Residue-free squeeze squeeze cap

Abstract

The utility model discloses a kind of extrusion extrusion covers without residue, including cover, the outer top surface of the cover is equipped with the nozzle extending outward and being communicated to its inside;The cover inside is equipped with baffle, at least two independent fluid channels are defined between the baffle and the cover, respectively first channel and second channel, one end of the first channel and the second channel are all communicated to the accommodating space inside the cover, and the other end are all communicated to the nozzle inside;The flow cross-sectional area of the first channel is greater than the flow cross-sectional area of the second channel, and the length of the first channel is greater than the length of the second channel.The utility model has the advantage of no residue.

Description

Technical Field

[0001] This utility model relates to the field of bottle cap technology, and in particular to a residue-free squeeze cap. Background Technology

[0002] With the improvement of living standards, squeeze containers (commonly known as "squeeze bottles") are widely used in food (such as ketchup, salad dressing, honey, oyster sauce, etc.), cosmetics, and detergents due to their convenience and ease of dosage control. These containers are usually used with a cap with a nozzle, where the user squeezes the bottle to generate internal pressure, forcing the liquid out of the nozzle.

[0003] However, in practical use, especially for liquids with high viscosity (such as oyster sauce, honey, etc.), existing squeeze caps have obvious defects:

[0004] 1. Insufficient backflow capacity, leading to residue buildup: Existing bottle cap internal flow channel structures are typically simple or unremarkable. When the user stops squeezing the bottle, the bottle relies on its elasticity to generate negative pressure, attempting to "draw" residual liquid from the nozzle back into the bottle. However, for viscous liquids, due to their poor flowability and high surface tension, simple flow channels often cannot create a sufficiently strong or precise negative pressure at the nozzle tip, resulting in some liquid not being completely drawn back and remaining at the nozzle opening.

[0005] 2. Hygiene and Cleaning Issues: Liquid residue at the nozzle can easily drip, soiling the cap and bottle, and even contaminating the tabletop. Furthermore, residual liquid exposed to air for extended periods can dry, oxidize, or even mold, clogging the nozzle and severely impacting food hygiene or the user experience.

[0006] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a residue-free squeeze cap.

[0008] This utility model is achieved through the following technical solution:

[0009] To solve the above-mentioned technical problems, this utility model provides a residue-free squeeze cap, including a cap body, on the outer top surface of the cap body is a nozzle extending outward and communicating with its interior; a baffle is provided inside the cap body, the baffle and the cap body defining at least two independent fluid channels, namely a first channel and a second channel, one end of the first channel and the second channel are both connected to the receiving space inside the cap body, and the other end of both are connected to the nozzle; the flow cross-sectional area of ​​the first channel is larger than the flow cross-sectional area of ​​the second channel, and the length of the first channel is larger than the length of the second channel.

[0010] To further address the technical problem addressed by this invention, a residue-free squeeze cap is provided, wherein the inner top surface of the cap body is provided with at least one first retaining ring surrounding the nozzle, and the upper surface of the baffle is provided with at least one second retaining ring surrounding the nozzle. The first and second retaining rings are interlocked to form a meandering first channel between the baffle and the cap body. The baffle is also provided with several liquid inlet holes, which connect the internal accommodating space of the cap body with the first channel.

[0011] In order to further solve the technical problem to be solved by this utility model, this utility model provides a residue-free extrusion cap in which the center of the baffle is provided with a central tube extending upward to directly below the nozzle, and the top surface of the central tube is provided with a flow-limiting hole, and the second channel is composed of the inner cavity of the central tube and the flow-limiting hole.

[0012] In order to further solve the technical problem to be solved by this utility model, this utility model provides a residue-free extrusion cap in which the central tube has a tapered tube structure that gradually narrows from bottom to top.

[0013] In order to further solve the technical problem to be solved by this utility model, this utility model provides a residue-free squeeze cap in which the upper end of the central tube extends into the interior of the nozzle.

[0014] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a residue-free squeeze cap in which the first retaining ring is provided with a plurality of liquid inlet notches for liquid to pass through.

[0015] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a residue-free squeeze cap in which the number of first retaining rings is multiple, and the liquid inlet notches on adjacent first retaining rings are staggered in the circumferential direction.

[0016] In order to further solve the technical problem to be solved by this utility model, this utility model provides a residue-free squeeze cap in which the nozzle has a cone-shaped ejection channel that gradually narrows from bottom to top.

[0017] In order to further solve the technical problem to be solved by this utility model, this utility model provides a residue-free squeeze cap in which the baffle is detachably connected to the inner top surface of the cap body.

[0018] To further solve the technical problem to be solved by this utility model, this utility model provides a residue-free squeeze cap in which the periphery of the baffle is provided with an upwardly extending first mounting ring, the inner top surface of the cap is provided with a downwardly extending second mounting ring, the inner side wall of the first mounting ring is provided with an annular first latch, and the outer side wall of the second mounting ring is provided with an annular second latch, the first latch and the second latch engaging with each other.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention employs a "differentiated dual-channel" design based on fluid mechanics principles. Inside the cap, a long, large-section, meandering labyrinthine channel (first channel) and a short, small-section, central straight channel (second channel) are constructed. It utilizes the difference in flow resistance to intelligently distribute pressure: when the liquid is squeezed out, the large-section labyrinthine channel ensures smooth flow of viscous liquids; when the liquid is released and drawn back in, the significant frictional resistance of the labyrinthine channel forces negative pressure to preferentially pass through the least-resistance central straight channel, thus forming a strong and concentrated directional suction at the nozzle tip, instantly drawing residual liquid back into the bottle. This effectively solves the problems of dripping and residue buildup in viscous liquids such as oyster sauce and honey. Furthermore, the purely mechanical structure is inexpensive and eliminates the need for easily aging silicone valves, combining high performance with economy. Attached Figure Description

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the cover;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the baffle;

[0026] Figure 5 This is a diagram illustrating the process of squeezing liquid outwards.

[0027] Figure 6 This is a diagram illustrating the process of sucking back residual liquid. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 6 As shown, this utility model provides a residue-free squeeze cap, the main structure of which includes a cap body 1 and a baffle 2 disposed inside the cap body 1. The cap body 1 has an overall dome-shaped structure, having a top wall 1a, an outer side wall 1c extending downward from the edge of the top wall 1a, and an inner side wall 1b located inside the outer side wall 1c. The inner surface of the inner side wall 1b is provided with an internal thread or snap-fit ​​structure for connecting with the bottle mouth of a container (such as a soy sauce bottle, oyster sauce bottle, etc.) to achieve a sealed connection. The top wall 1a of the cap body 1 has a nozzle 11 that protrudes outward and extends from the center, and the interior of the nozzle 11 forms a channel communicating with the interior of the cap body 1. In order to optimize the liquid spray pattern, the interior of the nozzle 11 forms a tapered spray channel 111 that gradually narrows from bottom to top. In addition, although not shown in detail in the figure, in practical applications, the squeeze cap usually also includes a cap, which is hinged or integrally connected to one side of the cap body 1, for sealing the nozzle 11 when not in use to prevent dust from entering.

[0030] The core improvement in this embodiment lies in the design of the internal flow channel. For example... Figures 2-4 As shown, the baffle 2 is installed in the internal space of the cover 1. At least two independent fluid channels are defined between the baffle 2 and the inner wall of the cover 1 by a specific structure: a first channel 3 and a second channel 4. These two channels differ significantly in their hydrodynamic characteristics: the designed flow cross-sectional area of ​​the first channel 3 is larger than that of the second channel 4, but the path length of the first channel 3 is much greater than that of the second channel 4. One end of both the first channel 3 and the second channel 4 connects to the main receiving space (i.e., the side in contact with the liquid inside the bottle) at the bottom of the cover 1, and the other end converges and connects to the nozzle 11.

[0031] To achieve the structural characteristics of the first channel 3, which features a "large cross-section but long path," a maze-like flow channel design was adopted. Specifically, as follows: Figure 2 and Figure 3 As shown, at least one first retaining ring 12 extends downwards from the inner top surface of the cover 1, surrounding the nozzle 11; correspondingly, as Figure 4 As shown, the upper surface of the baffle 2 extends upward with at least one second retaining ring 21 surrounding the nozzle 11. The first retaining ring 12 and the second retaining ring 21 are spatially staggered (e.g., concentrically nested), thereby forming a meandering gap between the baffle 2 and the inner top surface of the cover 1, constituting the main body of the first channel 3.

[0032] In order to allow liquid to enter the channel, a plurality of liquid inlet holes 22 are provided on the bottom surface of the baffle 2, and the liquid inlet holes 22 are connected to the accommodating space below the cover 1 and the first channel 3.

[0033] Meanwhile, the first baffle ring 12 has several inlet notches 121 for liquid to pass through, and when multiple first baffle rings 12 are provided, the inlet notches 121 on adjacent first baffle rings 12 are staggered in the circumferential direction. This staggered design forces the liquid to travel a certain distance along the annular path when passing through the first channel 3 before entering the next loop, thereby greatly increasing the length of the flow resistance path.

[0034] In contrast, to achieve the structural characteristics of the second channel 4—"small cross-section but short path"—a center-through design was adopted. For example... Figure 2 and Figure 4 As shown, the baffle 2 has an upwardly extending central tube 23 at its center, which extends all the way to directly below the nozzle 11, and even its upper end extends directly into the interior of the nozzle 11. The top surface of the central tube 23 has a flow-limiting hole 231 with a small diameter. The second channel 4 is formed by the inner cavity of the central tube 23 and the flow-limiting hole 231 at the top. Preferably, the central tube 23 has a tapered tube structure that gradually tapers from bottom to top. This structure not only facilitates mold demolding, but more importantly, the tapered structure generates a certain resistance when the liquid is squeezed upward, preventing the liquid from passing through the second channel 4 too quickly; and when the liquid flows back, this structure helps to guide the liquid to retract smoothly.

[0035] Regarding the assembly method of baffle 2 and cover 1, as follows: Figure 2 , Figure 3 and Figure 4 As shown, this embodiment employs a detachable snap-fit ​​structure. The periphery of the baffle 2 is provided with an upwardly extending first mounting ring 24, and the inner sidewall of the first mounting ring 24 is provided with a protruding annular first latch 241. Correspondingly, the inner top surface of the cover 1 is provided with a downwardly extending second mounting ring 13, and the outer sidewall of the second mounting ring 13 is provided with a protruding annular second latch 131. During assembly, the baffle 2 is pushed into the cover 1, and the elastic deformation of the plastic parts causes the first latch 241 and the second latch 131 to cross over and engage with each other, thereby securely suspending the baffle 2 on the inner top surface of the cover 1.

[0036] The following is combined Figure 5 and Figure 6 Detailed explanation of the working principle of this utility model:

[0037] Extrusion process: such as Figure 5As shown, when the user inverts the bottle and squeezes it forcefully, the pressure inside the bottle increases. Since the bottle typically contains viscous liquids such as oyster sauce or honey, the flow resistance is relatively high. Although the first channel 3 has a longer path, its overall flow cross-sectional area is larger, allowing more fluid to pass through; while the second channel 4, although shorter, has a smaller flow-limiting orifice 231 at its tip, restricting the flow rate. Therefore, under the positive pressure of the squeeze, most of the liquid will flow along... Figure 5 As indicated by the middle arrow, the liquid enters through the inlet hole 22, passes through the labyrinth (first channel 3) formed by the first baffle ring 12 and the second baffle ring 21, and finally flows into the nozzle 11 for extrusion; a small portion of the liquid will be extruded through the central tube 23 (second channel 4).

[0038] Backflow process: such as Figure 6 As shown, the moment the user stops squeezing and releases their grip, the bottle recovers its elasticity, creating a negative pressure inside. This necessitates drawing in air from the outside or drawing liquid back from the nozzle to balance the pressure. At this point, because the first channel 3 is winding and long, the backflow resistance of the viscous liquid is extremely high (large head loss along the flow path), making it difficult for the liquid to flow back quickly. In contrast, the second channel 4 (central tube 23) is extremely short and directly connects the nozzle 11 to the bottle's interior, resulting in relatively minimal fluid resistance. Therefore, the negative pressure inside the bottle preferentially travels through the second channel 4, where resistance is least, to the tip of the nozzle 11, creating a strong local suction force (such as...). Figure 6 (As indicated by the arrow). This suction force can quickly draw the residual liquid inside the nozzle 11 and at the nozzle opening back into the bottle through the central tube 23, thereby effectively solving the problem of viscous liquid sticking to the wall and dripping, and achieving a "no residue" effect.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A residue-free squeeze cap, characterized in that: The device includes a cover (1), on the outer top surface of which a nozzle (11) extends outward and connects to its interior; inside the cover (1) is a baffle (2), which defines at least two independent fluid channels between the baffle (2) and the cover (1), namely a first channel (3) and a second channel (4), one end of the first channel (3) and the second channel (4) are connected to the receiving space inside the cover (1), and the other end of the first channel (3) is connected to the nozzle (11); the flow cross-sectional area of ​​the first channel (3) is larger than the flow cross-sectional area of ​​the second channel (4), and the length of the first channel (3) is larger than the length of the second channel (4).

2. The residue-free squeeze cap according to claim 1, characterized in that: The inner top surface of the cover (1) is provided with at least one first retaining ring (12) surrounding the nozzle (11), and the upper surface of the baffle (2) is provided with at least one second retaining ring (21) surrounding the nozzle (11). The first retaining ring (12) and the second retaining ring (21) are interlocked to form a meandering first channel (3) between the baffle (2) and the cover (1). The baffle (2) is also provided with a plurality of liquid inlet holes (22), which connect the accommodating space inside the cover (1) with the first channel (3).

3. The residue-free squeeze cap according to claim 1, characterized in that: The baffle (2) has a central tube (23) extending upward to the nozzle (11) directly below it, and the top surface of the central tube (23) has a flow-limiting hole (231). The second channel (4) is composed of the inner cavity of the central tube (23) and the flow-limiting hole (231).

4. The residue-free squeeze cap according to claim 3, characterized in that: The central tube (23) has a tapered tube structure that gradually narrows from bottom to top.

5. A residue-free squeeze cap according to claim 3, characterized in that: The upper end of the central tube (23) extends into the interior of the nozzle (11).

6. The residue-free squeeze cap according to claim 2, characterized in that: The first retaining ring (12) has several liquid inlet notches (121) for liquid to pass through.

7. A residue-free squeeze cap according to claim 6, characterized in that: There are multiple first retaining rings (12), and the liquid inlet notches (121) on adjacent first retaining rings (12) are staggered in the circumferential direction.

8. A residue-free squeeze cap according to claim 1, characterized in that: The nozzle (11) has a tapered ejection channel (111) that gradually narrows from bottom to top.

9. A residue-free squeeze cap according to claim 1, characterized in that: The baffle (2) is detachably connected to the inner top surface of the cover (1).

10. A residue-free squeeze cap according to claim 9, characterized in that: The baffle (2) is provided with an upwardly extending first mounting ring (24) around its periphery, and the cover (1) is provided with a downwardly extending second mounting ring (13) on its inner top surface. The inner sidewall of the first mounting ring (24) is provided with an annular first latch (241), and the outer sidewall of the second mounting ring (13) is provided with an annular second latch (131). The first latch (241) and the second latch (131) engage with each other.

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