Single-valve dispensing pump for cosmetic bottles

Abstract

This utility model belongs to the field of cosmetic packaging technology, specifically relating to a single-valve quantitative dispensing pump for cosmetic bottles, comprising: an outer pump cover with a pressing part; an inner pump cover forming a sealed cavity with the outer pump cover, the inner pump cover having a suction channel and a discharge channel, the discharge channel connecting to the sealed cavity; a suction valve, the suction channel connecting to or separating the sealed cavity through the suction valve; and a one-way nozzle, including a nozzle with a transversely penetrating discharge hole in the center of the nozzle, the inlet of the discharge hole connecting to the other end of the discharge channel, the outlet of the discharge hole extending out of the outer pump cover; when the pressing part is pressed down, the suction valve closes, causing the suction channel to be separated from the sealed cavity, and the material in the sealed cavity is ejected from the discharge hole of the one-way nozzle through the discharge channel; when the pressing part returns to its original position, the suction valve opens, causing the material to enter the sealed cavity through the suction channel. This utility model uses an elastic pressing part to achieve the purpose of dispensing, resulting in a lighter pressing feel and a simpler structure.

Description

Technical Field

[0001] This utility model belongs to the field of cosmetic packaging technology, specifically relating to a single-valve quantitative dispensing pump for cosmetic bottles. Background Technology

[0002] In existing technology, when cosmetic products are placed inside a bottle, a cosmetic dispensing pump is usually detachably connected to the bottle opening for use. The pump dispenses the product from the bottle by pressing. The product is typically an emulsion.

[0003] A cosmetic bottle dispensing pump mainly consists of a pump body, a compression head, a metal spring, and seals. In use, pressing the compression head compresses the metal spring, pushing the liquid inside the pump body through the seals and being sprayed out. The traditional cosmetic bottle dispensing pump described above suffers from numerous structural components, complex structure, cumbersome assembly, and low economic efficiency. Furthermore, the metal spring often provides a stiff feel when pressed, resulting in a poor user experience. Utility Model Content

[0004] This invention addresses the technical problems of existing cosmetic bottle dispensing pumps, such as complex structure, cumbersome assembly, and poor user experience, by providing a single-valve quantitative dispensing pump for cosmetic bottles.

[0005] To solve the aforementioned technical problems, this utility model provides a single-valve metering pump for cosmetic bottles, the single-valve metering pump for cosmetic bottles comprising:

[0006] Pump outer cover, the pump outer cover having a resilient pressing part;

[0007] The pump inner cover is disposed inside the pump outer cover and its top forms a sealed cavity with the pump outer cover. The pump inner cover has a suction channel and a discharge channel, and one end of the discharge channel is connected to the sealed cavity.

[0008] A suction valve is located below the pressing part and is disposed at the outlet of the suction channel. The suction channel is connected to or separated from the sealing cavity through the suction valve.

[0009] A one-way nozzle assembly includes a nozzle, a transversely penetrating discharge hole is provided in the center of the nozzle, the inlet of the discharge hole is connected to the other end of the discharge channel, and the outlet of the discharge hole extends out of the pump cover.

[0010] When the pressing part is pressed down, the suction valve closes, causing the suction channel to be separated from the sealing cavity. The material in the sealing cavity is ejected from the discharge port of the discharge hole through the discharge channel. When the pressing part is reset from the pressed state, the material stops being ejected from the discharge port of the discharge hole through the discharge channel, and the suction valve opens, causing the material to enter the sealing cavity through the suction channel.

[0011] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the middle part of the pressing part has an upwardly convex arc-shaped structure.

[0012] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the pump cover includes an outer cover body, the outer cover body is a cylindrical structure with openings at the top and bottom, a discharge seat hole is provided on the circumferential side of the outer cover body, the discharge port of the discharge hole extends out of the discharge seat hole, and the pressing part is provided on the top of the outer cover body.

[0013] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the outer cap body and the pressing part are made of thermoplastic elastomer.

[0014] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the outer cap body and the pressing part are integrally formed.

[0015] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the pump inner cap is integrally formed with the suction channel and the discharge channel.

[0016] Optionally, in the single-valve metering pump for cosmetic bottles as described above, the pump outer cover, the pump inner cover, the suction valve, and the one-way nozzle are all made of all-plastic.

[0017] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, one of the inner wall of the pump outer cover and the outer wall of the pump inner cover is provided with a positioning groove and the other is provided with a positioning rib. The positioning of the pump outer cover and the pump inner cover is achieved by inserting the positioning rib into the positioning groove.

[0018] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, one of the inner wall of the pump outer cover and the outer wall of the pump inner cover is provided with a snap-fit ​​groove along the upper circumferential direction, and the other is provided with a snap-fit ​​along the upper circumferential direction. The connection between the pump outer cover and the pump inner cover is achieved by the snap-fit ​​groove engaging with the snap-fit ​​groove.

[0019] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, one of the inner wall of the pump outer cover and the outer wall of the pump inner cover is provided with a first airtight surface along its upper circumferential direction, and the other is provided with a first airtight rib along its upper circumferential direction. The first airtight rib is used to seal and connect the first airtight surface to form the sealing cavity.

[0020] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the outlet of the suction channel is connected to the top surface of the pump inner cover, the top surface of the pump inner cover has a second airtight surface, the second airtight surface is arranged around the outlet of the suction channel, the bottom surface of the suction valve has a suction valve airtight surface, when the pressing part is pressed down, the suction valve airtight surface is sealed to the second airtight surface, causing the suction channel to be separated from the sealing cavity.

[0021] Optionally, in the single-valve metering pump for cosmetic bottles as described above, the discharge channel adopts an L-shaped or Z-shaped structure, the top or top side inlet of the discharge channel is connected to the sealing cavity, and the side or bottom side outlet of the discharge channel is connected to the inlet of the discharge hole.

[0022] Optionally, in the single-valve metering pump for cosmetic bottles as described above, the lower part of the pump inner cover is a hollow structure, and the suction channel passes through the hollow structure;

[0023] The hollow structure at the bottom of the pump inner cover has a connection part that can be detachably connected to the bottle opening of the cosmetic bottle.

[0024] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the connecting part is an internal thread, a connecting buckle, or a connecting groove.

[0025] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the hollow structure has a gasket at the top.

[0026] Optionally, in the single-valve metering pump for cosmetic bottles as described above, the one-way nozzle and the pump cover are separate structures, one end of the nozzle is sealed to the outlet of the discharge channel, and the other end of the nozzle extends out of the pump cover.

[0027] The one-way nozzle also includes an elastic discharge nozzle, which is disposed inside the nozzle. One end of the elastic discharge nozzle is open and connected to the discharge channel, and the other end of the elastic discharge nozzle is provided with a discharge slit. The discharge hole is located between the opening at one end of the elastic discharge nozzle and the discharge slit at the other end of the elastic discharge nozzle.

[0028] When the pressing part is pressed down, the discharge slit opens, causing the material in the sealed cavity to be ejected from the discharge slit of the elastic discharge nozzle through the discharge channel. When the pressing part returns to its original state, the discharge slit closes.

[0029] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the nozzle is made of hard rubber and the flexible discharge nozzle is made of soft rubber.

[0030] Optionally, in the single-valve metering pump for cosmetic bottles as described above, one of the inner wall of the discharge port of the discharge channel and the outer wall of the nozzle is provided with a third airtight groove along its upper circumferential direction, and the other is provided with a third airtight rib along its upper circumferential direction. The nozzle and the discharge port of the discharge channel are sealed and connected by the third airtight rib to the third airtight groove.

[0031] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the one-way nozzle and the pump cover are integrally formed, the nozzle and the pump cover are integrally manufactured, and the nozzle protrudes from the side wall of the pump cover.

[0032] Optionally, in the single-valve metering pump for cosmetic bottles as described above, the discharge port is composed of several sequentially connected discharge port segments, the diameter of the several discharge port segments gradually decreasing from the inside to the outside, so that the discharge port forms a progressive discharge port.

[0033] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the diameter of at least the outermost discharge port section is a fixed diameter, and the diameters of the other discharge port sections, excluding the outermost discharge port section, are either fixed or gradually decrease from the inside to the outside.

[0034] Optionally, the lateral length D of the outermost discharge hole section is 0.5mm to 7mm, preferably 0.5mm to 2.5mm, the longitudinal length E of the outermost discharge hole section is 0.8mm to 3mm, the height F of the outermost discharge hole section is 0mm to 0.2mm, preferably 0mm to 0.1mm, and the Shore hardness value of the nozzle is 30A to 90A.

[0035] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, the nozzle is located on the lower side of the sealed cavity;

[0036] One of the inner wall of the pump outer cover and the outer wall of the pump inner cover on the inner side below the nozzle has a fourth airtight surface arranged circumferentially along its upper edge, and the other has a fourth airtight rib arranged circumferentially along its upper edge. The fourth airtight rib seals and connects the fourth airtight surface to achieve a sealed connection between the pump outer cover and the pump inner cover on the inner side below the nozzle.

[0037] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, one of the inner wall of the pump outer cover and the outer wall of the pump inner cover has at least two snap-fit ​​slots along its upper circumferential direction, and the other has at least one snap-fit ​​along its upper circumferential direction. When the uppermost snap-fit ​​engages with the uppermost snap-fit ​​slot to connect the pump outer cover and the pump inner cover, the sealing cavity has a first storage space. When the uppermost snap-fit ​​engages with the other snap-fit ​​slots (excluding the uppermost snap-fit ​​slot) to connect the pump outer cover and the pump inner cover, the sealing cavity has a second storage space, which is larger than the first storage space.

[0038] Optionally, in the single-valve dispensing pump for cosmetic bottles as described above, there are three locking slots, which are, from bottom to top, a first locking slot, a second locking slot, and a third locking slot.

[0039] The buckle consists of two buckles, which are the first buckle and the second buckle from bottom to top;

[0040] When the second buckle engages with the third buckle groove, the first buckle engages with the first buckle groove, and the sealing cavity has a first material storage space;

[0041] When the second buckle engages with the second buckle slot, the first buckle is suspended between the outer cover of the pump and the inner cover of the pump, and the sealing cavity has a second material storage space.

[0042] The positive and progressive effects of this utility model are as follows:

[0043] 1. This utility model abandons the traditional cosmetic bottle dispensing pump structure, does not contain complex structures such as compression heads and metal springs, and at most includes only an outer pump cover, an inner pump cover, a suction valve, and a one-way nozzle. It uses an elastic pressing part to press and achieve the purpose of dispensing, making the pressing feel lighter and the structure simpler.

[0044] 2. This utility model adopts an all-plastic structure, which is more environmentally friendly and more economical.

[0045] 3. The nozzle and pump outer cover of this utility model are made as one piece, so that this utility model only includes three components: pump outer cover with nozzle, pump inner cover and suction valve, making assembly simpler.

[0046] 4. Through the adjustable connection between the inner and outer covers of the pump, the size of the sealed cavity storage space can be varied, thereby adjusting the discharge rate and providing customers with multiple options. Attached Figure Description

[0047] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0048] Figure 1 This is a front view of a structure according to Embodiment 1 of this utility model;

[0049] Figure 2 for Figure 1 Top view;

[0050] Figure 3 for Figure 2 AA section view;

[0051] Figure 4 for Figure 1 Exploded view;

[0052] Figure 5 This is a schematic diagram of one state when the pressing part is pressed down in Embodiment 1 of this utility model;

[0053] Figure 6 This is a schematic diagram of one state when the pressing part is reset in Embodiment 1 of this utility model;

[0054] Figure 7 This is a schematic diagram of a pump outer cover in Embodiment 1 of this utility model;

[0055] Figure 8 for Figure 7 Another perspective illustration;

[0056] Figure 9 for Figure 7 A sectional view;

[0057] Figure 10 This is a schematic diagram of a pump inner cover in Embodiment 1 of this utility model;

[0058] Figure 11 for Figure 10 Another perspective illustration;

[0059] Figure 12 for Figure 10 A sectional view;

[0060] Figure 13 This is a schematic diagram of the suction valve in Embodiment 1 of this utility model;

[0061] Figure 14 This is a schematic diagram of the nozzle structure in Embodiment 1 of this utility model;

[0062] Figure 15 for Figure 14 A sectional view;

[0063] Figure 16 This is an assembly process diagram of Embodiment 1 of the present utility model;

[0064] Figure 17 This is a structural cross-sectional view of Embodiment 2 of the present invention;

[0065] Figure 18 This is a schematic diagram of one state when the pressing part is pressed down in Embodiment 2 of this utility model;

[0066] Figure 19 This is a schematic diagram of one state when the pressing part is reset in Embodiment 2 of this utility model;

[0067] Figure 20 This is a structural cross-sectional view of the unidirectional nozzle component in Embodiment 2 of this utility model;

[0068] Figure 21 This is an assembly process diagram of Embodiment 2 of the present invention;

[0069] Figure 22 This is a structural cross-sectional view of Embodiment 3 of the present invention;

[0070] Figure 23 This is a schematic diagram of one state when the pressing part is pressed down in Embodiment 3 of this utility model;

[0071] Figure 24 This is a schematic diagram of one state when the pressing part is reset in Embodiment 3 of this utility model;

[0072] Figure 25 This is a cross-sectional view of the pump outer cover in Embodiment 3 of this utility model;

[0073] Figure 26 for Figure 25 BB cross-sectional view;

[0074] Figure 27 This is a cross-sectional view of the pump inner cover in Embodiment 3 of this utility model;

[0075] Figure 28 for Figure 27 CC section view;

[0076] Figure 29 This is a schematic diagram of a discharge rate state in Embodiment 3 of this utility model;

[0077] Figure 30 This is a schematic diagram of another discharge rate state in Embodiment 3 of this utility model;

[0078] Figure 31 This is an assembly process diagram of Embodiment 3 of the present invention;

[0079] Figure 32This is another assembly process diagram of Embodiment 3 of this utility model;

[0080] Figure 33 for Figure 22 A magnified view of a portion of the image;

[0081] Figure 34 This is a side view of Embodiment 3 of the present invention;

[0082] Figure 35 for Figure 34 A magnified view of a portion of the image. Detailed Implementation

[0083] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0084] It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0085] In the description of this utility model, it should be noted that the directional terms such as "outer side", "middle section", "inner", "outer" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0087] Example 1:

[0088] Reference Figures 1 to 16 This embodiment provides a metering pump for cosmetic bottles, which is detachably connected to the bottle body and squeezes out a liquid, which is generally an emulsion, from the bottle body by pressing the metering pump.

[0089] The quantitative dispensing pump for cosmetic bottles in this embodiment includes an outer pump cover 10, an inner pump cover 20, a suction valve 30, and a one-way nozzle 40.

[0090] Reference Figures 1 to 9 The pump outer cover 10 includes an outer cover body 11 and a pressing part 12.

[0091] The outer cover body 11 is a cylindrical structure with openings at the top and bottom. A discharge seat hole 111 is provided on the circumferential side of the outer cover body 11. The discharge port of the one-way nozzle 40 extends out of the discharge seat hole 111. A pressing part 12 is provided on the top of the outer cover body 11.

[0092] The pressing part 12 is an elastic pressing part 12, that is, under the action of external force, the pressing part 12 can be pressed down on the top of the outer cover body 11, and the pressing part 12 can be reset after the external force is removed.

[0093] In some embodiments, the middle part of the pressing part 12 is an upwardly convex arc-shaped structure.

[0094] In some embodiments, both the outer cover body 11 and the pressing part 12 are made of thermoplastic elastomer.

[0095] In other words, the pump outer cover 10, which consists of the outer cover body 11 and the pressing part 12, is made of thermoplastic elastomer.

[0096] In some embodiments, the outer cover body 11 and the pressing portion 12 are integrally formed. In one example, the outer cover body 11 and the pressing portion 12 are integrally formed using a thermoplastic elastomer. During manufacturing, the middle portion of the pressing portion 12 may be made thinner or thicker than the outer cover body 11, depending on the material properties, to achieve elasticity.

[0097] Reference Figure 3 , Figures 10 to 12 The pump inner cover 20 is disposed inside the pump outer cover 10 and its top forms a sealed cavity 50 with the pump outer cover 10. The pump inner cover 20 has a suction channel 21 and a discharge channel 22.

[0098] The inlet of the suction channel 21 is located at the bottom of the pump inner cover 20. The inlet of the suction channel 21 is used to communicate with the bottle body to draw the material in the bottle body into the suction channel 21 under negative pressure. In one example, an additional suction pipe can be connected to the inlet of the suction channel 21. The suction pipe extends into the bottle body to smoothly draw the material at the bottom of the bottle body into the suction channel 21 under negative pressure.

[0099] The outlet of the suction channel 21 is connected to the sealing cavity 50. A suction valve 30 is provided at the outlet of the suction channel 21 so that the suction channel 21 can be connected to or separated from the sealing cavity 50 through the suction valve 30.

[0100] The inlet of the discharge channel 22 is connected to the sealing cavity 50, and the outlet of the discharge channel 22 is connected to the inlet of the one-way nozzle component 40.

[0101] When the pressing part 12 is pressed down, refer to Figure 5 When the suction valve 30 is closed, the suction channel 21 is separated from the sealing cavity 50. The material in the sealing cavity 50 is ejected from the discharge port of the one-way nozzle 40 through the discharge channel 22. During the process of the pressing part 12 resetting from the pressed state, refer to Figure 6 When the suction valve 30 is opened, the material enters the sealed cavity 50 through the suction channel 21.

[0102] In some embodiments, the top surface of the pump inner cover 20 is provided with a top surface groove. When the pump inner cover 20 is disposed inside the pump outer cover 10, the top surface groove and the pressing part 12 of the pump outer cover 10 together form a sealing cavity 50. At this time, the discharge port of the suction channel 21 and the inlet of the discharge channel 22 are respectively connected to the top surface groove.

[0103] Of course, the top surface of the pump inner cover 20 can also be a flat surface without a top surface groove. When the pump inner cover 20 is installed inside the pump outer cover 10, the top surface of the pump inner cover 20 and the pressing part 12 together form a sealing cavity 50. At this time, the discharge port of the suction channel 21 and the inlet of the discharge channel 22 are exposed on the top surface of the pump inner cover 20, so as to communicate with the sealing cavity 50.

[0104] In some embodiments, the pump inner cover 20 is integrally formed with the suction channel 21 and the discharge channel 22. In one example, the pump inner cover 20 is integrally formed with the suction channel 21 and the discharge channel 22 by plastic injection molding.

[0105] In some embodiments, refer to Figure 8 A positioning groove 13 is provided on the inner wall of the pump outer cover 10. In one example, the positioning groove 13 is provided on the outer cover body 11, and the length direction of the positioning groove 13 is vertical. (Refer to...) Figure 10 A positioning rib 23 is provided on the outer wall of the pump inner cover 20. In one example, the length direction of the positioning rib 23 is vertical. The positioning rib 23 is inserted into the positioning groove 13 to achieve positioning between the pump outer cover 10 and the pump inner cover 20. The positioning rib 23 inserted into the positioning groove 13 also prevents rotation around the vertical direction after the pump inner cover 20 is located inside the pump outer cover 10.

[0106] In another example, a positioning rib is provided on the inner wall of the pump outer cover 10, and a positioning groove is provided on the outer wall of the pump inner cover 20. The positioning of the pump outer cover 10 and the pump inner cover 20 is achieved by inserting the positioning rib into the positioning groove.

[0107] In some embodiments, refer to Figure 9 The pump outer cover 10 has a snap-fit ​​groove 14 arranged circumferentially on its inner wall. In one example, the lower inner wall of the outer cover body 11 has a ring of snap-fit ​​grooves 14 arranged circumferentially. (See reference...) Figures 10 to 12 The pump inner cover 20 has a snap fastener 24 arranged circumferentially on its outer wall. In one example, the pump inner cover 20 has a ring of snap fasteners 24 arranged circumferentially on its outer wall. (See reference...) Figure 3 The outer cover 10 of the pump and the inner cover 20 are connected by snap-fit ​​24 to snap-fit ​​groove 14.

[0108] In another example, a snap fastener is provided on the inner wall of the pump outer cover 10 along the circumferential direction, and a snap fastener groove is provided on the outer wall of the pump inner cover 20 along the circumferential direction. The snap fasteners engage with the snap fastener grooves to achieve a snap-fit ​​connection between the pump outer cover 10 and the pump inner cover 20.

[0109] In some embodiments, a first airtight surface 15 is provided circumferentially on the inner wall of the pump outer cover 10. In one example, a first airtight surface 15 is provided circumferentially on the inner wall of the pressing part 12. (Refer to...) Figure 10 and Figure 11 A first airtight rib 25 is provided around the circumference of the outer wall of the pump inner cover 20. (Refer to...) Figure 10 The first airtight rib 25 is used to seal the first airtight surface 15 to form a sealed cavity 50.

[0110] In another example, a first airtight rib is provided circumferentially on the inner wall of the pump outer cover 10, and a first airtight surface is provided circumferentially on the outer wall of the pump inner cover 20. The first airtight rib is used to seal and connect the first airtight surface to form a sealed cavity 50.

[0111] In some embodiments, refer to Figure 11 The discharge port of the suction channel 21 connects to the top surface of the pump inner cover 20. The top surface of the pump inner cover 20 has a second airtight surface 26, which surrounds the discharge port of the suction channel 21; that is, the second airtight surface 26 is an annular airtight surface. (Refer to...) Figure 13 The bottom surface of the suction valve 30 has a suction valve airtight surface 31. When the pressing part 12 is pressed down, the suction valve airtight surface 31 is sealed to the second airtight surface 26, causing the suction channel 21 to be separated from the sealing cavity 50.

[0112] In some embodiments, refer to Figure 3 and Figure 12 The discharge channel 22 adopts an L-shaped or Z-shaped structure. The top or top side inlet of the discharge channel 22 is connected to the sealing cavity 50, and the side or bottom side outlet of the discharge channel 22 is connected to the inlet of the one-way nozzle 40.

[0113] In some embodiments, refer to Figure 12 The lower part of the pump inner cover 20 is a hollow structure, through which the suction channel 21 passes. The hollow structure at the lower part of the pump inner cover 20 has a connecting part 27 that can be detachably connected to the bottle opening of the cosmetic bottle.

[0114] In some embodiments, the connecting portion 27 is an internal thread, a connecting snap, or a connecting groove.

[0115] In some embodiments, the hollow structure has a gasket at the top for further sealing.

[0116] Reference Figure 3 The suction valve 30 is located below the pressing part 12 and at the outlet of the suction channel 21. The suction channel 21 is connected to or separated from the sealing cavity 50 through the suction valve 30. When the pressing part 12 is pressed down, the suction valve 30 is tightly pressed against the outlet of the suction channel 21, thus separating the suction channel 21 from the sealing cavity 50. When the pressing part 12 returns to its original position from the pressed state, the sealing cavity 50 forms a negative pressure state. At this time, the suction valve 30 changes from the pressing state to the negative pressure rising state. During the rising process, the outlet of the suction channel 21 opens, allowing the material in the suction channel 21 to enter the sealing cavity 50, providing material for the one-way nozzle 40 to discharge during the next pressing of the pressing part 12. In other words, the suction valve 30 is a valve body structure that opens under negative pressure.

[0117] In some embodiments, refer to Figure 3 and Figure 13 The suction valve 30 has a large end and a small end, which are smoothly connected with a groove between them. The groove is used to lock onto the outlet of the suction channel 21. There is a gap between the outer wall of the groove and the outlet of the suction channel 21 so that the material can pass through the gap into the sealing cavity 50. The large end is located above the outlet of the suction channel 21, while the small end is located inside the suction channel 21. The suction valve 30 is elastic. When the pressing part 12 is pressed down, the bottom surface of the large end of the suction valve is pressed against the top surface of the pump inner cover 20, thus separating the suction channel 21 from the sealing cavity 50. When the pressing part 12 is reset from the pressed state, the elastic suction valve 30, under the action of negative pressure, causes the edge of the large end to warp upward. The bottom surface of the large end and the top surface of the pump inner cover 20 cannot form an airtight structure, and the suction channel 21 communicates with the sealing cavity 50. The material in the suction channel 21 enters the sealing cavity 50 through the gap under the action of negative pressure.

[0118] Reference Figures 1 to 4 , Figure 14 and Figure 15 The inlet of the one-way nozzle 40 is connected to the outlet channel 22, and the outlet of the one-way nozzle 40 extends out of the pump cover 10. In this embodiment, the one-way nozzle 40 and the pump cover 10 are separate structures, and the one-way nozzle 40 includes a nozzle 41 and an outlet valve 42.

[0119] One end of the nozzle 41 is sealed to the discharge port of the discharge channel 22, and the other end of the nozzle 41 extends out of the discharge seat hole 111 of the pump outer cover 10. Of course, the nozzle 41 has a through nozzle channel inside so that the material can be ejected from the nozzle 41.

[0120] The discharge valve 42 is located within the discharge channel 22. When the pressing part 12 is pressed down, the discharge valve 42 opens, causing the material in the sealing cavity 50 to be ejected from the discharge port of the nozzle 41 through the discharge channel 22. When the pressing part 12 returns to its original position, the discharge valve 42 closes, causing the nozzle 41 and the discharge channel 22 to disconnect from the sealing cavity 50, thus stopping the material from being ejected from the discharge port of the nozzle 41 through the discharge channel 22. In other words, the discharge valve 42 is a valve body structure that closes under negative pressure.

[0121] In some embodiments, refer to Figure 3 The discharge valve 42 adopts the same as Figure 13 The suction valve 30 in the two have the same structure, but their different positions result in different functions. In one example, the discharge channel 22 has a mounting hole, and the discharge valve 42 is mounted on the mounting hole with its large end on the outside and its small end on the inside. There is a gap between the groove of the discharge valve 42 and the mounting hole. When the pressing part 12 is pressed down, refer to... Figure 5 Because the suction channel 21 is separated from the sealing cavity 50, the air in the sealing cavity 50 can only flow to the discharge channel 22, causing the discharge valve 42 to elastically deform. The discharge channel 22 is connected to the nozzle 41, and the material is sprayed out of the pump cover 10 through the nozzle 41. During the process of the pressing part 12 resetting from the pressed state, refer to Figure 6 Under negative pressure, the discharge valve 42 elastically deforms, and the inner side of the large end is pressed against the outer wall of the mounting hole, thus separating the discharge channel 22 from the nozzle 41.

[0122] In some embodiments, refer to Figure 12 A third airtight groove 221 is provided circumferentially on the inner wall of the discharge port of the discharge channel 22. (Refer to...) Figure 14 and Figure 15 A third airtight rib 411 is provided circumferentially on the outer wall of the nozzle 41. (Refer to...) Figure 3 The nozzle 41 and the discharge port of the discharge channel 22 are sealed and connected by the third airtight rib 411 to the third airtight groove 221.

[0123] In some embodiments, the pump outer cover 10, the pump inner cover 20, the suction valve 30, and the one-way nozzle component 40 are all made of plastic.

[0124] When assembling the cosmetic bottle with the metering pump in this embodiment, refer to... Figure 16 Press the suction valve 30 into the discharge port of the suction channel 21 in the pump inner cover 20; press the discharge valve 42 in the one-way nozzle component 40 into the discharge channel 22 in the pump inner cover 20; align the positioning rib 23 of the pump inner cover 20 with the positioning groove 13 of the pump outer cover 10, and then press the pump inner cover 20 into the pump outer cover 10; press the nozzle 41 in the one-way nozzle component 40 into the discharge port of the discharge channel 22 to complete the assembly.

[0125] Example 2:

[0126] Reference Figures 17 to 21 This embodiment provides a single-valve metering pump for cosmetic bottles. The single-valve metering pump for cosmetic bottles is detachably connected to the bottle body. By pressing the single-valve metering pump for cosmetic bottles, a liquid, which is generally an emulsion, is squeezed out of the bottle body.

[0127] Compared with Example 1, the single-valve metering pump for cosmetic bottles in this embodiment has a different structure for the unidirectional nozzle component, while the rest of the structure is the same as that in Example 1, and will not be described again here.

[0128] Reference Figure 17 and Figure 20 In this embodiment, the one-way nozzle 40 and the pump cover 10 adopt a separate structure. The one-way nozzle 60 includes a nozzle 61 and an elastic discharge nozzle 62.

[0129] One end of the nozzle 61 is sealed to the discharge port of the discharge channel 22, and the other end of the nozzle 61 extends out of the discharge seat hole 111 of the pump outer cover 10.

[0130] A flexible discharge nozzle 62 is disposed inside the nozzle 61. One end of the flexible discharge nozzle 62 is open and connected to the discharge channel 22, while the other end of the flexible discharge nozzle 62 is provided with a discharge slit 621. A discharge hole is formed between the open end of the flexible discharge nozzle 62 and the discharge slit 621 at the other end. When the pressing part 12 is pressed down, refer to... Figure 18 When the suction valve 30 closes, the suction channel 21 is separated from the sealing cavity 50, while the discharge cut 621 opens, and the material in the sealing cavity 50 is ejected from the discharge cut 621 of the elastic discharge nozzle 62 through the discharge channel 22. During the resetting process of the pressing part 12 from the pressed state, refer to... Figure 19 When the discharge cut 621 closes, the material stops being ejected from the discharge port through the discharge channel 22, while the suction valve 30 opens, allowing the material to enter the sealed cavity 50 through the suction channel 21. Due to the design of the elastic discharge nozzle 62 in this embodiment, there is no need to add a discharge valve 42; the one-way nozzle 60 can achieve the purpose of pressing and spraying material by the pressing part 12.

[0131] In some embodiments, the nozzle 61 is made of hard plastic and the flexible discharge nozzle 62 is made of soft plastic.

[0132] In some embodiments, similar to Embodiment 1, a third airtight groove is provided circumferentially on the inner wall of the discharge port of the discharge channel 22. (Refer to...) Figure 20 A third airtight rib 611 is provided circumferentially on the outer wall of the nozzle 61. (Refer to...) Figure 17 The nozzle 61 and the discharge port of the discharge channel 22 are sealed and connected by the third airtight rib 611 to the third airtight groove.

[0133] When assembling the cosmetic bottle with the single-valve dispensing pump in this embodiment, refer to... Figure 21 Press the suction valve 30 into the discharge port of the suction channel 21 in the pump inner cover 20; align the positioning rib 23 of the pump inner cover 20 with the positioning groove 13 of the pump outer cover 10 and press the pump inner cover 20 into the pump outer cover 10; press the one-way nozzle 60 into the discharge port of the discharge channel 22 to complete the assembly.

[0134] Example 3:

[0135] Reference Figures 22 to 31 This embodiment provides a single-valve metering pump for cosmetic bottles. The single-valve metering pump for cosmetic bottles is detachably connected to the bottle body. By pressing the single-valve metering pump for cosmetic bottles, a liquid, which is generally an emulsion, is squeezed out of the bottle body.

[0136] Compared with Embodiment 1, the single-valve dispensing pump for cosmetic bottles in this embodiment has a different structure for the unidirectional nozzle component, and the snap-fit ​​connection between the pump outer cover 10 and the pump inner cover 20 has an adjustable fit design. The rest of the structure is the same as that in Embodiment 1, and will not be described again here.

[0137] Reference Figure 22 and Figure 26 In this embodiment, the one-way nozzle 40 and the pump outer cover 10 adopt an integral structure. The one-way nozzle 70 is integrally made with the pump outer cover 10. The nozzle 70 has a horizontally penetrating discharge hole 71 in the middle, which is connected to the discharge channel 22. The nozzle 70 protrudes from the side wall of the pump outer cover 10.

[0138] When the pressing part 12 is pressed down, refer to Figure 23 When the suction valve 30 closes, the suction channel 21 is separated from the sealing cavity 50, while the material in the sealing cavity 50 is ejected from the discharge hole 71 of the nozzle 70 through the discharge channel 22. During the resetting process of the pressing part 12 from the pressed state, refer to... Figure 24 Due to the negative pressure, the material will not flow out of the discharge hole 71. The material stops being ejected from the discharge port 71 through the discharge channel 22, while the suction valve 30 opens, causing the material to enter the sealing cavity 50 through the suction channel 21. In this embodiment, due to the one-piece nozzle 70 design, there is no need to add a discharge valve 42. The one-way nozzle can achieve the purpose of pressing and spraying material by the pressing part 12.

[0139] In some embodiments, refer to Figure 22 The discharge hole 71 is composed of several discharge hole segments connected in sequence. The diameter of the discharge hole segments gradually decreases from the inside to the outside, resulting in a progressive discharge hole.

[0140] In this embodiment, the discharge hole 71 is a progressive discharge hole, which can avoid the material from solidifying and becoming blocked due to prolonged static placement in a narrow and long channel, thus affecting its use.

[0141] In this embodiment, the inner side refers to the side of the discharge hole 71 closest to the discharge channel 22, and the outer side refers to the side of the discharge hole 71 furthest from the discharge channel 22. For example... Figure 22 As shown, taking the nozzle 70 integrally connected to the left side of the pump outer cover 10 as an example, the inner side refers to the right side and the outer side refers to the left side.

[0142] In some embodiments, refer to Figure 22 The diameter of the discharge hole section located at least on the outermost side is a fixed diameter, and the diameter of the discharge hole sections other than the outermost side is a fixed diameter or the diameter gradually decreases from the inside to the outside.

[0143] like Figure 22 As shown, the discharge orifice 71 consists of five sequentially connected discharge orifice segments, namely the first discharge orifice segment, the second discharge orifice segment, the third discharge orifice segment, the fourth discharge orifice segment, and the fifth discharge orifice segment, from the inside to the outside. The diameter of each discharge orifice segment decreases from the inside to the outside. Some discharge orifice segments have a fixed diameter, while others have a variable diameter. Figure 22 For example, the diameters of the second and fifth discharge hole sections are fixed, while the diameters of the first, third, and fourth discharge hole sections gradually decrease from the inside to the outside.

[0144] In some embodiments, refer to Figure 22 , Figures 33 to 35 At least the outermost discharge orifice section 711 has a fixed diameter. The orifice in the outermost discharge orifice section 711 is preferably a long, flat orifice rather than a circular orifice. The lateral length D of the outermost discharge orifice section 711 is 0.5mm to 7mm, preferably 0.5mm to 2.5mm. The longitudinal length E of the outermost discharge orifice section 711 is 0.8mm to 3mm. The height F of the outermost discharge orifice section 711 is 0mm to 0.2mm, preferably 0mm to 0.1mm. The Shore hardness value of the nozzle 70 is 30A to 90A. When the height F of the discharge orifice section 711 is 0mm, it is equivalent to a cut design on the outside of the nozzle 70 to form the discharge orifice section 711.

[0145] Taking the outermost discharge orifice section with a lateral length D of 0.8 mm, a longitudinal length E of 1.3 mm, a height F of 0.1 mm, and a Shore hardness of 60A for nozzle 70 as an example, a vacuum pump test was conducted on nozzle 70. Nozzle 70 achieved a vacuum pump with a pressure difference of -0.8 bar, equivalent to atmospheric pressure for 10-15 seconds. It is evident that by limiting the lateral length D and longitudinal length E of the outermost discharge orifice section and the Shore hardness of nozzle 70, nozzle 70 can be used as a relatively excellent valve body structure for negative pressure closure.

[0146] In some embodiments, the nozzle 70 is located on the lower side of the sealing cavity 50. That is, a first airtight structure forms the sealing cavity 50 on the inner side above the nozzle 70. This first airtight structure, for example in Embodiment 1, forms the sealing cavity 50 by sealingly connecting the first airtight surface 15 through a first airtight rib 25.

[0147] Reference Figure 25 and Figure 26 A fourth airtight rib 16 is circumferentially arranged on the inner wall of the pump outer cover 10 below the nozzle 70. In one example, a fourth airtight rib 16 is circumferentially arranged on the outer cover body 11 below the nozzle 70. (See reference...) Figure 27 and Figure 28 A fourth airtight surface 28 is circumferentially arranged on the outer wall of the pump inner cover 20 below the nozzle 70. (Refer to...) Figure 22 The pump outer cover 10 and pump inner cover 20 are sealed together by the fourth airtight rib 16 and the fourth airtight surface 28, respectively, on the inner side below the nozzle 70. In other words, a fourth airtight structure is present on the inner side below the nozzle 70. Thus, as... Figure 23 and Figure 24 As shown, there is an airtight space between the nozzle 70 and the pump inner cover 20, which is connected to the discharge channel 22.

[0148] In another example, a fourth airtight surface is provided around the inner side of the outer cover body 11 below the nozzle 70, and a fourth airtight rib is provided around the outer wall of the inner pump cover 20 below the nozzle 70. The outer cover 10 and the inner pump cover 20 are sealed together by the fourth airtight rib.

[0149] In some embodiments, one of the inner walls of the pump outer cover 10 and the outer wall of the pump inner cover 20 has at least two snap-fit ​​slots along its upper circumferential direction, and the other has at least one snap-fit ​​slot along its upper circumferential direction. When the uppermost snap-fit ​​slot engages with the uppermost snap-fit ​​slot to connect the pump outer cover 10 and the pump inner cover 20, the sealing cavity 50 has a first storage space. When the uppermost snap-fit ​​slot engages with the other snap-fit ​​slots to connect the pump outer cover 10 and the pump inner cover 20, the sealing cavity 50 has a second storage space, which is larger than the first storage space. With the above design, the adjustable distance between the pump inner cover 20 and the pump outer cover 10 allows for changes in the size of the storage space, thereby adjusting different discharge rates.

[0150] In one example, refer to Figure 25 and Figure 26 The inner wall of the pump outer cover 10 has three snap-fit ​​grooves arranged circumferentially, which are, from bottom to top, the first snap-fit ​​groove 141, the second snap-fit ​​groove 142, and the third snap-fit ​​groove 143. (Refer to...) Figure 27 and Figure 28 Two clips are provided circumferentially on the outer wall of the pump inner cover 20, namely the first clip 241 and the second clip 242 from bottom to top. (Refer to...) Figure 30 When the second latch 242 engages with the third latch groove 143, the first latch 241 engages with the first latch groove 141, and the sealing cavity 50 has a first storage space 50a. (Refer to...) Figure 29 When the second buckle 242 engages with the second buckle groove 142, the first buckle 241 is suspended between the pump outer cover 10 and the pump inner cover 20, and the sealing cavity 50 has a second storage space 50b, which is larger than the first storage space 50a.

[0151] like Figure 30 As shown, the maximum inner diameter of the first storage space 50a is A1, the distance from the top of the pump inner cover 20 to the top of the pump outer cover 10 is B1, and the distance from the bottom of the pump inner cover 20 to the bottom opening of the pump outer cover 10 is C1; Figure 29 As shown, the maximum inner diameter of the second storage space 50b is A2, which is greater than A1. The distance between the top of the pump inner cover 20 and the top of the pump outer cover 10 is B2, which is greater than B1. The distance between the bottom of the pump inner cover 20 and the bottom opening of the pump outer cover 10 is C2, which is less than C1. Therefore, it can be concluded that... Figure 30 The single-valve metering pump shown for cosmetic bottles represents a configuration with a relatively small discharge volume. Figure 29 The cosmetic bottle single-valve metering pump shown is a combination configuration with a large output.

[0152] When assembling the cosmetic bottle with the single-valve dispensing pump in this embodiment, refer to... Figure 31 and Figure 32Press the suction valve 30 into the discharge port of the suction channel 21 in the pump inner cover 20; align the positioning rib 23 of the pump inner cover 20 with the positioning groove 13 of the pump outer cover 10, and then press the pump inner cover 20 into the pump outer cover 10 to complete the assembly. Figure 31 and Figure 32 The difference in assembly is that, when pressing the inner pump cover 20 into the outer pump cover 10, if a distribution pump with a larger discharge capacity is required, then as follows: Figure 31 As shown, the second latch 242 is engaged with the second latch slot 142, and the first latch 241 is suspended between the pump outer cover 10 and the pump inner cover 20. At this time, the bottom of the pump inner cover 20 is almost flush with the bottom opening of the pump outer cover 10. If a distribution pump with a smaller discharge capacity is required, then as shown... Figure 32 As shown, the second buckle 242 is engaged with the third buckle slot 143, and the first buckle 241 is engaged with the first buckle slot 141. At this time, the bottom of the pump inner cover 20 is located at a greater distance inside the pump outer cover 10. When using the pump, the user can also determine whether the current distribution pump is in a larger or smaller output state based on whether the bottom of the pump inner cover 20 is embedded at a greater distance inside the pump outer cover 10.

[0153] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A single valve metering pump for cosmetic bottles, characterized in that, The single-valve dispensing pump for cosmetic bottles includes: Pump outer cover, the pump outer cover having a resilient pressing part; The pump inner cover is disposed inside the pump outer cover and its top forms a sealed cavity with the pump outer cover. The pump inner cover has a suction channel and a discharge channel, and one end of the discharge channel is connected to the sealed cavity. A suction valve is located below the pressing part and is disposed at the outlet of the suction channel. The suction channel is connected to or separated from the sealing cavity through the suction valve. A one-way nozzle assembly includes a nozzle, a transversely penetrating discharge hole is provided in the center of the nozzle, the inlet of the discharge hole is connected to the other end of the discharge channel, and the outlet of the discharge hole extends out of the pump cover. When the pressing part is pressed down, the suction valve closes, causing the suction channel to be separated from the sealing cavity. The material in the sealing cavity is ejected from the discharge port of the discharge hole through the discharge channel. When the pressing part is reset from the pressed state, the material stops being ejected from the discharge port of the discharge hole through the discharge channel, and the suction valve opens, causing the material to enter the sealing cavity through the suction channel.

2. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The middle part of the pressing part has an upward-convex arc-shaped structure.

3. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The pump outer cover includes an outer cover body, which is a cylindrical structure with openings at the top and bottom. A discharge seat hole is provided on the circumferential side of the outer cover body, and the discharge port of the discharge hole extends out of the discharge seat hole. The pressing part is provided on the top of the outer cover body.

4. The single valve metering pump for a cosmetic bottle according to claim 3, wherein The outer cover body and the pressing part are made of thermoplastic elastomer.

5. The single valve metering pump for a cosmetic bottle according to claim 4, wherein The outer cover body and the pressing part are made as one piece.

6. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The pump inner cover, the suction channel, and the discharge channel are made as a single unit.

7. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The pump outer cover, the pump inner cover, the suction valve, and the one-way nozzle are all made of all-plastic structure.

8. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The outer wall of the pump cover and the outer wall of the inner wall of the pump cover are provided with a positioning groove and the other is provided with a positioning rib. The positioning of the outer wall of the pump cover and the inner wall of the pump is achieved by inserting the positioning rib into the positioning groove.

9. The single valve metering pump for a cosmetic bottle according to claim 1, wherein One of the inner wall of the pump outer cover and the outer wall of the pump inner cover has a snap-fit ​​groove along its upper circumferential direction, and the other has a snap-fit ​​along its upper circumferential direction. The connection between the pump outer cover and the pump inner cover is achieved by the snap-fit ​​groove engaging with the snap-fit ​​groove.

10. The single valve metering pump for a cosmetic bottle according to claim 1, wherein One of the inner wall of the pump outer cover and the outer wall of the pump inner cover has a first airtight surface arranged circumferentially along its upper edge, and the other has a first airtight rib arranged circumferentially along its upper edge. The first airtight rib is used to seal and connect the first airtight surface to form the sealing cavity.

11. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The discharge port of the suction channel is connected to the top surface of the pump inner cover. The top surface of the pump inner cover has a second airtight surface, which surrounds the discharge port of the suction channel. The bottom surface of the suction valve has a suction valve airtight surface. When the pressing part is pressed down, the suction valve airtight surface seals and connects to the second airtight surface, thereby separating the suction channel from the sealing cavity.

12. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The discharge channel adopts an L-shaped or Z-shaped structure. The top or top side inlet of the discharge channel is connected to the sealed cavity, and the side or bottom side outlet of the discharge channel is connected to the inlet of the discharge hole.

13. The single valve metering pump for a cosmetic bottle according to claim 1, wherein The lower part of the pump inner cover is a hollow structure, and the suction channel passes through the hollow structure; the hollow structure at the lower part of the pump inner cover has a connection part that can be detachably connected to the bottle mouth of the cosmetic bottle.

14. The single valve metering pump for a cosmetic bottle according to claim 13, wherein The connecting part is an internal thread, a connecting buckle, or a connecting groove.

15. The single valve metering pump for a cosmetic bottle according to claim 13, wherein The hollow structure has a gasket at its top.

16. The single valve metering pump for a cosmetic bottle according to any one of claims 1 to 15, characterized in that, The one-way nozzle and the pump cover are separate structures. One end of the nozzle is sealed to the discharge port of the discharge channel, and the other end of the nozzle extends out of the pump cover. The one-way nozzle also includes an elastic discharge nozzle, which is disposed inside the nozzle. One end of the elastic discharge nozzle is open and connected to the discharge channel, and the other end of the elastic discharge nozzle is provided with a discharge slit. The discharge hole is located between the opening at one end of the elastic discharge nozzle and the discharge slit at the other end of the elastic discharge nozzle. When the pressing part is pressed down, the discharge slit opens, causing the material in the sealed cavity to be ejected from the discharge slit of the elastic discharge nozzle through the discharge channel. When the pressing part returns to its original state, the discharge slit closes.

17. The single valve metering pump for a cosmetic bottle according to claim 16, wherein The nozzle is made of hard rubber, and the elastic discharge nozzle is made of soft rubber.

18. The single-valve metering pump for cosmetic bottles as described in claim 16, characterized in that, The inner wall of the discharge port of the discharge channel and the outer wall of the nozzle are provided with a third airtight groove along the upper circumferential direction on one side and a third airtight rib along the upper circumferential direction on the other side. The nozzle and the discharge port of the discharge channel are sealed and connected by the third airtight rib to the third airtight groove.

19. A single valve pump for a cosmetic bottle according to any one of claims 1 to 15, wherein The one-way nozzle and the pump outer cover are integrally formed, and the nozzle protrudes from the side wall of the pump outer cover.

20. The single valve metering pump for a cosmetic bottle according to claim 19, wherein The discharge hole is composed of several discharge hole segments connected in sequence. The diameter of the discharge hole segments gradually decreases from the inside to the outside, so that the discharge hole forms a progressive discharge hole.

21. The single valve metering pump for a cosmetic bottle according to claim 20, wherein The diameter of at least the outermost discharge orifice section is a fixed diameter, and the diameters of the other discharge orifice sections, excluding the outermost discharge orifice section, are either fixed or gradually decrease from the inside to the outside.

22. The single valve metering pump for a cosmetic bottle according to claim 21, wherein The outermost discharge hole section has a lateral length D of 0.5mm to 7mm, a longitudinal length E of 0.8mm to 3mm, a height F of 0mm to 0.2mm, and a Shore hardness value of 30A to 90A.

23. The single-valve metering pump for cosmetic bottles as described in claim 22, characterized in that, The lateral length D of the outermost discharge hole section is 0.5mm~2.5mm; The height F of the outermost discharge hole section is 0mm~0.1mm.

24. The single-valve metering pump for cosmetic bottles as described in claim 19, characterized in that... The nozzle is located on the lower side of the sealing cavity; one of the inner wall of the pump outer cover and the outer wall of the pump inner cover on the inner side below the nozzle is provided with a fourth airtight surface along the upper circumferential direction, and the other is provided with a fourth airtight rib along the upper circumferential direction. The pump outer cover and the pump inner cover on the inner side below the nozzle are sealed and connected by the fourth airtight rib.

25. The single-valve metering pump for cosmetic bottles as described in claim 24, characterized in that... The pump outer cover inner wall and the pump inner cover outer wall have at least two snap-fit ​​slots along their upper circumferential direction and at least one snap-fit ​​slot along their upper circumferential direction. When the uppermost snap-fit ​​slot engages with the uppermost snap-fit ​​slot to connect the pump outer cover and the pump inner cover, the sealing cavity has a first storage space. When the uppermost snap-fit ​​slot engages with the other snap-fit ​​slots (excluding the uppermost snap-fit ​​slot) to connect the pump outer cover and the pump inner cover, the sealing cavity has a second storage space, which is larger than the first storage space.

26. The single valve metering pump for a cosmetic bottle according to claim 25, wherein The latching slots are three in number, and from bottom to top they are a first latching slot, a second latching slot, and a third latching slot; the latches are two in number, and from bottom to top they are a first latching slot and a second latching slot; when the second latching slot engages with the third latching slot, the first latching slot engages with the first latching slot, and the sealing cavity has a first material storage space; when the second latching slot engages with the second latching slot, the first latching slot is suspended between the pump outer cover and the pump inner cover, and the sealing cavity has a second material storage space.

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