Liquid dispenser

Abstract

The invention relates to a liquid dispenser used in combination with a container. The liquid dispenser comprises a pump unit and a circular cavity, wherein the pump unit is provided with a rotary control part, a flow path part, a pumping system and an arc-shaped channel; the flow path part is inserted into the circular cavity and can be rotated back and forth by the rotary control part among a plurality of default flow path positions, so that the arc-shaped channel and the inlet / outlet of the pumping system can be communicated with the inside of the container and the outside in a rotary control manner, and a plurality of fluid passages with different paths are formed; furthermore, the pump unit can define a buffer chamber in the circular cavity, the buffer chamber can form a ventilation path with exhaust and residual liquid recovery functions, and a multi-purpose feeding chamber can be constructed above the buffer chamber, and the feeding chamber can be used for filling or metering and storing liquid or blending substances related to the container.

Description

Technical Field

[0001] This invention relates to a liquid dispenser used in conjunction with a liquid container, and more particularly to a liquid dispenser in which the pump unit can be rotated to form multiple flow paths, allowing the liquid in the container to be selectively dispensed and used in multiple modes; furthermore, the pump unit can define a buffer chamber, which is used to construct a feed chamber for filling or storing liquids or preparation substances associated with the container. Background Technology

[0002] For a long time, dispensers used with liquid containers have been generally divided into two types: flow-out and spray-out. Although both types of dispensers can release liquids, they have the following drawbacks: For example, when using a flow-out dispenser, it is not possible to evenly distribute liquids (such as olive oil, soy sauce, cooking oil, various seasonings or condiments) to the target area (such as the surface of baked bread, the surface of a frying pan, or the surface of various foods), and the amount of liquid poured out is not easy to control; on the other hand, when using a spray-out dispenser, it is not possible to release large amounts of liquid quickly (such as releasing large amounts quickly into a pot, mixing bowl, or washing basin), and because the spray area is large, it is not conducive to dispensing liquid to small target areas (such as dispensing condiments onto small dishes, or dispensing detergent or cleaning agents onto small stains on fabrics or items). Because of these drawbacks of each type of dispenser, consumers have no choice but to keep both types of dispensers on hand and choose one to use as needed.

[0003] In addition, neither of these dispensers can measure and dispense the liquid in the container. Consumers must purchase a separate measuring cup to measure and dispense the liquid, which is not only inconvenient but also increases the hassle of cleaning and storing the measuring cup.

[0004] In addition, through long-term use and observation, the inventors have found that traditional sprayers still have the following problems that need to be solved:

[0005] Here we will first understand the structure and operation of a traditional sprayer. Please refer to [link / reference]. Figure 50a and 50bThe conventional sprayer 90 shown in the diagram is equipped with a trigger-actuated pump. The piston 91 of the pump moves in and out of the pump chamber P due to the alternating action of the trigger 97 and the return spring 92, thereby generating a positive pressure and a negative pressure in the pump chamber P. The suction force of the negative pressure draws liquid L from the container into the pump chamber P through a suction tube 10c for temporary storage; the thrust force of the positive pressure pushes the liquid out of the pump chamber to the nozzle 98 for spraying. When the liquid is ejected, a vacuum phenomenon with negative pressure suction is generated in the container 10. Since the negative pressure in the container 10 will counteract the negative pressure in the pump chamber P, the negative pressure suction of the pump chamber P will no longer be able to draw the liquid L in the container 10. To this end, the pump cylinder 93 of the pump chamber P is provided with a vent 96 that is normally closed by the piston 91. When the piston 91 is pushed to the second position, the vent 96 will be exposed so that outside air can enter the container 10 through the vent 96 to eliminate the vacuum phenomenon in the container.

[0006] Having understood the structure and operation of the conventional sprayer 90, we will now analyze the problems and deficiencies of the sprayer 90.

[0007] For example, when the sprayer 90 sprays liquid downwards, the liquid L in the container will leak out through the vent 96 when the piston 91 is pushed to the second position (e.g., Figure 50b This can cause severe contamination of the user's palms.

[0008] For example, when the sprayer 90 is used to spray viscous liquids (such as cooking oil, olive oil, seasonings, baking agents, mold release agents, skin care agents, medical agents, cleaning agents, waxing agents, detergents, herbicides, lubricants, and other similar agents), the viscous liquid will stick to the nozzle 98 and then flow down to the grip area, seriously contaminating the user's palm. This makes the sprayer 90 unsuitable for spraying viscous liquids, thus greatly reducing its uses and causing manufacturers to lose a great deal of business opportunities.

[0009] For example, when the sprayer 90 is flipped over to spray liquid downwards, the suction inlet at the bottom of the suction pipe 10c will be exposed above the liquid surface due to the reverse orientation, causing the suction pipe 10c to be unable to draw liquid and thus interrupting the spraying operation.

[0010] For example, when the liquid in the container is used up to a level that the straw 10c cannot reach, if it is discarded, the container will contain residual liquid, which is not only wasteful but also detrimental to the environment. If the user wants to refill the liquid and reuse it, the sprayer 90 must be removed from the container, and the exposed straw 10c will leak liquid from the tube, which will contaminate the work area.

[0011] For example, since the suction tube 10c of the sprayer 90 extends into the container 10, the manufacturer cannot seal the opening of the container 10 with a sealing component after filling the liquid product into the container 10. Without a seal, the liquid is prone to leakage during logistics and sales, and the liquid product cannot obtain a safe and reliable quality guarantee, thereby reducing the product's shelf life.

[0012] Based on the above, there is a need for a method and device that can completely solve many problems of traditional applicators or sprayers. Summary of the Invention

[0013] Therefore, the present invention aims to provide a liquid dispenser with a pump unit capable of multiple dispensing modes to meet the user's needs. To this end, the liquid dispenser includes: a grip portion with a container attached to its bottom; a circular cavity that is radially concave in front of the grip portion and has an outlet opening, used to house the pump unit and define a buffer chamber; and a release portion disposed above the circular cavity, comprising an outlet nozzle and a nozzle, each having an outlet channel and a pumping channel communicating downwards with the circular cavity.

[0014] The pump unit has a rotary control section, a flow path section inserted into a circular cavity, an arc-shaped channel located on the outer periphery of the flow path section and containing a channel narrowing section, and a pumping system. The flow path unit can be rotated to multiple default flow path positions. In one flow path position, the liquid in the container flows out in a large volume from the outlet through the outlet opening, the arc-shaped channel, and the outlet channel. In another flow path position, the liquid in the container flows out in a controllable amount from the outlet through the outlet opening, the arc-shaped channel, the channel narrowing section, and the outlet channel. In yet another flow path position, the liquid in the container is pumped out from the nozzle in a spraying mode through the outlet opening, the pumping system, and the pumping channel. In yet another flow path position, the liquid in the container flows out from the outlet through the outlet opening, the pumping system, and the outlet channel in a pumped flow mode. Since the amount of liquid pumped out from the pump chamber of the pumping system each time is fixed (e.g., 2cc), the user can dispense the desired amount of liquid from the outlet based on the number of pumps.

[0015] Another objective of this invention is to provide a liquid dispenser with a pump unit that addresses various shortcomings of conventional sprayers. To this end, the inlet of the pumping system of this pump unit is designed to be fluidly coupled to the outlet opening, allowing the liquid in the container to be completely pumped out through the outlet opening without the need for a suction tube, thus solving many problems caused by the suction tube in conventional sprayers. Furthermore, the buffer chamber can construct a venting path that not only balances the pressure difference between the inside of the container and the outside, but also receives residual liquid from the nozzle and outlet and returns it to the inside of the container, thus solving the problem of liquid leakage in conventional sprayers. In addition, since this liquid dispenser does not require a suction tube, manufacturers can use a sealing assembly to seal the container opening, thus solving the problem that the container opening of conventional sprayers cannot be sealed. It is worth noting that since residual liquid from the nozzle and outlet of this invention does not leak, manufacturers can fill the container with the aforementioned viscous liquid, enabling them to obtain significant business opportunities in the production and sale of viscous liquid products.

[0016] Another object of the present invention is to provide a liquid dispenser with a pump unit capable of real-time preparation of a formulation. For this purpose, the buffer chamber is utilized as an inlet channel with an openable / closeable flow path, above which a feeding chamber is provided, allowing the feeding chamber to be paired with a lower container to form a mother-daughter container set. Thus, when the flow path is in a preset flow path position, the inlet channel is closed, allowing the manufacturer to pre-store the formulation material or concentrate in the feeding chamber (daughter container); when the consumer uses it, they can rotate the control unit to another flow path position to open the inlet channel, allowing the formulation material or concentrate stored in the feeding chamber to flow downwards through the inlet channel into the container (mother container) to mix with the formulation liquid in the container to prepare a formulation. Since the consumer only prepares the formulation when needed, it has a real-time preparation and use preservation effect.

[0017] Another object of the present invention is to provide a liquid dispenser with a pump unit that is easy to fill with liquid and can spray liquid in multiple directions. For this purpose, the feed chamber is used as a filling funnel, so that the user can conveniently fill the container directly from the feed chamber downwards. Since the user does not need to remove the container when filling the liquid, it is suitable to arrange a set of bidirectional liquid-drawing units at the bottom of the circular cavity, so that the liquid dispenser can draw liquid at angles ranging from vertical to inverted, thereby performing multidirectional liquid spraying operations.

[0018] Another object of the present invention is to provide a liquid dispenser with a pump unit capable of metering and dispensing liquids, thereby solving the problem that conventional dispensers cannot meter and dispense liquids. To this end, the dispensing section is provided with a metering chamber; when the flow path section is rotated to another flow path position by the control section, the pumping system of the pump unit can pump the liquid in the container to the metering chamber for metering and temporary storage, and then dispense it from the outlet, thus easily obtaining the desired metered liquid.

[0019] Further objectives, effects, and advantages of the present invention will be described in detail below with reference to preferred embodiments of the invention and in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the liquid applicator according to the first embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0021] Figure 2 It is a drawing Figure 1 A three-dimensional view of the pump unit, illustrating that liquid is pumped out from the second pump outlet.

[0022] Figure 3 yes Figure 1 A cross-sectional view of the liquid dispenser during assembly or disassembly.

[0023] Figure 4 yes Figure 3 Exploded cross-sectional view of the pump unit.

[0024] Figure 5 yes Figure 1 Cross-sectional view of the liquid applicator.

[0025] Figure 6a It depicts the seepage inside the container dripping from the vent into the buffer chamber for temporary storage.

[0026] Figure 6b yes Figure 5 The diagram illustrates the use of the liquid, showing that it is pumped out quantitatively from the outlet through the second pump outlet.

[0027] Figure 6c This illustrates how residual liquid from the nozzle or outlet can flow back into the container through the ventilation path.

[0028] Figure 7a It is a drawing Figure 5 The pump unit was rotated to the second flow path position.

[0029] Figure 7b yes Figure 7a A three-dimensional view of the pump unit, illustrating that liquid is pumped out from the first pump outlet.

[0030] Figure 7c yes Figure 7aA schematic diagram of its use shows the liquid being sprayed out of the nozzle through the first pump outlet.

[0031] Figure 8a yes Figure 5 The pump unit was rotated to the third flow path position.

[0032] Figure 8b yes Figure 8a A three-dimensional view of the pump unit, illustrating the liquid flowing out from the narrowing section of the channel.

[0033] Figure 8c yes Figure 8a The diagram shows the liquid being released in a small amount from the outlet as it passes through the narrowing section of the channel.

[0034] Figure 9a It is a drawing Figure 5 The pump unit was rotated to the fourth flow path position.

[0035] Figure 9b yes Figure 9a A three-dimensional diagram of the pump unit, illustrating the liquid flowing out from the arc-shaped channel.

[0036] Figure 9c yes Figure 9a The diagram illustrates the use of the liquid, showing it flowing out in large quantities from the outlet through an arc-shaped channel.

[0037] Figure 10a It is similar Figure 1 A variant example of a liquid dispenser, which shows that the body of the outlet is enlarged, while the nozzle is positioned inside the outlet channel of the outlet.

[0038] Figure 10b yes Figure 10a Cross-sectional view of the liquid applicator.

[0039] Figure 11a It is similar Figure 1 Another variant of the liquid dispenser features an axially recessed groove at the tip of the nozzle.

[0040] Figure 11b yes Figure 11a A cross-sectional view of a liquid dispenser showing a rotator engaging a slot to control the nozzle.

[0041] Figure 12 This is a three-dimensional view of the liquid applicator according to the second embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0042] Figure 13 yes Figure 12 Cross-sectional view of the liquid applicator.

[0043] Figure 14 yes Figure 13 A three-dimensional view of the pump unit, illustrating that liquid can be pumped out from the first pump outlet or flow out from the arc-shaped channel.

[0044] Figure 15 yes Figure 13 A three-dimensional view of the flow path opening and closing mechanism.

[0045] Figure 16 yes Figure 13 Exploded cross-sectional view of the pump unit.

[0046] Figure 17a yes Figure 13 One of the usage diagrams illustrates how liquid is ejected when the elastic bladder is pressed.

[0047] Figure 17b yes Figure 13 Another usage diagram illustrates how liquid flows out when the button is pressed.

[0048] Figure 18a It is a drawing Figure 13 A schematic diagram showing the pump unit being rotated to the second flow path position.

[0049] Figure 18b yes Figure 18a A three-dimensional schematic diagram of the pump unit's operation.

[0050] Figure 19a It is a drawing Figure 13 A schematic diagram showing the pump unit being rotated to the third flow path position.

[0051] Figure 19b yes Figure 19a A three-dimensional schematic diagram of the pump unit's operation.

[0052] Figure 20 This is a three-dimensional view of the liquid applicator according to the third embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0053] Figure 21 yes Figure 20 A partial cross-sectional view of the liquid dispenser, showing a small container in the feed chamber.

[0054] Figure 22 yes Figure 20 A cross-sectional view of the liquid dispenser, showing multiple small containers in the feed chamber.

[0055] Figure 23a yes Figure 20 A schematic diagram of its cross-section, showing it in the process of feeding or filling.

[0056] Figure 23b yes Figure 23a A three-dimensional schematic diagram of the pump unit's operation.

[0057] Figure 24a yes Figure 23a A schematic diagram showing the pump unit being rotated to the second flow path position.

[0058] Figure 24b yes Figure 24a A three-dimensional schematic diagram of the pump unit's operation.

[0059] Figure 25a yes Figure 23a A schematic diagram showing the pump unit being rotated to the third flow path position.

[0060] Figure 25b yes Figure 25a A three-dimensional schematic diagram of the pump unit's operation.

[0061] Figure 26 This is a three-dimensional view of the liquid applicator according to the fourth embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0062] Figure 27a yes Figure 26 A cross-sectional view of the liquid applicator.

[0063] Figure 27b yes Figure 27a A 3D view of the pump unit.

[0064] Figure 28a yes Figure 27a A schematic diagram showing the pump unit being rotated to the second flow path position.

[0065] Figure 28b yes Figure 28a A three-dimensional schematic diagram of the pump unit's operation.

[0066] Figure 29a yes Figure 27a A schematic diagram showing the pump unit being rotated to the third flow path position.

[0067] Figure 29b yes Figure 29a A three-dimensional schematic diagram of the pump unit's operation.

[0068] Figure 30a yes Figure 27a A schematic diagram showing the pump unit being rotated to the fourth flow path position.

[0069] Figure 30b yes Figure 30a A three-dimensional schematic diagram of the pump unit's operation.

[0070] Figure 31 This is a three-dimensional view of the liquid applicator according to the fifth embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0071] Figure 32a yes Figure 31A cross-sectional view of a liquid dispenser, showing a closure that seals the liquid in the upper through-hole.

[0072] Figure 32b yes Figure 32a A 3D view of the pump unit.

[0073] Figure 33a yes Figure 32a A schematic diagram of a liquid applicator in use, showing it performing a metering filling operation.

[0074] Figure 33b yes Figure 32a Another schematic diagram of the liquid dispenser shows that when the button is accidentally pressed, the pumped liquid flows back into the container through the pump return path.

[0075] Figure 34a yes Figure 32a A schematic diagram showing the pump unit being rotated to the second flow path position for feeding.

[0076] Figure 34b yes Figure 34a A three-dimensional schematic diagram of the pump unit's operation.

[0077] Figure 35a yes Figure 32a A schematic diagram showing the pump unit being rotated to the third flow path position.

[0078] Figure 35b yes Figure 35a A three-dimensional schematic diagram of the pump unit's operation.

[0079] Figure 36 This is a perspective view of the liquid applicator according to the sixth embodiment of the present invention, wherein the pump unit is located in the first flow path position; the trigger is drawn with schematic lines to show the internal configuration that is obscured by it.

[0080] Figure 37a yes Figure 36 A schematic diagram of the cross-section, showing a feeding or filling operation in progress.

[0081] Figure 37b yes Figure 37a A three-dimensional schematic diagram of the pump unit's operation.

[0082] Figure 37c It is along Figure 37a A schematic diagram obtained from the S1–S1 cross section.

[0083] Figure 38 yes Figure 37a An exploded view of the bidirectional liquid-drawing unit shown.

[0084] Figure 39a yes Figure 37a The pump unit was rotated to the second flow path position.

[0085] Figure 39b yes Figure 39a A three-dimensional schematic diagram of the pump unit's operation.

[0086] Figure 39c yes Figure 39a A diagram illustrating its usage.

[0087] Figure 40a yes Figure 37a A schematic diagram showing the pump unit being rotated to the third flow path position.

[0088] Figure 40b yes Figure 40a A three-dimensional schematic diagram of the pump unit's operation.

[0089] Figure 40c It is Figure 40a The circled area is shown in enlarged detail.

[0090] Figure 41a yes Figure 40a Exploded cross-sectional view of the pump unit.

[0091] Figure 41b yes Figure 41a Exploded view of the piston telescopic module.

[0092] Figure 41c yes Figure 41a A 3D view of a composite valve.

[0093] Figure 42 It is a drawing Figure 40a A schematic diagram of the operation of a liquid applicator spraying liquid downwards.

[0094] Figure 43 This is a three-dimensional view of the liquid applicator according to the seventh embodiment of the present invention, wherein the pump unit is located in the first flow path.

[0095] Figure 44 yes Figure 43 A schematic diagram of the operation of a liquid applicator in cross-section.

[0096] Figure 45 yes Figure 44 A three-dimensional schematic diagram of the pump unit's operation.

[0097] Figure 46 It is a drawing Figure 44 Exploded cross-sectional view of the pump unit.

[0098] Figure 47 It is a drawing Figure 46 Assembly diagram of the valve assembly and piston telescopic module of the pump unit.

[0099] Figure 48a yes Figure 44A schematic diagram showing the pump unit being rotated to the second flow path position.

[0100] Figure 48b yes Figure 48a A three-dimensional schematic diagram of the pump unit's operation.

[0101] Figure 48c It is Figure 48a The circled area is shown in enlarged detail.

[0102] Figure 49a yes Figure 44 A schematic diagram showing the pump unit being rotated to the third flow path position.

[0103] Figure 49b yes Figure 49a A three-dimensional schematic diagram of the pump unit's operation.

[0104] Figure 49c It is Figure 49a The circled area is shown in enlarged detail.

[0105] Figure 50a This is a cross-sectional view of a traditional sprayer.

[0106] Figure 50b yes Figure 50a The diagram shows the use of the sprayer, indicating that liquid is leaking from the vent.

[0107] Explanation of reference numerals in the attached figures:

[0108] 10: Container;

[0109] 10a: Container opening;

[0110] 10b: Sealing assembly;

[0111] 10c: straw;

[0112] 11,21,24,27,31: Nozzle;

[0113] 11a, 31a: Pump outlet channels;

[0114] 12, 22, 32: Flowing out of the mouth;

[0115] 12a, 22a, 32a: Outflow channels;

[0116] 13,33: Slope;

[0117] 13a, 33a: Inclined through holes;

[0118] 13b, 33b: Diversion channel;

[0119] 14, 28, 34: Capping;

[0120] 15, 29: Inner ring flange;

[0121] 16,28a: Cap seat;

[0122] 25a: Card slot;

[0123] 25b: Rotator;

[0124] 27a: Lug;

[0125] 35: Inner ring flange;

[0126] 36: Annular cover seat;

[0127] 37: Outer ring flange;

[0128] 38: Oriented components;

[0129] 39: Annular seal;

[0130] 100, 200, 300, 400, 500, 600, 700: Liquid applicators;

[0131] 101, 201, 301, 401, 501, 601, 701: Grip section;

[0132] 103, 203, 303, 403, 503, 603, 703: Release section;

[0133] 103a, 203a: Opening at the front end;

[0134] 104, 204, 304, 404, 504, 604, 704: Circular cavity;

[0135] 104a: Forward extension;

[0136] 105, 205, 305, 405, 605, 705: Outflow opening;

[0137] 107,707: Vent hole;

[0138] 109a: Arc-shaped concave area;

[0139] 109b: Positioning groove;

[0140] 110, 210, 310, 410, 510, 610, 710: Pump units;

[0141] 111,211,311,411,511,611,711: Flow path part;

[0142] 112,212,312,412,512,612,712: Rotation control unit;

[0143] 113,613: Front circular cavity;

[0144] 114, 614, 714: Rear circular cavity;

[0145] 115, 215, 315, 415, 515, 615, 715: Elastic positioning components;

[0146] 116,616: Pump chamber sidewall;

[0147] 120, 320, 420, 520, 620, 720: Pistons;

[0148] 121,321,421,621: Pump inlet;

[0149] 122,322,422,522: Annular flow channels;

[0150] 123,323,423,523: Pump inlet channel;

[0151] 126,226,326,426,526,726: Pump chamber outlet;

[0152] 128,228,528,728: First pump outlet;

[0153] 129,229,529,729: Second pump outlet;

[0154] 131,231,331,431,531,631,731: One-way inlet valve;

[0155] 132,232,332,432,532,732: One-way outlet valve;

[0156] 134,634: Annular base;

[0157] 140, 340, 440, 540, 740: Buttons;

[0158] 141: Putter;

[0159] 142: Annular sealing assembly;

[0160] 145: Inner ring flange;

[0161] 146: Outer ring flange;

[0162] 149,649,749: Return spring;

[0163] 150, 250, 350, 450, 550, 650, 750: Arc-shaped channel;

[0164] 151,251: Channel narrowing section;

[0165] 206: Perforation;

[0166] 206a: Air guide groove;

[0167] 207: Tapered hole;

[0168] 209, 609, 709: Drainage holes;

[0169] 213: Valve cavity;

[0170] 213a: Front face;

[0171] 220: Elastic capsule;

[0172] 223: First pump inlet channel;

[0173] 224: Second pump inlet channel;

[0174] 260: Flow path opening and closing mechanism;

[0175] 261: Button;

[0176] 262: Putter;

[0177] 263: Conical seat;

[0178] 265: Flexible arm;

[0179] 267: Enclosed seat; 269: Incision;

[0180] 306, 406, 506, 606: Top through hole;

[0181] 307, 407, 507, 607: Bottom through hole;

[0182] 328, 428, 628: Pump outlet;

[0183] 353, 453, 653: Air guide holes for pumping out;

[0184] 354, 454, 654: Vent holes for outflow;

[0185] 360, 460, 560: Enclosures;

[0186] 380, 480, 580, 680: Feeding room;

[0187] 381, 382, ​​383, 384, 385: Small containers;

[0188] 386, 486, 586, 686: Top cover;

[0189] 389, 489, 589, 689: Blending substances;

[0190] 436,536: Ventilation trench;

[0191] 457, 458: Vent holes;

[0192] 508: Exhaust port;

[0193] 509a: Drainage hole;

[0194] 509b: Reflux port;

[0195] 521a, 721a: First pump inlet;

[0196] 521b, 721b: Second pump inlet;

[0197] 553: Air vent;

[0198] 581,781: Measurement scale;

[0199] 604a: Rear extension;

[0200] 609a: Draw-in connector;

[0201] 611a: Extended segment;

[0202] 618: Ring-shaped card holder;

[0203] 619: Positioning groove;

[0204] 623: Valve seat;

[0205] 624, 724: Piston telescopic module;

[0206] 626: Pump room inlet and outlet;

[0207] 627a: Valve seat inlet;

[0208] 627b: Valve seat outlet;

[0209] 629: Piston rod;

[0210] 635: Through hole;

[0211] 637: Incision;

[0212] 638: Circular plug;

[0213] 640: Push button;

[0214] 648: Ring-shaped base;

[0215] 652: Large through hole;

[0216] 660: Trigger;

[0217] 661: Pivot hole;

[0218] 664: Putter;

[0219] 666: Pivot;

[0220] 667: Pivot;

[0221] 670: Two-way liquid suction unit;

[0222] 671: Positive water intake;

[0223] 672: Reverse suction inlet;

[0224] 673: Shared Exit;

[0225] 675: Tee body;

[0226] 676: Filter screen;

[0227] 678, 679: Ball valves;

[0228] 703a: Metrology Laboratory;

[0229] 703b: Release Seat;

[0230] 706: Ventilation duct;

[0231] 730: Composite valve;

[0232] 716: Through hole;

[0233] 741: Piston rod;

[0234] 760: Valve assembly;

[0235] 761: Inlet valve seat;

[0236] 761a: First valve seat through hole;

[0237] 761b: Second valve seat through hole;

[0238] 762: Outlet valve seat;

[0239] 764: Circular plug-shaped base;

[0240] 764a: First base through hole;

[0241] 764b: Second base through hole;

[0242] 783: Metering inlet;

[0243] 785: Pump outlet pipe;

[0244] 787: Inflow opening;

[0245] A: Air;

[0246] B: After;

[0247] C: Axial centerline;

[0248] D: Down;

[0249] F: front;

[0250] L: Liquid;

[0251] L2: Formulation agent;

[0252] LB: Bubble;

[0253] LD: Residual liquid;

[0254] LS: Exudate;

[0255] M1: Pump discharge indicator;

[0256] M2: Pumping ejection indicator;

[0257] M3: Indicator of small outflow;

[0258] M4: Indicator of large outflow;

[0259] M5: Material feed indicator;

[0260] M6: Closure sign;

[0261] M7: Pumping metering mark;

[0262] MF: Large outflow;

[0263] P1, P2, P3, P4, P5, P6, P7: Pump chambers;

[0264] PC: Pumping metering;

[0265] PF: Pumped outflow;

[0266] PP: Positive pressure;

[0267] PS: Pumped out;

[0268] R1, R2, R3, R4, R5, R6, R7: Buffer chambers;

[0269] SF: Small outflow;

[0270] T: Indicator;

[0271] U: up;

[0272] VT: Virtual indicator;

[0273] WA1, WA2, WA5, WA7: Ventilation paths;

[0274] WA3a, WA4a, WA6a: Ventilation paths for outflow;

[0275] WA3b, WA4b, WA6b: Ventilation paths for pumping out;

[0276] WL3, WL4, WL5, WL6: Feed path;

[0277] WMF1, WMF2, WMF3, WMF4, WMF6, WMF7: Large outflow paths; WP3, WP4, WP6: Pumping paths;

[0278] WP1a, WP2a, WP7a: First pumping path;

[0279] WP1b, WP2b, WP7b: Second pumping path;

[0280] WP5a: Pumping release path;

[0281] WP5b: Pumping return path;

[0282] WSF1, WSF2: Small outflow paths;

[0283] WPP: Positive pressure discharge path;

[0284] Symbol explanation for traditional sprayers:

[0285] 90: Traditional sprayer;

[0286] 91; Piston;

[0287] 92: Return spring;

[0288] 93: Pump cylinder;

[0289] 94: One-way inlet valve;

[0290] 95: One-way outlet valve;

[0291] 96: Vent hole;

[0292] 97: Trigger;

[0293] 98: Nozzle;

[0294] P: Pump chamber. Detailed Implementation

[0295] Figures 1 to 9c This is a liquid applicator 100 of a first preferred embodiment of the present invention, which is axially coupled above a vertically positioned container 10. After the container 10 is filled with liquid L on the production line, the container opening 10a is first sealed with a sealing assembly 10b, and then the liquid applicator 100 is coupled (e.g., ...). Figure 5This liquid L can be used in applications such as cooking oil, olive oil, conditioning agents, seasonings, soy sauce, vinegar, wine, chili oil, baking agents, release agents, skin care agents, medical agents, cleaning agents, waxing agents, detergents, herbicides, lubricants, disinfectants, cosmetic dyes, cultivation agents, various biochemical agents, industrial agents, or other similar agents.

[0296] The liquid dispenser 100 includes: a grip portion 101 axially connected to the neck of the container 10 at its bottom; a circular cavity 104 radially concave from front to back in the grip portion 101; and a tubular dispensing portion 103 extending forward at an angle above the circular cavity 104. In the directional language used throughout this invention, such as... Figure 3 As shown, with the axial center line C of the container opening 10a as a reference, the direction upward is designated as "up" U, and the direction downward is designated as "down" D; and the direction towards the opening of the circular cavity 104 is designated as "front" F, and the direction away from the opening of the circular cavity 104 is designated as "back" B. These directional terms are used only to explain the present invention and are not intended to limit the present invention.

[0297] The circular cavity 104 is used to house a pump unit 110 and to define a buffer chamber R1 within it (e.g., Figure 3 and 5 Furthermore, the circular cavity 104 is provided with an outflow opening 105 that connects downward to the interior of the container 10. It should be noted that the outflow opening 105 is located above and in front of the container opening 10a. Therefore, when the liquid dispenser 100 is held by the user in a slightly horizontal, habitual posture, the outflow opening 105 will be positioned downwards, allowing the liquid L inside the container 10 to be smoothly released outwards through the outflow opening 105 (e.g., Figure 6b , 7c 8c and 9c).

[0298] The interior of the release part 103 is provided with a slope 13 that slopes backward and downward, and a nozzle 11 and an outlet 12 are protruding above the slope 13. The nozzle 11 and the outlet 12 each have a pumping channel 11a and an outlet channel 12a that connect downward to the circular cavity 104.

[0299] The buffer chamber R1 has a vent 107 that connects downward to the interior of the container 10, and a ramp through-hole 13a that connects upward to the release section 103. The ramp through-hole 13a can connect outward to the front opening 103a of the release section 103 through the space above the ramp 13. In this way, by utilizing the space of the buffer chamber R1, a ventilation path WA1 can be naturally formed, consisting of the ramp through-hole 13a, the buffer chamber R1, and the vent 107 connected in series. Figure 6b ).

[0300] It is noteworthy that the ramp 13 is designed to receive the residual liquid LD flowing from the nozzle 11 and the outlet 12. Therefore, a guide groove 13b is provided on its surface to connect with the ramp through-hole 13a. The guide groove 13b extends further downward to the rear side wall of the buffer chamber R1. In this way, the residual liquid LD flowing from the nozzle 11 and the outlet 12 can be attracted by the capillary action of the guide groove 13b, and then flow downward toward the ramp through-hole 13a, and then flow back into the container 10 through the ventilation path WA1 (e.g., Figure 6c ).

[0301] The front end of the dispensing part 103 is connected to a cap seat 16 equipped with a cap 14 to prevent the nozzle 11 and the outlet 12 from being contaminated. The cap seat 16 is detachably connected to the front opening 103a of the dispensing part 103 by snap-fit ​​or screw-fit, and its inner periphery is provided with an inner ring flange 15; the inner ring flange 15 can form an arc or ring-shaped connection for any residual liquid LD that may leak out by means of the cohesive force of the liquid, so as to prevent the residual liquid LD from leaking out.

[0302] It should be noted that the pump unit 110 has a cylindrical main body formed by a flow path section 111 and a rotary control section 112. The flow path section 111 is rotatably and fluid-tightly inserted into the circular cavity 104, and the rotary control section 112 protrudes from the outer end of the forward extension 104a of the circular cavity 104 to rotate the flow path section 111 back and forth between multiple flow path positions. The pump unit 110 has multiple paths for fluid flow corresponding to the multiple flow path positions, so that the liquid L in the container 10 can be dispensed and released in multiple modes through these paths.

[0303] It is worth noting that the buffer chamber R1 is located inside the circular cavity 104 and is naturally formed by defining a gap between the rear end of the flow path 111 and the inner end of the circular cavity 104, so it does not add any additional components or costs; other uses of the buffer chamber R1 will be described below.

[0304] The outer peripheral wall of the flow path 111 and the inner peripheral wall of the circular cavity 104 have multiple stepped narrowing or widening sections (not shown) to facilitate easy insertion of the flow path 111 into the circular cavity 104. In addition, multiple sealing components (not shown) are provided between the outer peripheral edge of the flow path 111 and the inner peripheral edge of the circular cavity 104 in accordance with conventional techniques to prevent liquid leakage.

[0305] Intentionally, the outer periphery of the flow path 111 is radially concave to form an arcuate channel 150 at a position corresponding to both the outlet opening 105 and the outlet channel 12a, with a default curvature; furthermore, the arcuate channel 150 is intentionally narrowed at one end to include a channel narrowing portion 151. Specifically, since the arcuate channel 150 and the channel narrowing portion 151 are concave at a preset curvature on the outer periphery of the flow path 111, by rotating the flow path 111 to the default curvature position, the arcuate channel 150 and the channel narrowing portion 151 can be fluidly coupled to the outlet opening 105 and the outlet channel 12a, thereby facilitating fluid communication between the interior of the container 10 and the outlet nozzle 12 (e.g., Figures 8a to 9c ).

[0306] The pump unit 110 includes a pumping system. The pumping system typically includes at least: a pumping inlet 121, a one-way inlet valve 131, a pump chamber P1, a one-way outlet valve 132, a first pumping outlet 128, and a second pumping outlet 129.

[0307] The pump chamber P1 is configured to generate a pumping action to pump out the liquid L in the container 10; therefore, any pump chamber capable of generating a pumping action can be installed in this invention.

[0308] Regarding the example configuration of pump chamber P1 in this case: as follows Figures 3 to 5 As shown, the interior of the pump unit 110 is divided into a front circular cavity 113 and a rear circular cavity 114 by a pump chamber side wall 116. The pump chamber P1 is located in the front circular cavity 113 and is defined by a piston 120 arranged in front of the pump chamber side wall 116.

[0309] However, the pump chamber P1 can also be replaced by an elastic bladder-type pump chamber P2 (e.g., Figure 12 and 13 ).

[0310] Different from Figure 50a The return spring 92 of the conventional sprayer 90 shown is located inside the pump chamber P. In this case, the return spring 149 of the piston 120 is specifically located on the periphery of the front circular cavity 113 to prevent the liquid in the pump chamber P1 from being contaminated by the return spring 149.

[0311] The piston 120 is pushed by its button 140 and returned to its original position by the bias of the return spring 149, allowing it to extend and retract in front of the pump chamber side wall 116. This generates a positive pressure and a negative pressure in the pump chamber P1, thereby promoting pumping. The button 140 of the piston 120 is normally extended outward at the front end of the rotary control part 112 by the forward bias of the return spring 149 and the positioning action of a pair of flanges (inner ring flange 145 and outer ring flange 146), so that the user can press backward to push the piston 120. Since the user presses the button 140 backward to push the piston 120, the flow path part 111 will remain inside the circular cavity 104 unless the user intentionally pulls the flow path part 111 forward for cleaning.

[0312] Both the piston 120 and the button 140 are molded from an elastic material. The button 140 includes a push rod 141 extending rearward to secure the piston 120, and an annular sealing assembly 142 shaped around the outer periphery of the push rod 141, away from the piston 120. The annular sealing assembly 142 is truncated conical in shape, allowing its outer periphery to slidably and elastically fit against the inner wall of the front cavity 113. When the piston 120 and the annular sealing assembly 142 are inserted into the front cavity 113, a movable annular flow channel 122 that moves with the piston 120 can be defined between the piston 120 and the annular sealing assembly 142 (e.g., a movable annular flow channel 122 that moves with the piston 120). Figure 3 and 4 ).

[0313] The push rod 141 has a cross-section that is... The pump inlet channel 123 is shaped such that its inlet end connects to the annular channel 122, while its outlet end can be connected to the pump chamber P1 via a one-way inlet valve 131. The one-way inlet valve 131 is typically a leaf spring valve integrated with the piston 120, thereby pre-closing the outlet end of the pump inlet channel 123. However, those skilled in the art can modify the one-way inlet valve 131 by using other similar valves that can operate in one direction (such as lip valves, cone valves, duckbill valves, or ball valves).

[0314] The one-way outlet valve 132 is liquid-tightly inserted into the rear circular cavity 114 via its annular base 134. The one-way outlet valve 132 is typically a resiliently expandable lip valve preloaded to the normally closed pump chamber outlet 126 of the pump chamber P1; however, those skilled in the art can modify the one-way outlet valve 132 by using other similar valves that can operate in one direction (such as leaf spring valves, cone valves, duckbill valves, or ball valves).

[0315] The pumping inlet 121 is radially opened inward beyond the arc-shaped channel 150 at the outer periphery of the flow path 111, and it can be connected to the pump chamber P1 through the annular flow channel 122, the pump inlet flow channel 123, and the one-way inlet valve 131; the first pumping outlet 128 (as shown in the image) Figure 7a and7b ) and the second pump outlet 129 (such as Figures 2 to 5 Each is radially inwardly opened on the outer periphery of the flow path section 111, and both are connected to the pump chamber P1 through the one-way outlet valve 132 and the pump chamber outlet 126.

[0316] It should be noted that in this example, the flow path 111 can be rotated back and forth in an addressable manner by the control unit 112 between a first flow path position, a second flow path position, a third flow path position, and a fourth flow path position; for this purpose, the liquid dispenser 100 also includes an addressing device for guiding and positioning the flow path 111 to the four flow path positions.

[0317] Please also refer to Figure 1 2 and 7b, the addressing device includes: a shape like An arrow-shaped pointer T is typically positioned on the outer periphery of the protrusion 104a of the circular cavity 104; four marks (M1, M2, M3, M4) are typically arranged on the outer periphery of the control section 112, each corresponding to one of the four flow path positions, with the pointer T as the reference; four positioning grooves 109b are typically arranged on the arc-shaped recess 109a of the protrusion 104a, each corresponding to one of the four flow path positions; and an elastic positioning member 115 is used to normally engage one of the positioning grooves 109b. It is preferably shaped as a leaf spring extending rearward from the outer periphery of the control section 112 so that it can extend into the arc-shaped recess 109a and engage the positioning groove 109b by means of the protrusion on the inner side of its end.

[0318] When the user rotates the control unit 112 to rotate the flow path unit 111 to the desired flow path position, the elastic positioning member 115 can elastically deform and slide across and engage with other positioning grooves 109b as it rotates with the control unit 112. Each time it slides across and engages, it will provide feedback by generating a vibration and making a "click" sound, so that the user can obtain clear positioning information.

[0319] For information on the use of this liquid applicator 100, please also refer to: Figure 1 , 5 In diagrams 6a and 6b, the flow path section 111 of the pump unit 110 is currently in the first flow path position. In this position, the diagram is as follows: The pumping outlet marker M1 is aligned with the indicator T. Correspondingly, the pumping inlet 121 and the second pumping outlet 129 of the pumping system are respectively fluid-coupled to the outlet opening 105 and the outlet channel 12a. Therefore, as Figure 6aAs shown, when the user removes the sealing assembly 10b of container 10 and holds the liquid dispenser 100 in a slightly horizontal, conventional posture, the liquid L in the container first flows through the outlet 105 and the arcuate channel 150 to the pump inlet 121; then, a small amount of seepage LS due to pressure difference drips from the vent 107, and this seepage LS can be temporarily stored in the space of the buffer chamber R1. For example... Figure 6b As shown, when the user presses and releases button 140 back and forth, causing piston 120 to extend and retract, pump chamber P1 will generate a positive pressure and a negative pressure. The positive and negative pressures will cause one-way outlet valve 132 and one-way inlet valve 131 to elastically deform and form a passage. This causes the outflow opening 105, arc-shaped channel 150, pumping inlet 121, annular flow channel 122, pumping inlet flow channel 123, one-way inlet valve 131, pump chamber P1, pump chamber outlet 126, one-way outlet valve 132, second pumping outlet 129, and outflow channel 12a to be connected in series to form a second pumping path WP1b. This allows the liquid L in container 10 to flow out through the second pumping path WP1b and finally flow out from outlet 12 in the mode of pumping outflow PF.

[0320] It is worth noting that since the amount of liquid pumped out from the pump chamber P1 each time is fixed (e.g., 2cc), the user can determine the desired amount of liquid L from the outlet 12 based on the number of pumps. If the user only needs a small amount of liquid, they only need to press the button 140 slightly to micro-control the pumping stroke of the piston 120, so that a satisfactory small amount of liquid L can flow out from the outlet 12.

[0321] Next, please refer to Figures 7a to 7c The flow path section 111 of the pump unit 110 is then rotated to the second flow path position by the rotation control section 112. In this position, the diagram is as follows: The pump ejection mark M2 is aligned with the virtual indicator VT (illustrated indicator). Correspondingly, the pump inlet 121 and the first pump outlet 128 of the pumping system can be fluidly coupled to the outlet opening 105 and the pump outlet channel 11a, respectively. Thus, when the user presses / releases the button 140 to cause the pump chamber P1 to produce a pumping action, the outflow opening 105, the arc-shaped channel 150, the pumping inlet 121, the annular flow channel 122, the pumping inlet flow channel 123, the one-way inlet valve 131, the pump chamber P1, the pump chamber outlet 126, the one-way outlet valve 132, the first pumping outlet 128, and the pumping outlet channel 11a are connected in series to form a first pumping path WP1a, so that the liquid L in the container 10 can flow outward through the first pumping path WP1a, and finally be atomized and released from the nozzle 11 in the mode of pumping out PS through the spray hole of the nozzle 11 by the pressurization of the internal pressurization valve and the acceleration and vortex of the vortex chamber (not shown).

[0322] It must be understood that, in this second flow path position, since the inlet end of the outflow channel 12a is sealed by the outer periphery of the flow path section 111, the liquid L will not accidentally flow out of the outflow channel 12a when the PS is pumped out.

[0323] Next, please refer to Figures 8a to 8c The flow path section 111 of the pump unit 110 is then rotated to the third flow path position by the rotation control section 112. In this position, the diagram is as follows: The small outflow indicator M3 is aligned with the schematic virtual indicator VT. Correspondingly, the outflow opening 105 can be fluidly coupled to the outflow channel 12a through the arcuate channel 150 and the channel narrowing section 151 in sequence. In this way, the liquid L in the container 10 can flow outward along the direction shown by the arrow through the small outflow path WSF1 formed by the outflow opening 105, the arcuate channel 150, the channel narrowing section 151, and the outflow channel 12a in series, and finally be released from the outlet 12 in the mode of small outflow SF. Since the width of the channel narrowing section 151 is reduced, the liquid L flows out stably in a controllable manner.

[0324] Next, please refer to Figures 9a to 9c The flow path section 111 of the pump unit 110 is now rotated to the fourth flow path position. In this position, the diagram is as follows: The large outflow indicator M4 is aligned with the virtual indicator VT. Correspondingly, the outflow opening 105 can be fluidly coupled to the outflow channel 12a through the arcuate channel 150. In this way, the liquid L in the container 10 can flow outward in the direction shown by the arrow through the large outflow path WMF1 formed by the series connection of the outflow opening 105, the arcuate channel 150, and the outflow channel 12a, and finally be rapidly released from the outlet 12 in the mode of large outflow MF.

[0325] At Figure 6b , 7c During the application process described in 8c and 9c, when the liquid is released outward and a vacuum phenomenon with negative pressure suction is generated in the container 10, the negative pressure suction can draw in outside air A from the front opening 103a of the release part 103, and then flow into the container through the ventilation path WA1 described above. At this time, if the liquid L in the container is large enough to flood the ventilation hole 107 in the reverse direction, the air A will pass through the ventilation hole 107 and mix into the liquid L to form bubbles LB. When the bubbles LB float to the surface of the liquid and burst, the volume of air released can eliminate the vacuum phenomenon in the container 10.

[0326] It is important to understand that when the user returns the container 10 to its upright position after use, the residual liquid LD flowing from the nozzle 11 or the outlet 12 and the exudate LS temporarily stored in the buffer chamber R1 can flow back into the container 10 through the ventilation path WA1. This prevents the residual liquid LD or the exudate LS from leaking out (e.g., Figure 6c ).

[0327] The above describes the structure and operation of the liquid applicator 100; however, based on the principles of this invention, various variations are still possible. For example, in... Figure 10a and 10b This shows a similar Figure 1 and Figure 5 The difference between the modified nozzle 21 and the outlet 22 is that the tube of the outlet 22 is enlarged, and the nozzle 21 is placed inside the outlet channel 22a of the outlet 22.

[0328] For example, in Figure 11a and 11b Another similar one is shown in the image. Figure 1 and Figure 5 The nozzle 24 of the variant example differs in that: the front end of the nozzle 24 has an axially recessed groove 25a, and a screwdriver-like rotator 25b can engage the groove 25a to rotate and control the nozzle 24, thereby adjusting the liquid flow gap or direction (not shown) of the vortex chamber inside the nozzle 24, thus changing the pattern of liquid L ejected from the nozzle 24, so that the liquid L in the container 10 can be selectively ejected from the nozzle 24 in a jet or atomized manner. The rotator 25b can be made into various decorative shapes (in this example, a shape similar to a round coin is used), and a recessed seat is molded at an ideal location on the liquid dispenser to detachably accommodate the rotator 25b. The construction of the vortex chamber inside the nozzle 27 is prior art and will not be described in detail here.

[0329] Figures 12 to 19b This invention shows a liquid applicator 200 according to a second preferred embodiment of the present invention, which is similar to the liquid applicator 100 of the first embodiment. The main difference is that in this example, the space of the buffer chamber R2 is used to configure a flow path opening and closing mechanism 260 for opening and closing the outflow opening 205. For this purpose, the buffer chamber R2 has a tapered hole 207 extending downward to the interior of the container 10, and a through hole 206 extending upward to the top of the grip portion 201. The through hole 206 extends forward to the ramp through hole 13a, and a gas guide groove 206a is recessed in its rear wall.

[0330] The flow path opening and closing mechanism 260 includes: a button 261 located on the top of the grip portion 201 and with a liquid seal cover through hole 206, the button 261 being typically a hollow hemispherical elastic capsule that can be elastically deformed; a push rod 262 that passes through the conical hole 207 and through hole 206 sequentially from bottom to top and is connected to the button 261, the bottom of the push rod 262 being co-constituted with a conical seat 263 having a cutout 269 and being in close contact with the peripheral wall of the conical hole 207; and an elastic arm 265 co-constituted with the conical seat 263, the end of the elastic arm 265 having an upwardly convex closing seat 267, the top surface of the closing seat 267 being in a pre-forced state and in close contact with the bottom end face of the outflow opening 205 by the elastic force of the elastic arm 265.

[0331] Since the outflow opening 205 is normally closed by the sealing seat 267, the circular cavity 204 in this example is provided with an inflow hole 209 that connects downward to the inside of the container 10.

[0332] This example of a pumping system includes at least: a first pump inlet channel 223 (e.g. Figure 13 and 16 ), a second pump inlet channel 224 (such as Figure 19a ), a one-way inlet valve 231, a pump chamber P2, a one-way outlet valve 232, and a first pump outlet 228 (e.g. Figure 13 , 14 , and 16), and a second pump outlet 229 (such as Figure 19a and 19b ).

[0333] The pump chamber P2 in this example is constructed by fluid-tightly connecting a hollow hemispherical elastic bladder 220 to the front end of the rotary control section 212. The inner peripheral wall of the elastic bladder 220 and the front end face of the rotary control section 212 together define the pump chamber P2. However, the pump chamber P2 can also be constructed using... Figure 5 The piston-type pump chamber P1 was replaced.

[0334] The one-way inlet valve 231 and one-way outlet valve 232 are integrally molded from an elastic material. Both have coaxial truncated conical valve bodies, and a pump chamber outlet 226 is provided between them. The upstream inlet of the pump chamber outlet 226 axially penetrates the truncated conical valve body of the one-way inlet valve 231, while the truncated end face of the one-way inlet valve 231 is exposed. The one-way outlet valve 232 can be elastically deformed and tightly inserted into a valve cavity 213 axially concave at the front end of the rotary control part 212. Since the diameter of the one-way inlet valve 231 is much larger than the diameter of the one-way outlet valve 232, the geometric bottom of the truncated cone of the one-way inlet valve 231 can be elastically deformed and tightly fitted to the front end face 213a of the rotary control part 212, so that the truncated end face of the one-way inlet valve 231 faces the pump chamber P2 (e.g., Figure 13 and 16 ).

[0335] The first pump inlet channel 223 and the second pump inlet channel 224 are each opened radially inward and axially forward at the outer periphery of the flow path 211. Since the outlet ends of both are exposed on the front end face 213a of the control section 212, both can be connected to the pump chamber P2 through the one-way inlet valve 231. The first pump outlet 228 and the second pump outlet 229 are both opened radially inward at the outer periphery of the flow path 211. The inlet ends of both are connected to the valve cavity 213, and can be connected to the pump chamber P2 through the one-way outlet valve 232 and the pump chamber outlet 226.

[0336] The following describes the use of the liquid applicator 200: Please refer to... Figures 12 to 14 At this time, the flow path section 211 of the pump unit 210 is in the first flow path position. In this position, the diagram is as follows: The pump ejection mark M2 and graphic are as follows: The large outflow indicator M4 is aligned with the indicator T, indicating that this flow path position can be used for both pumping and large outflow application modes; correspondingly, the first pump inlet channel 223 and the first pump outlet 228 can be fluidly coupled to the inlet hole 209 and the pump outlet channel 11a respectively, and the arc-shaped channel 250 can be fluidly coupled to the outlet opening 205 and the outlet channel 12a at the same time.

[0337] Therefore, as Figure 17a As shown, when the user presses and releases the elastic bladder 220 back and forth, the elastic bladder 220 causes the pump chamber P2 to generate a positive pressure and a negative pressure due to the alternating elastic collapse and elastic recovery, thereby promoting the pumping action. This causes the inlet hole 209, the first pump inlet channel 223, the one-way inlet valve 231, the pump chamber P2, the pump chamber outlet 226, the one-way outlet valve 232, the first pumping outlet 228, and the pumping channel 11a to be connected in series to form a first pumping path WP2a, so that the liquid L in the container 10 can flow out through the first pumping path WP2a, and finally be atomized and released from the nozzle 11 in the mode of pumping out PS. When liquid L is released, the negative pressure suction generated inside container 10 can draw outside air A from the front opening 203a of the release part 203, and then flow into the container through the ventilation path WA2 formed by the inclined through hole 13a, the air guide groove 206a, the buffer chamber R2, and the cut 269 in the direction shown by the arrow, so as to eliminate the vacuum phenomenon inside container 10.

[0338] For example Figure 17bAs shown, when the user presses button 261, the capsule of button 261 elastically collapses due to the pressure, thereby forcing push rod 262 and elastic arm 265 to move simultaneously toward the container. This causes conical seat 263 and sealing seat 267 to move away from conical hole 207 and outlet opening 205 simultaneously, allowing the liquid L in container 10 to flow outward along the direction indicated by the arrow through a large number of outflow paths WMF2 formed by the outlet opening 205, arc channel 250, and outlet channel 12a, and finally be released from outlet 12 in a large outflow MF pattern. When the force applied to button 261 is released, button 261 will return to its original position due to the elastic recovery of its capsule, pulling push rod 262 and elastic arm 265 back to their original positions, ultimately causing conical seat 263 and sealing seat 267 to close conical hole 207 and outlet opening 205 again.

[0339] Next, please refer to Figure 18a and 18b The flow path 211 in the diagram is now rotated to the second flow path position. In this position, the diagram is as follows: The small outflow indicator M3 is aligned with the virtual indicator VT. Correspondingly, the arcuate channel 250 is fluidly coupled to the outflow opening 205, and the channel narrowing section 251 is fluidly coupled to the outflow channel 12a. Thus, when the button 261 is pressed, causing the closure seat 267 to move away from the outflow opening 205, the liquid L in the container can flow outward along the direction indicated by the arrow through the small outflow path WSF2 formed by the outflow opening 205, the arcuate channel 250, the channel narrowing section 251, and the outflow channel 12a connected in series, and finally be released from the outlet 12 in the mode of a small outflow SF.

[0340] Next, please refer to Figure 19a and 19b In the diagram, flow path 211 is now rotated to the third flow path position. At this position, the diagram is as follows: The pumping outlet marker M1 is aligned with the virtual indicator VT. Correspondingly, the second pumping inlet channel 224 and the second pumping outlet 229 can be fluidly coupled to the inlet port 209 and the outlet channel 12a, respectively. Therefore, when the elastic bladder 220 is alternately pressed and released to cause the pumping chamber P2 to produce a pumping action, the liquid L in the container will flow outward along the direction indicated by the arrow through the second pumping path WP2b, which is formed by the inlet port 209, the second pumping inlet channel 224, the one-way inlet valve 231, the pumping chamber P2, the pumping chamber outlet 226, the one-way outlet valve 232, the second pumping outlet 229, and the outlet channel 12a. Finally, it will be quantitatively or meteredly released from the outlet 12 in the mode of pumping out PF.

[0341] Figures 20 to 25bThis invention shows a liquid dispenser 300 according to a third preferred embodiment of the present invention, which is similar to the liquid dispenser 100 of the first embodiment. The main difference is that the buffer chamber R3 in this example is used as a feed channel, allowing a feed chamber 380 to be provided above it. For this purpose, the buffer chamber R3 is provided with an upper through hole 306 that connects upward to the feed chamber 380 and a lower through hole 307 that connects downward to the interior of the container 10. In this way, the buffer chamber R3, the upper through hole 306, and the lower through hole 307 can be connected in series to form a feed path WL3 that allows the feed chamber 380 to connect downward to the interior of the container 10.

[0342] In addition, the flow path 311 of the pump unit 310 in this example extends rearward to a sealing member 360 for opening and closing the lower through hole 307. The sealing member 360 is provided with a pumping air guide hole 353 and an outflow air guide hole 354.

[0343] Better examples, such as Figure 23a As shown, the feeding chamber 380 is positioned above the grip portion 301 of the liquid dispenser 300 in a funnel-like manner, so that the user can easily fill the container 10 with filling liquid, concentrate, or preparation substance 389 through the top opening of the feeding chamber 380.

[0344] In a preferred embodiment, the supply chamber 380 and container 10 are combined to form a "mother-daughter container" set. The manufacturer can pre-store the preparation liquid in container 10 (mother container) and pre-store the preparation substance 389 (e.g., various concentrates, flavorings, baking agents, alcoholic beverages, nutritional supplements, vitamins, medical agents, skin care agents, disinfectants, alcohol, pigments, biochemical agents, or other similar agents) in the supply chamber 380 (daughter container). In another preferred embodiment, the manufacturer can pre-place a small container 381 containing the preparation substance 389 in the supply chamber 380 (e.g., ...). Figure 21 ), or pre-fill multiple small containers (382, 383, 384, 385) each containing various compounding substances 389 (e.g. Figure 22 Multiple of these small containers may be made of materials such as plastic bottles, glass bottles, plastic jars, glass jars, metal jars, capsules, composite bags, or other similar small containers.

[0345] For information on the use of this liquid applicator 300: please refer to... Figures 20 to 23b The flow path section 311 of the pump unit 310 is currently in the first flow path position. In this position, the diagram is as follows: With the feed mark M5 aligned with the indicator T, the buffer chamber R3 is now connected in series with the upper through-hole 306 and the lower through-hole 307 to form the feed path WL3. The arc-shaped channel 350 can simultaneously fluidly couple the outflow opening 305 and the outflow channel 12a. Thus, when the user removes the top cover 386, the preparation substance 389 contained in the small containers (381, or 382, ​​383, 384, and 385) can be poured down from the top opening of the feeding chamber 380 and then flow into the container 10 through the feed path WL3 to mix with the preparation liquid in the container 10 to form a preparation agent L2. A pre-installed stirring assembly can be placed inside the container 10 to promote the uniformity of the preparation agent L2 through the stirring action of the stirring assembly (figure omitted). During the feeding process, the positive pressure PP generated inside the container 10 due to the reduction of space can be discharged outward from the outlet 12 through the outlet opening 305, the arc-shaped channel 350, and the outlet channel 12a, so as to prevent the thrust of the positive pressure PP from hindering the inflow of the preparation material 389.

[0346] Next, please refer to Figure 24a and 24b The flow path 311 in the diagram is now rotated to the second flow path position. In this position, the diagram is as follows: The large outflow indicator M4 is aligned with the virtual indicator VT. Correspondingly, the arc-shaped channel 350, due to simultaneous fluid coupling with the outflow opening 305 and the outflow channel 12a, forms a large outflow path WMF3. Furthermore, the closure 360 ​​of the pump unit 310 at this time seals the lower through-hole 307, but a venting path WA3a for outflow can be formed in series via the ramp through-hole 13a, the feeding chamber 380, the upper through-hole 306, the buffer chamber R3, the venting port 354 for outflow, and the lower through-hole 307. Thus, when the user replaces the top cover 386 and adjusts the liquid dispenser 300 accordingly... Figure 9c When used in this manner, the dispensing agent L2 in container 10 will be as follows: Figure 24a As shown, the air flows outward along the direction of the arrow through the large outflow path WMF3, and is finally released from the outlet 12 in the mode of large outflow MF (figure omitted); during the release process, the air pressure difference between the inside of the container 10 and the outside can be balanced by the venting path WA3a for outflow.

[0347] Next, please refer to Figure 25a and 25b The flow path 311 in the diagram is now rotated to the third flow path position. In this position, the diagram is as follows: The pumping ejection mark M2 is aligned with the virtual indicator VT. Correspondingly, the outflow opening 305 can be fluidly coupled to the pumping channel 11a through the pumping inlet 321 and pumping outlet 328 of the pumping system, thus forming a pumping path WP3 connecting the interior of the container 10 and the nozzle 11. In addition, the closure 360 ​​of the pump unit 310 still covers the lower through hole 307 at this time, but a venting path WA3b for pumping can be formed by connecting the ramp through hole 13a, the feeding chamber 380, the upper through hole 306, the buffer chamber R3, the venting hole 353 for pumping, and the lower through hole 307 in series. Thus, when the liquid dispenser 300 according to Figure 7c When used in this manner, the dispensing agent L2 in container 10 will be as follows: Figure 25a As shown, the flow proceeds outward through the pumping path WP3 in the direction of the arrow, and is finally released from the nozzle 11 in a pumped ejection mode (figure omitted); during the release process, the air pressure difference between the inside of the container 10 and the outside can be balanced by the venting path WA3b for pumping.

[0348] Generally, liquid products that are pre-mixed at the factory undergo some degree of qualitative change in their components due to the physical changes or chemical reactions that occur during long-term storage, logistics, and sales. Therefore, this liquid dispenser 300, equipped with a "mother-daughter container" (feeding chamber 380 paired with container 10), is very suitable for products with high quality requirements. The feeding chamber 380 allows manufacturers to pre-store perishable preparation materials 389. Since consumers only need to pour the preparation material 389 into container 10 to prepare the preparation agent L2, it has the preservation effect of real-time preparation and use. By adopting this "mother-daughter container" separate packaging model, manufacturers can ensure the quality of the packaged product even after long-term storage, logistics, and sales, thereby extending the product's shelf life.

[0349] Figures 26 to 30b This invention shows a liquid dispenser 400 according to a fourth preferred embodiment, which is similar to the liquid dispensers (100 and 300) of the first and third embodiments. The main difference is that, in this example, when the flow path 411 of the pump unit 410 is in its initial first position, its closure 460 seals the upper through-hole 406 to allow the manufacturer to pre-store concentrate or preparation substance 489 in the feed chamber 480 above the upper through-hole 406; in addition, the top opening of the feed chamber 480 is permanently sealed by the top cover 486 in a non-removable manner by fastening or welding (e.g., Figure 27a To inform consumers that the upper through-hole 406 is closed at this first flow path position, a graphic is provided on the outer periphery of the rotary control part 412 as shown. The closing mark M6, which is aligned with the pointer T at the first flow path position (e.g., Figure 26 ).

[0350] Similar to the liquid applicator 300 in the third embodiment, the closure 460 in this example is provided with a pumping vent 453 and an outflow vent 454.

[0351] Regarding the use of the liquid applicator 400: (e.g.) Figure 28a and 28b As shown, first rotate the flow path section 411 to the second flow path position. In this position, the pattern is as follows. The feed mark M5 is aligned with the virtual indicator VT. Correspondingly, the closure 460 rotates away from the upper through-hole 406 as it follows the flow path 411. This causes the buffer chamber R4 to be connected in series with the upper through-hole 406 and the lower through-hole 407 to form a feed path WL4 connecting the feed chamber 380 and the container 10. Therefore, the concentrate or formulation 489 in the feed chamber 480 can flow downward into the container 10 through the feed path WL4 to be formulated into formulation L2.

[0352] Next, please refer to Figure 29a and 29b The flow path 411 in the diagram is now rotated to the third flow path position. In this position, the diagram is as follows: The large outflow marker M4 is aligned with the virtual indicator VT. Correspondingly, the arc-shaped channel 450 forms a large outflow path WMF4 because the fluid is simultaneously coupled to the outflow opening 405 and the outflow channel 12a. In addition, the closure 460 of the pump unit 410 seals the lower through-hole 407 at this time, but the lower through-hole 407 can be connected in series to form an outflow venting path WA4a by the outflow vent 454, the buffer chamber R4, the venting groove 436 axially opened on the outer periphery of the one-way outlet valve 432, the venting hole 458 radially opened on the outer periphery of the flow path 411, and the ramp through-hole 13a. In this way, when the liquid dispenser 400 according to Figure 9c When used in this manner, the dispensing agent L2 in container 10 will be as follows: Figure 29a As shown, the flow proceeds outward along the direction of the arrow through the large outflow path WMF4, and is finally released from the outlet 12 in a large outflow MF pattern (figure omitted); during the release process, the pressure difference between the inside of the container 10 and the outside can be balanced by the venting path WA4a for outflow.

[0353] Next, please refer to Figure 30a and 30b The flow path 411 in the diagram is now rotated to the fourth flow path position. In this position, the diagram is as follows: The pumping ejection mark M2 is aligned with the virtual indicator VT. Correspondingly, the outflow opening 405 can be fluidly coupled to the pumping channel 11a through the pumping inlet 421 and pumping outlet 428 of the pumping system, thus forming a pumping path WP4 connecting the interior of the container 10 and the nozzle 11. In addition, the closure 460 of the pump unit 410 still covers the lower through hole 407 at this time, but the lower through hole 407 can be connected in series to form a pumping ventilation path WA4b through the pumping vent 453, the buffer chamber R4, the venting groove 436 axially opened on the outer periphery of the one-way outlet valve 432, the venting hole 457 radially opened on the outer periphery of the flow path 411, and the ramp through hole 13a. In this way, when the liquid dispenser 400 according to Figure 7c When used in this manner, the dispensing agent L2 in container 10 will be as follows: Figure 30a As shown, the flow proceeds outward through the pumping path WP4 in the direction of the arrow, and is finally released from the nozzle 11 in a pumped ejection mode (figure omitted); during the release process, the pressure difference between the inside of the container 10 and the outside can be balanced by the venting path WA4b used for pumping.

[0354] Figures 31 to 35b The liquid applicator 500 of the fifth preferred embodiment of the present invention is similar to the liquid applicators (100 and 400) of the first and fourth embodiments, with the main difference being that the top cover 586 of the feeding chamber 580 in this example is removable, and the peripheral wall of the feeding chamber 580 is provided with a metering scale 581. After the user removes the top cover 586 of the feeding chamber 580, the concentrated agent or preparation substance 589 can be metered and stored in the feeding chamber 580 according to the accuracy of the metering scale 581.

[0355] In addition, such as Figure 32a As shown, the cap 28a attached to the front end of the release section 503 in this example is rotatable, and the outer periphery of the nozzle 27 is provided with a plurality of radially outwardly protruding lugs 27a. When the cap 28a rotates, the radially inwardly retracting rotating part of its inner periphery can drive the lugs 27a of the nozzle 27, thereby rotating the nozzle 27 back and forth between a first position and a second position, thereby switching the liquid flow gap or direction of the vortex chamber inside the nozzle 27, thereby changing the manner in which the liquid is released from the nozzle 27, so that the liquid in the container 10 can be selectively pumped out from the nozzle 27 in a metered manner (similar to...). Figure 6b (Operating mode) or sprayed in an atomized manner. The construction of the internal vortex chamber of the nozzle 27 is a well-known technique and will not be described in detail here.

[0356] Since the liquid in container 10 can be pumped out from nozzle 27 by rotating the cap seat 28a in a metering manner, the outlet of the above embodiments is omitted in this example.

[0357] The pumping system example in this case includes at least a pump chamber P5, a first pumping inlet 521a, a second pumping inlet 521b, a first pumping outlet 528, and a second pumping outlet 529. The pumping inlets and outlets (521a, 521b, 528, and 529) are each radially inwardly opened at the outer periphery of the flow path 511 to connect to the pump chamber P5. Figure 33b and 35a As shown, the first pumping inlet 521a and the second pumping inlet 521b are connected to the pump chamber P5 sequentially through the annular flow channel 522, the pumping inlet flow channel 523, and the one-way inlet valve 531; while the first pumping outlet 528 and the second pumping outlet 529 are connected to the pump chamber P5 sequentially through the one-way outlet valve 532 and the pump chamber outlet 526.

[0358] For information on the use of this liquid applicator 500: please refer to... Figure 31 and 32a In the diagram, the cover 28 has been removed and fastened to the top of the top cover 586 of the feeding chamber 580, and the flow path section 511 of the pump unit 510 is now in the first flow path position. In this position, the diagram is as follows: The closure mark M6 aligns with the indicator T, indicating that the closure member 560 of the flow path section 511 has closed the upper through hole 506, thus making the feeding chamber 580 a storage chamber for storing materials. Therefore, as Figure 33a As shown, after the user opens the top cover 586, the concentrated agent or preparation substance 589 can be poured into the feeding chamber 580 in appropriate amounts according to the accuracy of the measuring scale 581. In this way, the concentrated agent or preparation substance 589 can be metered and stored in the feeding chamber 580.

[0359] For example Figure 33b As shown, in this first position, the inlet hole 509a at the bottom of the circular cavity 504 can sequentially pass through the second pumping inlet 521b, the annular flow channel 522, the pumping flow channel 523, the one-way inlet valve 531, the pump chamber P5, the pump chamber outlet 526, the one-way outlet valve 532, and the second pumping outlet 529 to fluidly couple to the return hole 509b, thus forming a pumping return path WP5b with both ends connected to the interior of the container 10. Therefore, when the button 540 is accidentally pressed, the liquid L pumped out of the container 10 will flow back into the container 10 along the pumping return path WP5b, preventing liquid L from being accidentally sprayed from the nozzle 27.

[0360] Next, please refer to Figure 34a and 34b The flow path 511 in the diagram is now rotated to the second flow path position. In this position, the diagram is as follows: The feed mark M5 is aligned with the virtual indicator VT. Correspondingly, the closure 560 moves away from the upper through hole 506 as it rotates with the flow path 511. This causes the upper through hole 506, the buffer chamber R5, and the lower through hole 507 to be connected in series to form a feed path WL5 connecting the feed chamber 580 and the interior of the container 10. In addition, the vent 508 at the bottom of the circular cavity 504 can then flow outward through the arc-shaped channel 550 and be fluidly coupled to the ramp through hole 13a. This connects in series to form a positive pressure discharge path WPP connecting the interior of the container 10 and the opening of the cap seat 28a. Therefore, the concentrate or formulation substance 589 stored in the feeding chamber 580 can flow into the container 10 through the feeding path WL5 to be formulated into formulation L2. During the feeding process, the positive pressure PP generated inside the container due to the reduction of space can be discharged outward through the positive pressure discharge path WPP from the opening of the cap seat 28a to prevent the thrust of the positive pressure PP from hindering the flow of the concentrate or formulation substance 589.

[0361] Next, please refer to Figure 35a and 35b The flow path 511 in the diagram is now rotated to the third flow path position. In this position, the diagram is as follows: The pump ejection mark M2 is aligned with the virtual indicator VT. Correspondingly, the inlet hole 509a at the bottom of the circular cavity 504 can be fluidly coupled to the pump outlet channel 11a through the first pump inlet 521a and the first pump outlet 528, thus forming a pump release path WP5a in series. In addition, the closure 560 of the pump unit 510 at this time covers the lower through hole 507, but the lower through hole 507 can be sequentially connected with the air guide hole 553, the buffer chamber R5, the venting groove 536 carved on the outer periphery of the flow path 511, and the ramp through hole 13a to form a venting path WA5. In this way, when the liquid dispenser 500 follows the instructions... Figure 7c When used in this manner, the dispensing agent L2 in container 10 will be as follows: Figure 35a As shown, the liquid flows outward towards nozzle 27 along the arrow direction of the pumping path WP5a. The user can switch the liquid flow gap or direction of the vortex chamber inside nozzle 27 by rotating the cap seat 28a. For example, when nozzle 27 is rotated to the first position of the right limit, the formulation L2 can be atomized and released from nozzle 27 in a pumped spray PS mode; when nozzle 27 is rotated to the second position of the left limit, the formulation L2 can be pumped out from nozzle 27 in a metered pumped flow PF mode. During the release process, outside air A can enter container 10 through ventilation path WA5 to balance the air pressure difference between the inside of container 10 and the outside.

[0362] Figures 36 to 42The liquid applicator 600 shown in the sixth preferred embodiment of the present invention is similar to the liquid applicators (100 and 300) of the first and third embodiments. The main difference is that since the liquid applicator 600 in this example has a feeding chamber 680 with a filling function, it is permissible to connect a set of bidirectional liquid suction units 670 to the suction hole 609 at the bottom of the circular cavity 604, so that the liquid applicator 600 has the function of multi-directional liquid spraying.

[0363] The bidirectional liquid-drawing unit 670 has a three-way pipe body 675. The three-way pipe body 675 has a shared outlet 673, a forward inlet 671, and a reverse inlet 672 that allow fluid to communicate with each other. The shared outlet 673 faces upward and is fitted with an inlet connector 609a to connect to the inlet hole 609. The forward inlet 671 faces downward and is arranged sequentially downward with a ball valve 678, a suction tube 10c, and a filter screen (not shown). The reverse inlet 672 faces upward and is arranged sequentially upward with a ball valve 679 and a filter screen 676.

[0364] In this example, the circular cavity 604 extends further back through the gripping part 601, and a cylindrical rear extension 604a protrudes behind the gripping part 601; in addition, the circular cavity 604 is provided with an upper through hole 606 that connects upward to the feeding chamber 680, and a flow-out opening 605, a lower through hole 607, and a suction hole 609 that connect downward to the inside of the container 10.

[0365] In this example, the flow path 611 is inserted into the circular cavity 604 from back to front, and a protruding section 611a is exposed at the front end of the circular cavity 604.

[0366] In this example, the rotary control part 612 is co-located at the rear end of the flow path part 611, and its outer periphery can be combined with the outer periphery of the rear extension part 604a to form an ergonomic arc-shaped support, so that the user's palm can comfortably rely on the arc-shaped support to support the overall weight of the container 10.

[0367] Similar to the liquid applicator 100 in the first embodiment, the pump unit 610 in this example is internally divided into a front circular cavity 613 and a rear circular cavity 614 by a pump chamber sidewall 616. The pump chamber P6 is defined by a piston 620 positioned in front of the pump chamber sidewall 616 of the front circular cavity 613. During assembly, the piston rod 629 of the piston 620 is first passed sequentially through an annular base 648 and a return spring 649, and then combined with a push button 640 to pre-assemble a piston telescopic module 624; then, the annular base 648 of the piston telescopic module 624 is inserted into the annular retainer 618 of the front circular cavity 613, thus easily assembling the pump chamber P6. After assembly, the push button 640 of the piston 620, due to the bias pressure of the return spring 649, normally extends outward at the front end of the extension section 611a of the flow path 611 (e.g., ...). Figure 37a , 41a and 41b).

[0368] In this example, a trigger 660 actuates the piston 620. The trigger 660 has a pivot hole 661 pivotally mounted on a pivot 667 of a pivot seat 666 located above and in front of a circular cavity 604; the back of the trigger 660 has a rearwardly projecting push rod 664, which is configured to actuate a push button 640 to push the piston 620 toward the pump chamber sidewall 616 (e.g., ...). Figure 36 , 37a , and 37c).

[0369] In this example, the one-way inlet valve 631 is disposed on the back side of the pump chamber side wall 616 of the rear circular cavity 614. Therefore, the pump chamber side wall 616 has a rearwardly convex cylindrical valve seat 623 for housing the one-way inlet valve 631. The one-way inlet valve 631 is molded from an elastic material and has a cylindrical valve body and a cap-shaped annular base 634. During assembly, the annular base 634 is inserted into the gap between the valve seat 623 and the peripheral wall of the rear circular cavity 614, thus securing the one-way inlet valve 631 to the back side of the pump chamber side wall 616. After assembly, the one-way inlet valve 631 is inserted into the inner periphery of the valve seat 623. Because the tubular valve body of the one-way inlet valve 631 gradually thins forward and expands radially, it can elastically deform and tightly fit the inner periphery of the valve seat 623 (e.g., Figure 40c , 41a , and 41c).

[0370] In this example, the nozzle 11 has a one-way outlet valve installed inside using conventional techniques, so the one-way outlet valve of the pump unit 610 in this example is omitted.

[0371] In this example, the buffer chamber R6 is located in the rear circular cavity 614, defined between the one-way inlet valve 631 and a circular plug 638. The peripheral wall of the buffer chamber R6 has three pairs (six) of radially approximately symmetrical large through holes 652 (e.g., Figure 37a and 37b ), two outflow vents 654 (e.g.) Figure 39a and 39b ), and two air vents 653 for pumping out (e.g. Figure 40a and 40b ).

[0372] Similar to the liquid dispenser 100 of the first embodiment, the flow path section 611 in this example can be addressably rotated back and forth between a first flow path position, a second flow path position, and a third flow path position by the rotary control section 612. Please refer to Figures 36 to 37cIn this example, the pointer T of the addressing device is located on the outer periphery of the rear extension 604a of the circular cavity 604, while three markers (M2, M4, M5) are arranged on the outer periphery of the rotary control part 612, and three positioning grooves 619 are arranged on the outer periphery of the extension 611a of the flow path part 611. Furthermore, the elastic positioning member 615, in this example, extends rearward from the back of the trigger 660, so that its end can elastically engage with one of the three positioning grooves 619. Thus, when the flow path part 611 is rotated to another flow path position by the rotary control part 612, the positioning groove 619, rotating with the flow path part 611, pushes the elastic positioning member 615 upward, allowing the elastic positioning member 615 to slide across and engage with the next positioning groove 619.

[0373] For information on the use of this liquid applicator 600: please refer to... Figures 36 to 37c The flow path section 611 of the pump unit 610 is currently in the first flow path position. In this position, the diagram is as follows: The feed mark M5 is aligned with the indicator T. Correspondingly, the buffer chamber R6 can be connected in series with the upper through hole 606, the two large through holes 652, and the lower through hole 607 to form a feed path WL6 connecting the interior of the container 10 and the feeding chamber 680. Moreover, the arc-shaped channel 650 can simultaneously fluidly couple the outlet opening 605 and the outlet channel 12a. Thus, when the user removes the top cover 686 and pours the liquid L, concentrate, or preparation substance 689 from the top opening of the feeding chamber 680, it can be filled into the container 10 through the feed path WL6. During the filling process, the positive pressure PP generated inside the container 10 can be discharged outwards through the outlet opening 605, the arc-shaped channel 650, and the outlet channel 12a in sequence, and discharged from the outlet 12.

[0374] Next, please refer to Figures 39a to 39c The flow path 611 in the diagram is now rotated to the second flow path position. In this position, the diagram is as follows: The large outflow indicator M4 is aligned with the virtual indicator VT. Correspondingly, the outflow opening 605, the arc-shaped channel 650, and the outflow channel 12a are connected in series to form a large outflow path WMF6 connecting the interior of the container 10 and the outlet 12. In addition, the buffer chamber R6 can be connected in series with the ramp through-hole 13a, the upper through-hole 606, the two outflow vents 654, and the lower through-hole 607 to form an outflow venting path WA6a. Therefore, the liquid L in the container can be released from the outlet 12 in a large outflow MF mode through the large outflow path WMF6. During the release process, the pressure difference between the interior of the container 10 and the outside can be balanced by the outflow venting path WA6a.

[0375] Next, please refer to Figures 40a to 42 The flow path 611 in the diagram is now rotated to the third flow path position. In this position, the diagram is as follows: The pump ejection mark M2 is aligned with the virtual indicator VT, indicating that the liquid L in container 10 can be pumped out of PS at this position. Therefore, at... Figure 40c The image shows in detail the pump inlet 621 and pump outlet 628, which can be respectively fluidly coupled to the inlet port 609 and the outlet channel 11a; in addition, the annular base 634 of the one-way inlet valve 631 is shown to have a through hole 635 and a cut port 637, and the valve seat 623 is shown to have a valve seat inlet 627a and a valve seat outlet 627b. This design allows the inlet 609 to sequentially connect to the pump outlet channel 11a via the pump inlet 621, through-hole 635, valve seat inlet 627a, one-way inlet valve 631, pump chamber inlet / outlet 626, pump chamber P6, pump chamber inlet / outlet 626, valve seat outlet 627b, notch 637, and pump outlet 628, thus forming a pumping path WP6 in series. In other words, at this third flow path position, the inlet 609 can be fluidly connected to the pump outlet channel 11a via the pumping system, thus forming a pumping path WP6 connecting the interior of the container 10 and the nozzle 11. Furthermore... Figure 40a The diagram shows in detail that the two vent holes 653 on the periphery of the buffer chamber R6 can be fluidly coupled to the upper through hole 606 and the lower through hole 607 respectively, so that the buffer chamber R6 can be connected in series with the ramp through hole 13a, the upper through hole 606, the two vent holes 653 and the lower through hole 607 to form a venting path WA6b for pumping.

[0376] Therefore, as Figure 40a As shown, when the user holds the liquid applicator 600 in a vertical position and pulls and releases the trigger 660 back and forth, the pump chamber P6 will alternately generate a positive pressure and a negative pressure. When the pump chamber P6 generates a negative pressure, the ball valve 679 will be attracted by the suction of the negative pressure and tightly close the reverse suction inlet 672. Therefore, the liquid L in the container 10 will only be drawn upwards in the direction indicated by the arrow through the filter screen (not shown), the straw 10c, the ball valve 678, the forward suction inlet 671, and the shared outlet 673 and drawn upwards to the suction hole 609 by the negative pressure. It will then be pushed upwards through the pumping path WP6 by the positive pressure to the pumping outlet channel 11a, and finally pumped out of the nozzle 11 at a position between the upper front and the lower front.

[0377] For example Figure 42As shown, when the user sprays the nozzle 11 downwards, the negative pressure suction generated by the pump chamber P6 will attract the ball valve 678 and tightly seal the positive inlet 671. Therefore, the liquid L in the container 10 will only pass through the filter 676, ball valve 679, reverse inlet 672, and shared outlet 673 in sequence as shown by the arrow. It will be sucked into the inlet hole 609 by the negative pressure and further pushed into the pump outlet channel 11a by the positive pressure through the pumping path WP6. Finally, it will be pumped out of the nozzle 11 at a position between the front and lower and the rear and lower.

[0378] It is important to understand that when the liquid L in container 10 is depleted and needs to be replenished, the user can directly fill the container 10 from the supply chamber 680. Therefore, the installation of the bidirectional liquid pumping unit 670 will not interfere with the user's replenishment of liquid L.

[0379] Figures 43 to 49b The liquid dispenser 700 of the seventh preferred embodiment of the present invention is similar to the liquid dispenser 100 of the first embodiment, with the main difference being that the dispensing section 703 in this example is composed of a metering chamber 703a and a dispensing seat 703b. The liquid L in the container 10 can be pumped to the metering chamber 703a for metering by the pumping system of the pump unit 710, and then released from the dispensing seat 703b, so that the liquid dispenser 700 has the function of metering and dispensing.

[0380] The metering chamber 703a is located above the circular cavity 704, and it has a metering inlet 783 that connects downward to the circular cavity 704, a vertical pump outlet pipe 785, and an inflow opening 787.

[0381] The release seat 703b detachably covers the top opening of the metering chamber 703a, thus having a circular cover-shaped body formed by an annular cover seat 36 and a circular plate-shaped ramp 33.

[0382] The annular cover 36 can liquid-tightly engage with the outer ring flange 37 above the metering chamber 703a. A pair of directional components 38, resembling ribs or grooves, are provided between the annular cover 36 and the outer ring flange 37, allowing the release seat 703b to be directionally repositioned after disassembly via the addressing action of the directional components 38. Furthermore, the bottom of the annular cover 36 has an annular seal 39, which can elastically deform and liquid-tightly adhere to the inner peripheral wall above the metering chamber 703a to prevent liquid leakage from the metering chamber 703a.

[0383] Similar to the liquid applicator 100 in the first embodiment, the nozzle 31 and the outlet 32 ​​in this example both protrude above the slope 33, and a cap 34 is provided above the release seat 703b to prevent contamination of the nozzle 31 and the outlet 32. An arc-shaped inner ring flange 35 is provided at the front upper part of the slope 33. The inner ring flange 35 can form an arc-shaped connection with the residual liquid in the nozzle 31 or outlet 32 ​​that may leak out by means of the cohesive force of the liquid, so as to prevent the residual liquid from leaking out.

[0384] The pumping channel 31a of the nozzle 31 is connected downward to the pumping pipe 785 of the metering chamber 703a, while the outflow channel 32a of the outlet 32 ​​is connected downward to the interior of the metering chamber 703a.

[0385] The ramp 33 has a ramp through hole 33a at its lower end, which connects to the metering chamber 703a. The metering chamber 703a also has a vent pipe 706 that connects to the buffer chamber R7. The buffer chamber R7 has a vent hole 707 that connects to the inside of the container 10. Thus, the buffer chamber R7 can be connected in series with the ramp through hole 33a, the vent pipe 706, and the vent hole 707 to form a ventilation path WA7.

[0386] The ramp 33 has a guide channel 33b on its top surface that connects to the ramp through hole 33a. The guide channel 33b extends upward to the bottom of the nozzle 31. Through the capillary action of the guide channel 33b, the residual liquid in the nozzle 31 and the outlet 32 ​​can be attracted and guided to the ramp through hole 33a, and then flow downward into the metering chamber 703a for temporary storage.

[0387] The pumping system example in this case includes at least: a pump chamber P7, a first pumping inlet 721a, a second pumping inlet 721b, a first pumping outlet 728, and a second pumping outlet 729. These inlets and outlets (721a, 721b, 728, and 729) are each radially inwardly opened at the outer periphery of the flow path 711 to communicate with the pump chamber P7.

[0388] like Figure 44 , 46 As shown in Figures 4 and 47, the pump unit 710 in this example has a rear circular cavity 714. A piston 720 is disposed at the front of the rear circular cavity 714, and a valve assembly 760 is disposed at the rear opening. The pump chamber P7 is located in the rear circular cavity 714 and is defined between the piston 720 and the valve assembly 760. During assembly, the piston rod 741 of the piston 720 is first passed forward through the through hole 716 at the front of the rear circular cavity 714, and then a button 740 containing a return spring 749 is inserted to pre-assemble a piston telescopic module 724 by means of the main body of the pump unit 710; then, the valve assembly 760 is inserted into the rear opening of the rear circular cavity 714, thus easily completing the assembly of the pump unit 710.

[0389] The valve assembly 760 comprises a plug-shaped base 764 and a composite valve 730. The plug-shaped base 764 is fluid-tightly inserted into the rear opening of the rear circular cavity 714, and has a forward-convex conical outlet valve seat 762 and a tubular inlet valve seat 761. The composite valve 730 is molded from an elastic material, and its main body has a pump chamber outlet 726. It also has a forward-convex tubular one-way inlet valve 731 and a rearward-convex tubular one-way outlet valve 732. The composite valve 730 is attached to the front of the plug-shaped base 764. Because the one-way inlet valve 731 gradually thins forward and expands radially, it can elastically deform and fit snugly against the inner periphery of the inlet valve seat 761. Similarly, because the one-way outlet valve 732 gradually thins rearward and narrows radially, it can elastically deform and fit snugly against the outer periphery of the outlet valve seat 762.

[0390] In this example, a suction tube 10c is installed downwards from the inlet 709 at the bottom of the circular cavity 704. The pumping system of the pump unit 710 can use the suction tube 10c to pump the liquid L in the container upwards. However, the inlet 709 can also be configured as follows: Figure 37a The bidirectional liquid pumping unit 670 of the liquid applicator 600 shown enables the liquid applicator 700 in this example to pump and spray liquid in all positions from upright to inverted.

[0391] The following explains the use of the liquid applicator 700: (e.g.) Figures 43 to 45 As shown, the flow path section 711 of the pump unit 710 is currently in the first flow path position, and the diagram at this position is as follows. The large outflow indicator M4 is aligned with the indicator T. Correspondingly, the arc-shaped channel 750 can simultaneously fluidly couple the outflow opening 705 and the inflow opening 787, thus making the outflow opening 705, the arc-shaped channel 750, the inflow opening 787, the metering chamber 703a, and the outflow channel 32a connected in series to form a large outflow path WMF7. Therefore, when the user flips the liquid dispenser 700 downwards to a slightly horizontal, habitually held position (figure not shown), the liquid L in the container 10 will flow as follows: Figure 44 The liquid flows outward along the large outflow path WMF7 as shown in the diagram, and is finally released from the outlet 32 ​​in a large outflow MF pattern. It is worth noting that since the liquid L in the container flows out through the metering chamber 703a, the impact force of the liquid L flowing outward in the container can be greatly reduced by the buffering and pressure reduction of the metering chamber 703a, so that the liquid L can be released slowly from the outlet 32 ​​in a controlled manner.

[0392] Next, please refer to Figures 48a to 48c The flow path 711 in the diagram is now rotated to the second flow path position. In this position, the graphic is as follows: The pump ejection indicator M2 is aligned with the virtual indicator VT, signifying that the liquid L in container 10 can be pumped out of PS at this position. Therefore, at... Figure 48c The diagram details how the first pumping inlet 721a and the first pumping outlet 728 can be fluidly coupled to the inlet port 709 and the outlet pipe 785, respectively. Furthermore, the inlet valve seat 761 is shown to have a first valve seat through-hole 761a, and the plug-shaped base 764 is shown to have a first base through-hole 764a. This design allows the inlet port 709 to be fluidly coupled to the outlet pipe 785 via the first pumping inlet 721a, the first valve seat through-hole 761a, the one-way inlet valve 731, the pump chamber P7, the pump chamber outlet 726, the one-way outlet valve 732, the first base through-hole 764a, and the first pumping outlet 728, thus forming a first pumping path WP7a in series.

[0393] Therefore, as Figure 48a As shown, when the user presses and releases button 740 repeatedly, the positive pressure thrust and negative pressure suction generated by the pump chamber P7 cause the one-way outlet valve 732 and the one-way inlet valve 731 to elastically deform, forming a passage. This facilitates the operation of the first pumping path WP7a, allowing the liquid L in container 10 to flow along the first pumping path WP7a in the direction indicated by the arrow to the pumping outlet channel 31a, and then be pumped out of nozzle 31. Next, please refer to... Figures 49a to 49c The flow path 711 in the diagram is now rotated to the third flow path position. In this position, the diagram is as follows: The pump metering mark M7 is aligned with the virtual indicator VT, which indicates that the liquid L in container 10 can be pumped and metered PC at this position. Therefore, at... Figure 49c The diagram details how the second pumping inlet 721b and the second pumping outlet 729 can be fluidly coupled to the inlet port 709 and the metering inlet 783, respectively. Furthermore, the inlet valve seat 761 is shown to have a second valve seat through-hole 761b, and the plug-shaped base 764 is shown to have a second base through-hole 764b. This design allows the inlet port 709 to be fluidly coupled to the metering inlet 783 via the second pumping inlet 721b, the second valve seat through-hole 761b, the one-way inlet valve 731, the pump chamber P7, the pump chamber outlet 726, the one-way outlet valve 732, the second base through-hole 764b, and the second pumping outlet 729, thus forming a second pumping path WP7b in series.

[0394] Therefore, as Figure 49aAs shown, when the user presses and releases button 740 repeatedly to activate the second pumping path WP7b, the liquid L in container 10 will flow into metering chamber 703a along the second pumping path WP7b in the direction indicated by the arrow, thus performing the pumping and metering operation of PC. During the metering process, the user can use the metering scale 781 on the perimeter wall of metering chamber 703a (e.g., ...) Figure 43 The user visually estimates the required liquid volume. After measurement, the user flips the liquid dispenser 700 downwards to a slightly horizontal, habitual position and holds it, so that the liquid measured in the measuring chamber 703a can be released from the outlet 32 ​​through the outlet channel 32a (figure not shown).

[0395] Reversibly, if the user wishes to reduce the measured volume after completing measurement in metering chamber 703a, they only need to rotate the flow path section 711 back to the first flow path position (e.g., Figure 44 In this way, the liquid measured in the measuring chamber 703a can be flowed down through the inflow opening 787, the arc-shaped channel 750, and the outflow opening 705 to flow back into the container in appropriate amounts, so as to meet the user's precise measurement needs.

[0396] At Figure 44 , 48a During the liquid release process shown in 49a, outside air A can flow into container 10 through ventilation path WA7 to balance the air pressure difference between the inside of container 10 and the outside.

[0397] In summary, the liquid applicator of the present invention is not only novel but also highly advanced. The rotary pump unit (110, 210, 310, 410, 510, 610, 710) allows for easy alteration of the fluid flow path between the inside and outside of the container 10. Furthermore, the buffer chamber formed by the pump unit can not only create a ventilation path but also serve as a feed path, allowing for the placement of a multi-purpose feed chamber (380, 480, 580, 680) above it.

[0398] From a commercial perspective, the liquid dispenser of the present invention solves many problems of conventional dispensers, and some embodiments of the liquid dispenser (100, 200, 300, 400, 500) allow the container opening 10a of the attached container 10 to be sealed to ensure the quality of the liquid L inside the container 10 and prevent leakage of the liquid L; therefore, the liquid dispenser of the present invention will become a niche product for manufacturers. Furthermore, since these pump units (110, 210, 310, 410, 510, 610, 710) all adopt a modular design, they are suitable for manufacturers to mass-produce at low cost for widespread adoption.

[0399] The above examples illustrate several preferred embodiments of the present invention in conjunction with the accompanying drawings. Those skilled in the art can make various changes, modifications, or equivalent applications based on the principles and teachings of the present invention. However, all such changes, modifications, or applications are within the scope defined by the patent application scope for which the present invention seeks protection.

Claims

1. A liquid applicator, characterized in that, The bottom is attached to a container, which contains: A circular cavity with an outflow opening that connects downwards to the interior of a container; A discharging section is provided with an outlet and a nozzle, each having an outlet channel and a pumping channel that connect downward to a circular cavity; and A pump unit having a rotary control section, a flow path section, an arc-shaped channel located on the outer periphery of the flow path section and containing a channel narrowing section, and a pumping system, the pumping system including at least a pump chamber, a pumping inlet, a first pumping outlet, and a second pumping outlet. The flow path portion is inserted inside a circular cavity and can be rotated back and forth by a control portion between multiple default flow path positions. In a first flow path position, the outflow opening is fluidly coupled to the outflow channel through a pump inlet and a second pump outlet; in a second flow path position, the outflow opening is fluidly coupled to the pump outlet channel through a pump inlet and a first pump outlet; in a third flow path position, the outflow opening is fluidly coupled to the outflow channel through an arc-shaped channel and a channel narrowing portion; and in a fourth flow path position, the outflow opening is fluidly coupled to the outflow channel through an arc-shaped channel.

2. The liquid applicator according to claim 1, characterized in that, The pumping inlet, the first pumping outlet, and the second pumping outlet are each opened radially inward from the outer periphery of the flow path. The pumping inlet is connected to the pump chamber through a one-way inlet valve, while the first pumping outlet and the second pumping outlet are connected to the pump chamber through a one-way outlet valve.

3. The liquid applicator according to claim 1, characterized in that, The pump chamber is located inside a front circular cavity containing a pump chamber sidewall and is defined between the pump chamber sidewall and a piston. The piston button is normally extended outward at the front end of the rotary control unit due to the bias of a return spring.

4. The liquid applicator according to claim 1, characterized in that, An elastic bladder is attached to the front end of the rotary control unit, and the pump chamber is defined between the inner peripheral wall of the elastic bladder and the front end face of the rotary control unit.

5. The liquid applicator according to claim 1, characterized in that, A buffer chamber is defined between the rear end of the flow path section and the inner end of the circular cavity. The buffer chamber is provided with a vent hole that connects downward to the inside of the container and a ramp through hole that connects upward to the front opening of the release section. The vent hole, the buffer chamber, and the ramp through hole are connected in series to form a ventilation path.

6. The liquid applicator according to claim 5, characterized in that, The residual liquid flowing from the nozzle and outlet flows back into the container through the ventilation path.

7. The liquid applicator according to claim 1, characterized in that, It also includes an addressing device for guiding and positioning the flow path section to the four flow path positions, the addressing device comprising: four positioning grooves each corresponding to the four flow path positions; and an elastic positioning member that normally engages with one of the four positioning grooves.

8. A liquid applicator, characterized in that, The bottom is attached to a container, which contains: A circular cavity, which has an outflow opening and an inflow hole that connect downward to the interior of the container; A discharge section is provided with an outlet and a nozzle, each of the outlet and the nozzle having an outlet channel and a pumping channel that connect downward to a circular cavity; A first-class flow opening and closing mechanism, used to open and close outflow openings; and A pump unit having a rotary control section, a flow path section, an arc-shaped channel located on the outer periphery of the flow path section and containing a channel narrowing section, and a pumping system, the pumping system including at least a pump chamber, a first pump inlet channel, a second pump inlet channel, a first pump outlet, and a second pump outlet. The flow path is inserted inside a circular cavity and can be rotated back and forth by a control unit between multiple default flow path positions. In one flow path position, the inlet hole is fluidly coupled to the pump outlet channel through a first pump inlet channel and a first pump outlet, and the outlet opening is fluidly coupled to the outlet channel through an arc-shaped channel. In another flow path position, the outlet opening is fluidly coupled to the outlet channel through an arc-shaped channel and a channel narrowing section. In yet another flow path position, the inlet hole is fluidly coupled to the outlet channel through a second pump inlet channel and a second pump outlet.

9. The liquid applicator according to claim 8, characterized in that, The first pump inlet channel, the second pump inlet channel, the first pump outlet, and the second pump outlet are all opened radially inward from the outer periphery of the flow path section. The first pump inlet channel and the second pump inlet channel are connected to the pump chamber through a one-way inlet valve, and the first pump outlet and the second pump outlet are connected to the pump chamber through a one-way outlet valve.

10. The liquid applicator according to claim 8, characterized in that, A buffer chamber is defined between the rear end of the flow path and the inner end of the circular cavity. The buffer chamber has a conical hole that communicates downward with the interior of the container and a through hole that penetrates upward through the top of the grip of the liquid dispenser. In addition, the flow path opening and closing mechanism includes: a resiliently returnable button; a push rod that passes through the conical hole and the through hole and is engaged with the button; and a resilient arm co-constructed at the bottom of the push rod. The end of the resilient arm has a sealing seat that normally fits tightly against the bottom of the outflow opening. When the button is pressed, the sealing seat can be moved away from the outflow opening.

11. A liquid applicator, characterized in that, A feeding chamber is located above the gripping part, and a container is attached to the bottom, comprising: A circular cavity with an outflow opening that connects downwards to the interior of a container; A discharge section is provided with an outlet and a nozzle, each of the outlet and the nozzle having an outlet channel and a pumping channel that connect downward to a circular cavity; A buffer chamber, which connects the feeding chamber and the container; and A pump unit has a rotary control section, a flow path section, an arc-shaped channel located on the outer periphery of the flow path section, and a pumping system, the pumping system including at least a pumping inlet, a pumping outlet, and a pump chamber. The flow path section is inserted inside the circular cavity and can be rotated back and forth between multiple default flow path positions by the control section to switch between various fluid paths connecting the inside of the container to the outside.

12. The liquid applicator according to claim 11, characterized in that... The pump inlet and pump outlet are each radially inwardly opened on the outer periphery of the flow path to connect to the pump chamber.

13. The liquid applicator according to claim 11, characterized in that, The circular cavity is radially concave in the gripping part, and the buffer chamber is defined between the rear end of the flow path and the inner end of the circular cavity. The buffer chamber has a lower through hole that connects downward to the inside of the container and an upper through hole that connects upward to the feeding chamber. When the flow path is rotated to a preset flow path position, the lower through hole, the buffer chamber, and the upper through hole are connected in series to form an inlet path that allows the inside of the container to connect to the feeding chamber. When the flow path is rotated to another flow path position, the outlet opening, the arc-shaped channel, and the outlet channel are connected in series to form an outlet path that allows the inside of the container to connect to the outlet nozzle. When the flow path is rotated to yet another flow path position, the outlet opening, the pump inlet, the pump chamber, the pump outlet, and the pumping channel are connected in series to form a pumping path that allows the inside of the container to connect to the nozzle.

14. The liquid applicator according to claim 11, characterized in that, The circular cavity radially penetrates the gripping part and is further provided with an upper through hole connecting upward to the feeding chamber, and a lower through hole and a suction hole respectively connecting downward to the inside of the container; in addition, the interior of the pump unit is divided into a front circular cavity and a rear circular cavity by a pump chamber side wall; the buffer chamber is located in the rear circular cavity and is defined between the pump chamber side wall and a circular plug; the pump chamber is located in the front circular cavity and is defined between the pump chamber side wall and a piston; the piston push button is biased by a return spring and normally extends outward in front of the flow path part, and the push button can be actuated by a trigger to move the piston toward the pump chamber side wall.

15. The liquid applicator according to claim 14, characterized in that, The buffer chamber has a pair of radially symmetrical large through holes. When the flow path is rotated to one of the preset flow path positions, the lower through hole, one of the large through holes, the buffer chamber, the other large through hole, and the upper through hole are connected in series to form an inlet path that allows the inside of the container to connect to the feeding chamber. When the flow path is rotated to another flow path position, the outlet opening, the arc-shaped channel, and the outlet channel are connected in series to form an outlet path that allows the inside of the container to connect to the outlet nozzle. When the flow path is rotated to yet another flow path position, the suction hole, the pump inlet, the pump chamber, the pump outlet, and the pumping channel are connected in series to form a pumping path that allows the inside of the container to connect to the nozzle.

16. The liquid applicator according to claim 14, characterized in that, It also includes a set of bidirectional liquid-drawing units, wherein the bidirectional liquid-drawing units have a shared outlet, a forward liquid-drawing inlet, and a reverse liquid-drawing inlet that are interconnected by fluid; wherein the shared outlet is connected upward to the liquid-drawing hole, the forward liquid-drawing inlet is sequentially provided with a ball valve, a suction tube, and a filter screen downward, and the reverse liquid-drawing inlet is sequentially provided with a ball valve and a filter screen upward.

17. A liquid applicator, characterized in that, It has a feeding chamber at the top and a container at the bottom. Include: A circular cavity having an inlet hole, a return hole, and an exhaust hole that connect downwards to the interior of a container; A release part is provided with a nozzle and a sloping through-hole that connects downward to a circular cavity, the nozzle having a pumping channel that connects downward to the circular cavity; A pump unit comprising a rotary control section, a flow path section inserted into a circular cavity, an arc-shaped channel and a vent groove respectively disposed on the outer periphery of the flow path section, a closure member disposed at the rear end of the flow path section and containing a vent hole, and a pumping system, the pumping system comprising at least a pump chamber, a first pumping inlet, a second pumping inlet, a first pumping outlet, and a second pumping outlet; and A buffer chamber is defined between the rear end of the flow path section and the inner end of the circular cavity. The buffer chamber is provided with an upper through hole that connects upward to the feeding chamber and a lower through hole that connects downward to the inside of the container. The flow path section is inserted inside a circular cavity and can be rotated back and forth between multiple default flow path positions by the control section to form various fluid paths.

18. The liquid applicator according to claim 17, characterized in that, The first pumping inlet and the second pumping inlet are each opened radially inward from the outer periphery of the flow path, and both are connected to the pump chamber through a one-way inlet valve; the first pumping outlet and the second pumping outlet are also opened radially inward from the outer periphery of the flow path, and both are connected to the pump chamber through a one-way outlet valve.

19. The liquid applicator according to claim 17, characterized in that, When the flow path is rotated to a preset flow path position, the sealing member closes the upper through-hole to form a meterable storage chamber for the feeding chamber. Furthermore, the inlet hole can be fluidly coupled to the return hole via the second pumping inlet and the second pumping outlet to form a pumping return path. When the flow path is rotated to another flow path position, the sealing member moves away from the upper and lower through-holes, causing the upper through-hole, buffer chamber, and lower through-hole to be connected in series to form a feeding path. Furthermore, the vent hole can be fluidly coupled to the ramp through-hole via an arc-shaped channel to form a positive pressure discharge path. When the flow path is rotated to yet another flow path position, the inlet hole can be fluidly coupled to the pumping outlet via the first pumping inlet and the first pumping outlet to form a pumping release path. Furthermore, the sealing member closes the lower through-hole, but the lower through-hole can be fluidly coupled to the ramp through-hole via the vent, buffer chamber, and venting groove to form a venting path.

20. A liquid applicator, characterized in that, The bottom is attached to a container, which contains: A circular cavity, which has an outflow opening and an inflow hole that connect downward to the interior of the container; A release section includes a metering chamber and a release seat; the metering chamber has a metering inlet, a pump outlet pipe, an inflow opening, and a vent pipe, each communicating downwards with a circular cavity; the release seat has an outlet nozzle and a spray nozzle, the outlet nozzle having an outlet channel communicating downwards with the metering chamber, and the spray nozzle having a pump outlet channel communicating downwards with the pump outlet pipe; and A pump unit has a rotary control section, a flow path section, an arc-shaped channel located on the outer periphery of the flow path section, and a pumping system, the pumping system including at least a pump chamber, a first pumping inlet, a second pumping inlet, a first pumping outlet, and a second pumping outlet. The flow path section is inserted inside a circular cavity and can be rotated back and forth by a control section between multiple default flow path positions. In one flow path position, the arc-shaped channel is simultaneously fluid-coupled to the outflow opening and the inflow opening; in another flow path position, the first pumping inlet and the first pumping outlet are respectively fluid-coupled to the suction hole and the pumping outlet pipe; in yet another flow path position, the second pumping inlet and the second pumping outlet are respectively fluid-coupled to the suction hole and the metering inlet.

21. The liquid applicator according to claim 20, characterized in that, The first pumping inlet, the second pumping inlet, the first pumping outlet, and the second pumping outlet are each radially inwardly opened from the outer periphery of the flow path to connect to the pump chamber; in addition, a buffer chamber is defined between the rear end of the flow path and the inner end of the circular cavity, and the buffer chamber is provided with a vent hole that connects downward to the inside of the container. The vent pipe, the buffer chamber, and the vent hole are connected in series to form a venting path.

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