8. The vacuum cup of claim 5, wherein, The dustproof cover is provided with an avoiding hole between the pressure receiving part and the cover part, the cover body is provided with a second hinge part penetrating the avoiding hole, and the control member is hingedly connected with the second hinge part.

9. The vacuum cup of any one of claims 1-8, wherein, The cover body is provided with an air inlet pipe for the water outlet channel to inhale air, the air inlet pipe is sleeved with an air inlet valve, the air inlet valve is provided with a cross-shaped air inlet hole, and the length and width of the air inlet hole are both smaller than the inner diameter of the air inlet pipe.

10. The vacuum cup of claim 9, wherein, The air inlet pipe vertically extends upward from the top of the cover body, and the upper end of the air inlet valve is bent to make the opening direction of the air inlet hole deviate from the vertical direction. Alternatively, the air inlet pipe extends from the top of the cover body deviating from the vertical direction.

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