Liquid applicator

Abstract

A liquid dispenser, with a container attached to its bottom, includes: an electric pump chamber with a nozzle protruding outward from its front wall; a circular chamber with an inlet hole communicating with the interior of the container, and a first through hole and a second through hole communicating with the electric pump chamber; an electric pump unit inserted into the electric pump chamber, having an electric pump chamber; and a manual pump unit partially inserted into the circular chamber, having a manual pump chamber; by operating the manual pump unit, the inlet hole, the first through hole, the electric pump chamber, and the nozzle can be connected in series to form an electric pumping path; and the inlet hole, the manual pump chamber, the second through hole, and the nozzle can be connected in series to form a manual pumping path.

Description

Technical Field

[0001] The basis for the domestic priority claim of this invention is Taiwan Patent Application No. 113145700 (application date: November 27, 2024), which serves as the basis for the priority claim of this invention, and is hereby stated in advance.

[0002] This invention relates to a liquid dispenser used in conjunction with a container, and more particularly to a liquid dispenser that can pump and spray liquid from a container in an electric or manual mode. Prior Technology

[0003] Traditional sprayers that use containers are generally divided into two types: manual and electric. Although both can spray the liquid in the container, they have common problems in use. For example, when using a manual sprayer to spray nutrient solutions for outdoor gardening, the larger volume requires frequent triggering or button pressing, which can cause strain on the user's fingers. Similarly, when using an electric sprayer to spray nutrient solutions for indoor potted plants, the smaller size of indoor potted plants necessitates consideration of surrounding surfaces, floors, and interior decorations, preventing the large amount of nutrient solution sprayed instantly from the electric sprayer from splashing onto undesirable areas.

[0004] Furthermore, when traditional electric or manual sprayers are used to spray viscous liquids (such as conditioning agents, baking agents, mold release agents, detergents, cleaning agents, waxes, lubricants, and other similar agents), the nozzle will pick up the residue of the viscous liquid, which will then flow down to the grip area and seriously contaminate the user's palm. This makes traditional electric or manual sprayers unsuitable for spraying viscous liquids, thus greatly reducing their uses and causing manufacturers to lose a great deal of business opportunities.

[0005] One common issue is that since electric sprayers operate on battery power, if the battery runs out of power during spraying, the work will be interrupted.

[0006] On a fundamental issue, the traditional electric sprayer is constructed by separately installing and positioning the internal components into two housings, and then joining the two housings together as a single product through heat fusion, fastening, or screwing. Therefore, this construction has the following drawbacks:

[0007] Traditional electric sprayers require manual assembly of the pump, battery, push-button switch, motor, and circuit board into two separate housings. Furthermore, manual connection of fluid tubing to the suction pipe outlet, pump inlet and outlet, and nozzle inlet is essential. Additionally, multiple wiring connections between the battery, push-button switch, motor, and circuit board must be manually laid, and these wiring connections must be made manually using soldering, plugging, or screwing. Clearly, traditional electric sprayers not only require significant manpower for complex assembly, but their finished products also lack reliable quality assurance.

[0008] In addition, because traditional electric sprayers require space inside the casing for manual assembly of internal components, the finished product becomes excessively bulky.

[0009] In addition, if the two housings of a traditional electric sprayer are detachably joined by snap-fit ​​or screw-fit, external liquids or moisture will seep in through the gap between the two housings and damage the circuit board; if they are fused together without detachment, it will cause trouble for maintenance and battery replacement. Summary of the Invention

[0010] To address the aforementioned problems, the present invention aims to provide a liquid applicator that combines an electric pumping device and a manual pumping unit, allowing users to choose between electric or manual modes for liquid spraying. Furthermore, the components of the electric pumping device are automatically assembled in a plug-in manner, thus solving the problems caused by manual assembly in traditional electric sprayers.

[0011] The liquid dispenser has a container attached to its bottom, comprising: an electric pump chamber with its bottom wall forming an electric pump cavity; a nozzle protruding outward from the front wall of the electric pump cavity; a circular cavity having an inlet hole communicating downward to the interior of the container, and a first through hole and a second through hole communicating upward to the electric pump cavity; an electric pumping device installed in the electric pump chamber, having an electric pump unit having an electric pump chamber inserted into the electric pump cavity; and a manual pump unit having a manual pump chamber and a flow path portion inserted into the circular cavity. By operating the manual pump unit, the inlet hole, the first through hole, the electric pump chamber, and the nozzle can be connected in series to form an electric pumping path; and the inlet hole, the manual pump chamber, the second through hole, and the nozzle can be connected in series to form a manual pumping path.

[0012] In one embodiment, the manual pump unit has a rotary control section, by which liquid in the container can be selectively sprayed out through an electric pumping path or a manual pumping path.

[0013] In another embodiment, the manual pump unit has a button that, by pressing the button, causes liquid in the container to be selectively sprayed out through either an electric pumping path or a manual pumping path.

[0014] In another embodiment, the manual pump unit has a rotary control with a button for rotating the flow path between a first flow path position and a second flow path position. Furthermore, an outlet nozzle is added outward from the front wall of the electric pump cavity, and an arc-shaped channel is added to the outer periphery of the flow path. The circular cavity also has a lower through-hole connecting to the interior of the container and an upper through-hole connecting to the electric pump cavity. The lower through-hole, arc-shaped channel, upper through-hole, and outlet nozzle are connected in series to form a flow path. In the first flow path position, pressing the button allows the liquid in the container to be selectively sprayed out through either the electric or manual pump path. In the second flow path position, the liquid in the container flows out through the outlet nozzle via the flow path. Notably, the electric pump cavity defines a temporary storage space for storing residual liquid from the nozzle and outlet nozzle, thus preventing residual liquid from flowing down to the grip area and contaminating the user's hand.

[0015] It is worth noting that the rear opening of the electric pump chamber is equipped with a removable sealing cover to prevent the intrusion of external liquids or moisture. This allows the electric pumping device located in the electric pump chamber to not only obtain safe and reliable moisture protection, but also to perform related maintenance by removing the sealing cover.

[0016] Further objectives, effects, and advantages of the present invention will be described in detail below with reference to preferred embodiments of the invention and accompanying drawings. Simple Explanation of the Diagram

[0017] [Figure 1] is a perspective view of the first preferred embodiment of the liquid applicator of the present invention, wherein the manual pump unit is located in the first flow path position. [Figure 2a] is a three-dimensional view of the manual pump unit in Figure 1. [Figure 2b] shows the rear configuration of the manual pump unit of Figure 2a by rotating it. [Figure 3a] is an exploded perspective view of the electric pump unit in Figure 1. [Figure 3b] shows the rear configuration of the electric pump unit of Figure 3a by rotating it. [Figure 4] is a cross-sectional view of the liquid applicator in Figure 1. [Figure 5] is a detailed view of the circled area in Figure 4, enlarged. [Figure 6] is an exploded cross-sectional view of the liquid applicator in Figure 4. [Figure 7] is a schematic diagram of the operation of the liquid applicator in Figure 4, which is performing electric spraying operation. [Figure 8] is an enlarged detailed diagram of the operation of the circled part in Figure 7. [Figure 9] is a schematic diagram showing the operation of the manual pump unit in Figure 4 rotated to the second flow path position, in which manual spraying operation is being carried out. [Figure 10] is an enlarged version of the circled portion of Figure 9, showing the detailed operation. [Figure 11a] is a diagram of the electric pumping path of the manual pump unit in Figure 7 at the first flow path position. [Figure 11b] is a diagram of the manual pumping path of the manual pump unit in Figure 9 at the second flow path position. [Figure 12] is a perspective view of the second preferred embodiment of the liquid applicator of the present invention. [Figure 13] is a cross-sectional view of the liquid applicator in Figure 12. [Figure 14] is a detailed view of the circled part of Figure 13, enlarged. [Figure 15] is a schematic diagram of the operation of the liquid applicator in Figure 13 performing manual spraying. [Figure 16] is an enlarged detailed diagram of the operation of the circled part in Figure 15. [Figure 17] is a schematic diagram of the operation of the liquid applicator in Figure 13 performing electric spraying. [Figure 18a] is a manual pumping path diagram of the manual pump unit in Figure 15. [Figure 18b] is a diagram of the electric pumping path of the manual pump unit in Figure 17. [Figure 19a] shows the rear configuration of the manual pump unit of Figure 18a after it has been rotated. [Figure 19b] shows the manual pump unit of Figure 19a rotated further to reveal its rear configuration. [Figure 20a] is a variant of the liquid applicator in Figure 12, which has a trigger at the front. [Fig. 20b] is a cross-sectional view of the liquid applicator in Fig. 20a. [Figure 21] is a perspective view of the third preferred embodiment of the liquid applicator of the present invention, wherein the manual pump unit is located in the first flow path position. [Figure 22] is a cross-sectional view of the liquid applicator in Figure 21. [Figure 23] is a detailed view of the circled part of Figure 22, enlarged. [Figure 24] is a partial cross-sectional view of Figure 22, showing in detail the connection and configuration of the release section and the electric pump cavity. [Figure 25] is along the path of Figure 24. [SS] A schematic diagram obtained from the line of sight to show in detail the configuration of the release section. [Figure 26] is a schematic diagram of the operation of the liquid applicator in Figure 22 performing manual spraying. [Figure 27] is an enlarged detailed diagram of the operation of the circled part in Figure 26. [Figure 28] is a schematic diagram of the operation of the liquid applicator in Figure 22 performing electric spraying. [Figure 29] is a schematic diagram showing the manual pump unit of Figure 22 rotated to the second flow path position. [Figure 30] is a schematic diagram of the use of Figure 29, showing the liquid system flowing out from the outlet through the arc-shaped channel. [Figure 31a] is a diagram of the manual pumping and electric pumping paths of the manual pump unit in Figures 26 and 28 at the first flow path position. [Figure 31b] is a flow path diagram of the manual pump unit in Figure 30 at the second flow path position. [Figure 32] is a schematic diagram showing the flow of residual liquid from the nozzle and outlet into the temporary storage space. [Figure 33] is a perspective view of the fourth preferred embodiment of the liquid applicator of the present invention. [Figure 34] is a cross-sectional view of the liquid applicator in Figure 33. [Figure 35] is a three-dimensional view of the manual pump unit in Figure 34. Implementation

[0018] Figures 1 to 11b show a liquid dispenser 100 according to a first preferred embodiment of the present invention, which has a grip portion 101a axially connected to a container 190, and an ergonomically designed arc-shaped support portion 101b is provided behind the grip portion 101a; when the user grips the grip portion 101a, the web of the user's hand can comfortably rest against the support portion 101b to support the overall weight of the liquid dispenser 100 and the container 190.

[0019] The liquid dispenser 100 includes: a circular cavity 104 radially concave from the front to the rear of the grip portion 101a, which is used to house a set of manual pump units 110; and an electric pump chamber R10 integrally constructed above the circular cavity 104, which is used to house an electric pumping device. The rear opening of the electric pump chamber R10 is equipped with a removable sealing cover 179 containing a sealing element (not shown), so that the electric pumping device installed in the electric pump chamber R10 can not only obtain safe and reliable moisture protection, but also can be maintained by removing the sealing cover 179.

[0020] In the entirety of this invention, the directional terms used are as follows, with the axial center line C of the container opening 191 as a reference: the direction upward is referred to as "up" (U), the direction downward is referred to as "down" (D); and the direction towards the opening of the circular cavity 104 is referred to as "front" (F), and the direction away from the opening of the circular cavity 104 is referred to as "back" (B). These directional terms are used only to explain the invention and are not intended to limit the invention.

[0021] The electric pump chamber R10 includes: an electric pump cavity R11 co-constructed upward from the bottom wall of the electric pump chamber R10; a battery cavity R12 co-constructed upward from the top wall of the electric pump cavity R11; and a rear space R13, which is defined between the rear end openings of the electric pump cavity R11 and the battery cavity R12 and the sealing cover 179.

[0022] The front wall 102 of the electric pump cavity R11 is provided with a pump nozzle 102b and a manifold 102a. The pump nozzle 102b protrudes forward from the front wall 102 for a nozzle 181 to be inserted and connected; the manifold 102a protrudes backward from the front wall 102, but can pass forward through the pump nozzle 102b to connect to the nozzle 181.

[0023] The circular cavity 104 is provided with a first through hole 109a and a second through hole 109b that connect upwards to the electric pump cavity R11 (or electric pump chamber R10), and an upper air inlet 107a; and is provided with a suction hole 106, a return hole 108, and a lower air inlet 107b that connect downwards to the interior of the container 190. The suction hole 106 is connected downwards to a straw 193 to facilitate the upward suction of liquid L1 from the container 190.

[0024] The electric pumping device includes: an electric pump unit 150 inserted into the electric pump cavity R11, a rechargeable battery 180 inserted into the battery cavity R12, and a circuit board 170.

[0025] The electric pump unit 150 includes: a pump sleeve 151 detachably inserted into a pump cavity R11; an electric pump 161 containing an electric pump chamber P1 and inserted into a cavity behind the pump sleeve 151; and a motor 160 inserted into a cavity behind the electric pump 161. The pump sleeve 151, electric pump 161, and motor 160 are designed to be inserted into the pump cavity R11 using an automatic insertion machine. Furthermore, a plurality of sealing elements (not shown) are provided between the peripheral walls of the pump sleeve 151, electric pump 161, and motor 160 using conventional techniques to prevent liquid leakage.

[0026] Preferably, the circuit board 170 is detachably screwed or snapped onto the inner side wall of the sealing cover 179. The circuit board 170 is equipped with at least: an electronic control unit that controllably receives power from the battery 180 to supply power to the motor 160; a micro switch 171 for turning the electronic control unit on and off; four flexible electrical contacts 177, each with a flexible electrical contact; a charging interface with a waterproof cover that passes through the side wall of the sealing cover 179; and a plurality of indicator lights 178 for displaying the operating status of the electronic control unit and the power status of the battery 180. Since the circuit board 170 is attached to the inner side wall of the sealing cover 179, when the sealing cover 179 is closed behind the opening of the electric pump chamber R10, the elastic contacts of the four elastic electrical connectors 177 are elastically pressed against the two power output contacts 175 of the battery 180 and the two power input contacts 176 of the motor 160 to form an elastic electrical connection, so as to ensure that the power of the battery 180 can flow to the electronic control unit and then stably supply power to the motor 160 from the electronic control unit.

[0027] As shown in Figures 4 to 6, the front wall of the pump sleeve 151 has a forward-protruding connecting portion 159. The front end of the connecting portion 159 is concave to form a pumping manifold 156 for connecting the manifold 102a, and the rear end is concave to form a circular pump socket 154a containing a conical valve seat 154b. The pumping manifold 156 has a rearwardly extending electric pumping outlet 155a for connecting to the pump socket 154a, and a manual pumping outlet 155b for connecting to the interior of the pump sleeve 151. In addition, the pump sleeve 151 has a first inlet 152a and a second inlet 152b respectively communicating with the first through hole 109a and the second through hole 109b on its bottom wall, and has wall grooves 153 interconnected on the inner surface of its bottom wall and front wall, with the two ends of the wall grooves 153 respectively connected to the second inlet 152b and the manual pumping outlet 155b.

[0028] The pump components of the electric pump 161 (such as a rotating centrifugal component, a telescopic piston component, or a telescopic diaphragm component) can be driven by the rotation of the motor 160 to generate an electric pumping action in the electric pump chamber P1. The electric pump 161 has a housing molded from an elastic material, with a pump chamber inlet 165a on its bottom wall that connects downward to the first inlet 152a, and a pump plug 162 protruding from its front wall that contains a pump chamber outlet 165b and a one-way outlet valve 167. The one-way outlet valve 167 can be a valve that can be opened and closed in one direction, such as a lip valve, leaf spring valve, cone valve, duckbill valve, or ball valve. In this example, the one-way outlet valve 167 is integrally molded in the form of a truncated cone valve at the front end of the pump plug 162. When the pump plug 162 is inserted into the pump socket 154a, the inner periphery of the cone valve body of the one-way outlet valve 167 can fit tightly against the outer periphery of the valve seat 154b. When the electric pump chamber P1 generates an electric pumping action to pump liquid out of the pump chamber outlet 165b, the one-way outlet valve 167 will undergo elastic deformation due to the compression of the pumped liquid, so that a passage for liquid to be pumped out is formed between it and the valve seat 154b. In this way, the first through hole 109a can pass upward through the first inlet 152a, the pump chamber inlet 165a, the electric pump chamber P1, the pump chamber outlet 165b, the one-way outlet valve 167, the electric pumping outlet 155a, and the pumping manifold 156 to connect to the nozzle 181 (as shown in Figures 7 and 8).

[0029] The manual pump unit 110 has a cylindrical body formed by a flow path section 111 and a rotary control section 112. The flow path section 111 is inserted into the circular cavity 104; the rotary control section 112 protrudes from the front end of the circular cavity 104 so that the user can pinch it with their fingers to rotate the flow path section 111 back and forth between a first flow path position and a second flow path position, thereby switching between the manual or electric pumping path as described below.

[0030] The flow path 111 has an electric suction groove 119 drilled on its outer periphery. The electric suction groove 119 is formed by connecting an inlet groove 119a, an arc-shaped guide groove 119b, and an outlet groove 119c (as shown in Figures 2a and 2b).

[0031] The flow path 111 has a plurality of stepped narrowing or widening sections (not shown) between its outer peripheral wall and the inner peripheral wall of the circular cavity 104, making the flow path 111 suitable for insertion into the circular cavity 104 using an automatic insertion machine; in addition, a plurality of sealing elements (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 technology to prevent liquid leakage.

[0032] The manual pump unit 110 also has a manual pump chamber P2 for generating a pumping action to pump and eject the liquid in the container 190; therefore, any manual pump chamber capable of generating a pumping action can be installed in this invention.

[0033] Regarding the exemplary configuration of the manual pump chamber P2: As shown in Figures 4 to 6, the main body of the manual pump unit 110 contains a cylindrical cylinder 113. A piston 141 capable of axial extension and retraction is positioned in front of the cylinder 113, and a composite valve seat 120, which is connected to a composite valve 130 in front, is inserted behind it. The manual pump chamber P2 is defined between the piston 141 and the composite valve 130. The piston 141, via its piston rod 142, passes forward through a spring bearing 144 and a return spring 149, and is then fixed behind a button 140, thus becoming integrated with the button 140. Due to the pressing and pushing of the button 140 and the biased return of the return spring 149, the piston 141 can extend and retract within the manual pump chamber P2, generating both positive and negative pressures, thereby facilitating manual pumping.

[0034] The button 140 is returned to its original position 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), and normally extends outward at the front end of the rotary control part 112 to facilitate the user to press backward to move the piston 141. It should be understood that since the user presses the button 140 backward to move the piston 141, the flow passage part 111 will normally be located inside the circular cavity 104 unless the user deliberately pulls the flow passage part 111 forward for cleaning.

[0035] The composite valve seat 120 is liquid-tightly inserted behind the cylindrical cylinder 113, and has a forward-convex cylindrical inlet valve seat 121 and a conical outlet valve seat 122. The composite valve 130 is molded from an elastic material and has a pump chamber outlet 136, a forward-convex tubular one-way inlet valve 131, and a backward-convex tubular one-way outlet valve 132. When the composite valve 130 is inserted in front of the composite valve seat 120, since the one-way inlet valve 131 is progressively thinner and radially wider, it can elastically deform and fit tightly against the inner periphery of the inlet valve seat 121; and since the one-way outlet valve 132 is progressively thinner and radially narrower, it can elastically deform and fit tightly against the outer periphery of the outlet valve seat 122. In detail, the composite valve seat 120 has a first valve seat inlet 125a, a second valve seat inlet 125b, a first valve seat outlet 126a, and a second valve seat outlet 126b respectively, radially inward from its outer periphery; wherein, the first valve seat inlet 125a and the second valve seat inlet 125b are connected to the manual pump chamber P2 through a one-way inlet valve 131, and the first valve seat outlet 126a and the second valve seat outlet 126b are connected to the manual pump chamber P2 through a one-way outlet valve 132.

[0036] The manual pump unit 110 also has a first pump inlet hole 114a, a second pump inlet hole 114b, a first pump outlet hole 115a, and a second pump outlet hole 115b and a pump outlet groove 116 that are radially drilled inward from the outer periphery of the flow path section 111, respectively; wherein, the first pump inlet hole 114a and the second pump inlet hole 114b are connected to the manual pump chamber P2 through a one-way inlet valve 131, and the first pump outlet hole 115a and the second pump outlet hole 115b are connected to the manual pump chamber P2 through a one-way outlet valve 132.

[0037] It should be noted that in the illustrations of Figures 9, 10, and 11b, the flow path 111 is rotated to the second flow path position by the rotary control unit 112. In this position, the second pump inlet 114b and the pump outlet groove 116 are respectively fluid-coupled to the suction inlet 106 and the second through hole 109b. When the button 140 is pressed and released, and a pumping action is generated in the manual pump chamber P2, the positive pressure thrust and negative pressure suction of the pumping action can alternately open and close the one-way outlet valve 132 and the one-way inlet valve 131, thus enabling the suction inlet 106 to sequentially open and close. The second pump inlet 114b, valve seat second inlet 125b, one-way inlet valve 131, manual pump chamber P2, pump chamber outlet 136, one-way outlet valve 132, valve seat second outlet 126b, second pump outlet 115b, and pump outlet groove 116 are connected to the second through hole 109b, and further upwards through the second inlet 152b, wall groove 153, manual pumping outlet 155b, and pumping manifold 156 to connect to the nozzle 181, thereby forming a manual pumping path W21.

[0038] The side wall of the circular cavity 104 is provided with an electrically controlled through hole 104b that connects rearward to the space R13 behind the electric pump chamber R10, and a protruding tube 104c that extends rearward and surrounds the electrically controlled through hole 104b. The electrically controlled through hole 104b is used to allow an actuating rod 173 to slide through it. The actuating rod 173 has an elastic sealing sleeve 174 that seals the protruding tube 104c. By means of the elasticity of the elastic sealing sleeve 174, the rear end of the actuating rod 173 can elastically extend and retract to press the micro switch 171 at the front end (as shown in Figures 4 to 7).

[0039] It should be noted that in the illustrations of Figures 4 to 8 and Figure 11a, the flow path 111 is in the first flow path position. In this flow path position, the electric suction groove 119 on the outer periphery of the flow path 111 can simultaneously fluidly couple with the suction inlet 106 and the first through hole 109a (the suction inlet groove 119a and the suction outlet groove 119c of the electric suction groove 119 are respectively fluidly coupled with the suction inlet 106 and the first through hole 109a). In addition, the flow path 111 is provided with an axial through hole 118 aligned with the actuating rod 173 (as shown in Figure 5), and the button 140 has a push rod 143 at its rear end that can pass through the axial through hole 118. Thus, when the button 140 is pressed backward to the second position, it can cause the push rod 143 to push the actuating rod 173 backward, thereby actuating the micro switch 171, so as to achieve the desired effect through the micro switch. Switch 171 is used to activate the electronic control unit, which in turn transmits power from battery 180 to motor 160 to drive electric pump 161, so that electric pump chamber P1 of electric pump 161 generates electric pumping action. Through electric pumping action, one-way outlet valve 167 is forced to open, thereby causing the inlet hole 106 to sequentially pass through the inlet groove 119a, arc-shaped guide groove 119b, and outlet groove 119c of electric suction groove 119 to connect to the first through hole 109a, and further upward through the first inlet 152a, pump chamber inlet 165a, electric pump chamber P1, pump chamber outlet 165b, one-way outlet valve 167, electric pumping outlet 155a, and pumping manifold 156 to connect to the nozzle 181, thereby forming an electric pumping path W11.

[0040] In order to allow users to identify the two flow path locations of the flow path section 111, a shape resembling a "" is provided on the outer periphery of the forward extension 104a of the circular cavity 104. "The arrow-shaped indicator T, and the outer periphery of the rotary control part 112 is provided with two marks; one of the marks is shaped like..." The electric ejection mark Ma is aligned with the index T when the flow path 111 is in the first flow path position; the other mark is the manual ejection mark Mb, which is aligned with the index T when the flow path 111 is in the second flow path position.

[0041] To eliminate the vacuum phenomenon inside the container 190 caused by the release of liquid L1, the liquid dispenser 100 also includes a venting path W41, which is composed of a front wall through hole 103, an axial air inlet groove 157a, an arc-shaped air inlet groove 157b, an upper air inlet 107a, an arc-shaped air guide groove 117, and a lower air inlet 107b connected in series. The front wall through hole 103 is formed in the front wall 102 of the electric pump cavity R11; the axial air inlet groove 157a and the arc-shaped air inlet groove 157b are interlocked and carved on the outer periphery of the pump sleeve 151 (as shown in Figures 3a and 3b); the upper air inlet 107a and the lower air inlet 107b are respectively formed in the top and bottom walls of the circular cavity 104; and the arc-shaped air guide groove 117 is carved on the outer periphery of the flow path 111 (as shown in Figures 2a and 2b). Thus, when a vacuum phenomenon with negative pressure suction is generated inside the container, the suction force of the negative pressure will first draw the air inlet valve 195, which is normally closed at the lower air inlet 107b, inward, so that the air inlet valve 195 is away from the lower air inlet 107b; then, the suction force of the negative pressure will draw in outside air A through the front wall through hole 103, and then flow into the container 190 through the ventilation path W41, thereby eliminating the vacuum phenomenon inside the container (as shown in Figures 7 to 10).

[0042] Regarding the operation of the liquid applicator 100: Please refer to Figures 4 to 8 and Figure 11a. In the figures, the flow path section 111 of the manual pump unit 110 is in the first flow path position. In this flow path position, it is shaped like... The electric ejection mark Ma is aligned with the virtual indicator VT (a schematic indicator). Correspondingly, the push rod 143 of button 140 is aligned with the trigger rod 173. Furthermore, the suction groove 119a and suction groove 119c on the outer periphery of the flow path 111 are respectively fluid-coupled to the suction hole 106 and the first through hole 109a, thus allowing the suction tube 193 to pass upwards through the suction hole 106 and connect to the electric pumping path W11 described above. In addition, the first pump inlet hole 114a and the first pump outlet hole 115a on the outer periphery of the flow path 111 are respectively fluid-coupled to the suction hole 106 and the first through hole 109a. The inlet hole 106 and the return hole 108 are connected in series, such that the inlet hole 106 can be connected to the return hole 108 through the first pump inlet hole 114a, the first valve seat inlet 125a, the one-way inlet valve 131, the manual pump chamber P2, the pump chamber outlet 136, the one-way outlet valve 132, the first valve seat outlet 126a, and the first pump outlet hole 115a, thus forming a liquid return path W61. Therefore, when the user presses the button 140 backward to activate the micro switch 171 and start the electronic control unit, the electronic control unit can supply power to the motor 160 to drive the electric pump. Pump 161 is used to generate an electric pumping action in the electric pump chamber P1. Through this electric pumping action, liquid L1 in container 190 is drawn upwards along the suction tube 193, and then flows through the electric pumping path W11 to nozzle 181. Liquid L1 is pressurized by the pressure-boosting valve inside nozzle 181 and accelerated and swirled by the vortex chamber (figure omitted), finally atomized and sprayed out from the nozzle orifice. Simultaneously, because button 140 is pressed backwards by the user, piston 141 is pushed backwards, causing liquid in manual pump chamber P2 to be squeezed towards pump chamber outlet 136. Then it flows back into the container 190 along the liquid return path W61. It should be understood that when the flow path 111 is in the first flow path position, the manual pump chamber P2 is not connected to the nozzle 181. Therefore, when the button 140 is pressed backward, the liquid in the manual pump chamber P2 cannot be ejected from the nozzle 181 to relieve pressure, which will cause resistance to pressing the button 140 backward. Through the backflow and pressure relief effect of the liquid return path W61, the button 140 can be pressed backward smoothly and without obstruction, so that the liquid in the container 190 can be ejected from the nozzle 181 by the electric pumping action.

[0043] Preferably, the electronic control unit further includes a self-holding circuit designed with conventional technology. This self-holding circuit is used to automatically take over the starting circuit of the electronic control unit from the micro switch 171. Therefore, when the user presses the button 140 backward to cause the liquid L1 in the container 190 to be electrically pumped out from the nozzle 181, the user can immediately release the finger pressing the button 140, and hand over the power to the self-holding circuit to automatically take over the starting circuit of the electronic control unit from the micro switch 171. This allows the user to perform an easy and pleasant electric pumping spraying operation without having to continuously press the button 140. When the spraying operation is completed, the user only needs to press the button 140 again to activate the micro switch 171 to disconnect the operation of the self-holding circuit, thereby stopping the electric pumping spraying operation.

[0044] Next, please refer to Figures 9, 10, and 11b. The flow path 111 shown in the figures is now rotated to the second flow path position by the control unit 112. In this position, the manual ejection mark Mb, shaped like ">", is aligned with the virtual indicator VT. Correspondingly, the push rod 143 of the button 140 has moved away from the trigger rod 173 (no longer shown in the figure), and the second pump inlet 114b and the pump outlet groove 116 on the outer periphery of the flow path 111 are respectively fluidly coupled to the suction inlet 106 and the second through hole 109b, so that the suction tube 193 can be connected to the manual pumping path W21 described above through the suction inlet 106. Therefore, when the user presses and releases button 140 back and forth, the piston 141 can be moved to extend and retract, thereby generating a manual pumping action in the manual pump chamber P2. Through the manual pumping action, the liquid L1 in the container 190 can be sucked up along the straw 193 to the inlet 106, and then flowed to the nozzle 181 through the manual pumping path W21 and sprayed out.

[0045] As described above, since the liquid applicator 100 of the present invention has both electric and manual spraying functions, it can be used for electric spraying when large-area spraying operations are required (e.g., spraying disinfectant or cleaner in a large area, or spraying nutrient solution in an outdoor garden); and it can be used for manual spraying when small-area spraying operations are required (e.g., spraying disinfectant or cleaner on small items or tabletops, or spraying nutrient solution in small potted plants indoors); in addition, if the battery power is insufficient during electric spraying operations, the manual mode can be used to continue the unfinished spraying operations.

[0046] Figures 12 to 19b show a liquid dispenser 200 according to a second preferred embodiment of the present invention, which is similar to the liquid dispenser 100 of the first embodiment, except that the flow path 211 in this example is not rotated, but the manual or electric pumping path is switched by a pressure control button 140. For this purpose, the electronic control unit in this example further includes a timing circuit with a timing start time. Thus, when the electronic control unit in this example is activated by the microswitch 171, the timing circuit is activated first, and then the electronic control unit supplies power to the motor 160 only when the timing start time is reached (unlike the first embodiment of the liquid dispenser 100, where the electronic control unit is activated by the microswitch 171 and immediately supplies power to the motor 160).

[0047] The timing start time is preferably set to more than 1 second (however, it can also be set to 2 seconds, 3 seconds or longer) so that the user can select to switch between manual and electric pumping paths by the dwell time of the control button 140 to the second position. For example, if the user presses the release button 140 at a familiar speed, since the dwell time of the button 140 in the second position at the familiar speed is much less than 1 second, the electronic control unit will not be activated. Instead, the manual pumping action caused by pressing the release button 140 will form the manual pumping path W22. Or, if the user deliberately presses the button 140 to the second position and holds it for more than 1 second, the electronic control unit will supply power to the motor 160 to run when the timing start time is reached, thereby causing the electric pumping action and forming the electric pumping path W11.

[0048] Since the flow path 211 in this example is not rotated, it has an extended portion 211a that protrudes forward from the front end of the circular cavity 204. Thus, when the button 140 of the push piston 141 is biased forward by the return spring 149, it normally protrudes from the front end of the extended portion 211a. Between the outer periphery of the flow path 211 and the inner periphery of the circular cavity 204, a positioning recess and a protrusion (not shown) are provided in the conventional art to prevent the flow path 211 from rotating.

[0049] In this example, a pump inlet hole 214 is radially opened inward from the outer periphery of the flow path section 211, and a pump outlet hole 215 and a pump outlet groove 216 are interconnected with each other; the pump inlet hole 214 and the pump outlet hole 215 are respectively connected to the manual pump chamber P2 through the one-way inlet valve 131 and the one-way outlet valve 132.

[0050] Regarding the operation of the liquid dispenser 200: As shown in Figures 13 and 14, since the inlet channel 119a and the outlet channel 119c can be fluidly coupled to the inlet port 106 and the first through port 109a respectively, and the pump inlet port 214 and the pump outlet channel 216 can be fluidly coupled to the inlet port 106 and the second through port 109b respectively; therefore, as shown in Figures 15, 16, and 18a, when the user presses and releases the button 140 back and forth at a habitual speed to manually pump the manual pump chamber P2, it can cause the inlet port 106 to sequentially pass through the pump inlet port 214. 4. A valve seat inlet 225, a one-way inlet valve 131, a manual pump chamber P2, a pump chamber outlet 136, a one-way outlet valve 132, a valve seat outlet 226, a pump outlet hole 215, a pump outlet groove 216, a second through hole 109b, a second inlet 152b, a wall groove 153, a manual pumping outlet 155b, and a pumping manifold 156 are connected to a nozzle 181, thus forming a manual pumping path W22, so that the liquid L1 in the container 190 can be sprayed out from the nozzle 181 in a manual pumping spraying mode through the manual pumping path W22.

[0051] As shown in Figures 17 and 18b, when the user presses button 140 to the second position and holds it for more than 1 second, the micro switch 171 is activated, which will start the electronic control unit. The electronic control unit will supply power to the motor 160 to run when the timer starts, thus generating an electric pumping action in the electric pump chamber P1. Through the electric pumping action, the liquid L1 in the container 190 can be pumped to the nozzle 181 through the electric pumping path W11 described above and sprayed out.

[0052] Figures 20a and 20b show a variant example of a liquid applicator 200a, which is similar to the liquid applicator 200 of the second embodiment, except that the liquid applicator 200a is equipped with a trigger 290, which can actuate the piston 141 by pushing the button 240 backward by the pusher 299 on its back.

[0053] Figures 21 to 32 show the liquid dispenser 300 of the third preferred embodiment of the present invention, which is similar to the liquid dispensers (100 and 200) of the first and second embodiments, except that: this example can perform three dispensing functions: electric pumping spraying, manual pumping spraying, and gravity flow. Therefore, in this example, a release portion 380 containing a nozzle 381 and an outlet 382 protrudes outward from the front wall 102 of the electric pump cavity R11; furthermore, when the flow path portion 311 of the liquid dispenser 300 is rotated to the first flow path position, an alignment indicator T is provided on the outer periphery of the rotation control portion 312 and is engraved with "". "The electric and manual spraying mark Md indicates that electric and manual spraying operations can be performed at this flow path position; when the flow path 311 is rotated to the second flow path position, an alignment indicator T is provided on the outer periphery of the rotation control part 312 and is engraved with it." "The outflow mark Mc indicates that an outflow application operation can be performed at this flow path location."

[0054] The discharge section 380 has a tube body 380b that protrudes forward and upward on the front wall 102, and the outlet 382 and the nozzle 381 are both located inside the tube body 380b. In this example, the pump outlet 302b is located inside and above the outlet 382, ​​so after the nozzle 381 is inserted into the pump outlet 302b, it appears inside and above the outlet 382.

[0055] The tube body 380b has an internal ramp 387 surrounding the outer periphery of the outlet 382. The ramp 387 extends downward and backward from below the front end of the outlet 382 and is co-constructed with the front wall 102. The ramp 387 extends backward through the front wall 102 at its rear end surface and has two inwardly connected front wall through holes 303 that connect to the electric pump cavity R11. The outlet 382 has an outlet through hole 382a that penetrates the front wall 102 and connects inwardly to the electric pump cavity R11. It should be understood that the cross-sectional area of ​​the outlet through hole 382a is larger than the cross-sectional area of ​​the front wall through hole 303. Therefore, when the user flips the liquid dispenser 300 downward for a flow-out dispensing operation, the liquid L1 in the container 190 will only flow out from the outlet through hole 382a, while outside air enters the container 190 through the front wall through hole 303 to balance the pressure difference between the inside and outside of the container (as shown in Figure 30).

[0056] The discharge section 380 has a cap seat 386 with a cap 385 at its front opening 380a to prevent the nozzle 381 and the outlet 382 from being contaminated by the outside. The inner periphery of the cap seat 386 has an inner ring flange 388, which can form an arc or ring-shaped connection of the liquid that may leak out by means of the cohesive force of the liquid, so as to prevent the residual liquid of the nozzle 381 and the outlet 382 from leaking out.

[0057] In this example, the electric pump cavity R11 defines a temporary storage space R14 for storing residual liquid, which is located below the electric pump unit 150 and the front wall 102. In addition, the bottom wall of the circular cavity 304 is provided with a lower through hole 305a that connects to the interior of the container 190, and the top wall is provided with an upper through hole 305b that connects to the upper part of the temporary storage space R14. Furthermore, the flow path 311 is provided with an arc-shaped channel 384 and an axial air guide groove 317 in a radially concave shape on its outer periphery. The newly added axial air guide groove 317 intersects with the original arc-shaped air guide groove 117 (as shown in Figure 31a).

[0058] Regarding the operation of the liquid applicator 300 in this example: please refer to Figures 26 to 28 and Figure 31a. The flow path 311 in the figures is in the first flow path position. In this position, it is shaped like... The electric and manual spraying mark Md is aligned with the virtual indicator VT (as shown in Figure 31a), indicating that electric and manual spraying operations can be performed at this flow path position. Figures 26 and 27 show manual pumping spraying operations being performed, while Figure 28 shows electric pumping spraying operations being performed. Since the operation mode of these two pumping spraying operations is the same as that of the second embodiment (see Figures 15 to 18b), it will not be described again.

[0059] Next, please refer to Figures 29, 30, and 31b, where the flow path 311 shown has been rotated to the second flow path position. In this position, it is shaped like... The outflow marker Mc is aligned with the virtual indicator VT. Correspondingly, the arc-shaped channel 384 can simultaneously fluidly couple the lower through-hole 305a and the upper through-hole 305b. This allows the lower through-hole 305a to sequentially pass through the arc-shaped channel 384, the upper through-hole 305b, the temporary storage space R14, and the outflow through-hole 382a, thus forming an outflow path W33 connected in series with the outflow nozzle 382. In addition, the arc-shaped air guide groove 117 and the axial guide... The air groove 317 can be fluidly coupled to the upper air inlet 107a and the return hole 108, so that the front opening 380a of the release part 380 can be connected in series with the front wall through hole 303, the axial air inlet groove 157a, the arc-shaped air inlet groove 157b, the upper air inlet 107a, the arc-shaped air guide groove 117, the axial air guide groove 317, and the return hole 108 to form a ventilation path W43 (as shown in Figure 30).

[0060] Therefore, when the user flips the liquid dispenser 300 downwards, the liquid L1 in the container will flow outwards along the outflow path W33 from the outlet 382 due to its own weight. When the liquid L1 continues to flow out and a vacuum phenomenon with negative pressure suction is generated in the container 190, the negative pressure suction can draw in outside air A from the front opening 380a, and then flow into the container 190 through the ventilation path W43. At this time, if the amount of liquid L1 in the container is large enough to flood the return hole 108, the air A will pass through the return hole 108 and mix into the liquid L1 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 190.

[0061] As shown in Figure 32, when the flow path 311 is in the first flow path position, the residual liquid L3 flowing down from the tip of the nozzle 381 can flow down along the outlet orifice 382a into the temporary storage space R14 for temporary storage, and the residual liquid L3 flowing down from the tip of the outlet nozzle 382 can flow down along the ramp 387 and the fluid through-hole 303 into the temporary storage space R14 for temporary storage. Since the residual liquid L3 can be stored in the temporary storage space R14, it can prevent the residual liquid L3 from flowing to the grip 101a and contaminating the user's palm. It should be understood that when the user rotates the flow path 311 to the second flow path position (as shown in Figure 29), the residual liquid L3 temporarily stored in the temporary storage space R14 can flow down through the upper through-hole 305b, the arc-shaped channel 384, and the lower through-hole 305a back into the container 190 for recycling.

[0062] Figures 33 to 35 show a liquid applicator 400 of the fourth preferred embodiment of the present invention, which is similar to the liquid applicators (100, 200, 300) of the first to third embodiments, except that: in this example, a trigger 490 with a front wall opening 491 is used to push the piston 141. For this purpose, the rotary control part 412 and the flow path part 411 of the manual pump unit 410 in this example are designed separately. Moreover, the rotary control part 412 in this example includes a circular telescopic member 412b that is slidably inserted into the flow path part 411, and a knob 412a that passes through the front wall opening 491 and normally extends out in front of the trigger 490.

[0063] In this example, the rotary control unit 412 uses the knob 412a to rotate the flow path unit 411 back and forth between a first flow path position and a second flow path position. The knob 412a is fitted onto the reduced diameter portion in front of the circular telescopic member 412b, and is thus integrated with the circular telescopic member 412b. In addition, the piston 141 passes forward through a spring support 444 and a return spring 149 via its piston rod 442, and is then inserted into the interior of the circular telescopic member 412b, thus being integrated with the knob 412a.

[0064] An annular groove 413 is defined between the rear end of the knob 412a and the shoulder of the reduced diameter section of the circular telescopic member 412b. The trigger 490 is pivotally mounted in front of the circular cavity 404, and its back is provided with a pair of cylindrical pushers 499 that can be engaged with the sides of the annular groove 413. When the trigger 490 is pulled back by the user, the pushers 499 will push the shoulder of the reduced diameter section of the circular telescopic member 412b back, thereby pushing the circular telescopic member 412b back and causing the piston 141 of the manual pump chamber P2 to move from the initial first position to the second position. When the force applied by pulling the trigger 490 is released, the bias force of the return spring 149 can push the circular telescopic member 412b and the piston 141 forward back to the first position.

[0065] The flow path 411 shown in Figure 34 is in the first flow path position. The figure shows that the circular telescopic member 412b has a push rod 143 at its rear end that can pass through the axial through hole 118. When the user rotates the knob 412a and rotates the circular telescopic member 412b in sync, the flow path 411 can be rotated to the second flow path position by the rotational force of the push rod 143 toward the side wall of the axial through hole 118.

[0066] When the flow path 411 is in the first flow path position and the trigger 490 is pulled back to push the circular telescopic member 412b to the second position, the push rod 143 can be pushed back to activate the trigger rod 173, thereby activating the micro switch 171. The micro switch 171 is used to start the electronic control unit. When the trigger 490 is pulled to the second position and remains there for more than 1 second, the electronic control unit will supply power to the motor 160 to operate when the timer start time is reached, so as to generate an electric pumping action in the electric pump chamber P1 and spray the liquid L1 in the container 190 from the nozzle 181 (please refer to the detailed description of the liquid applicator 200 in the second embodiment).

[0067] Regarding the operation of the liquid applicator 400 in this example: As shown in the figure, a shape resembling a "" is provided on the wall in front of the trigger 490. "The arrow-shaped indicator T, and two marks are provided on the outer periphery of the knob 412a; one of the marks is engraved..." "The electric and manual spraying mark Md indicates that when the flow path section 411 is rotated to the first flow path position, it is aligned with the indicator T, indicating that electric and manual spraying operations can be performed at this flow path position; another mark is engraved..." The outlet mark Mc is aligned with the indicator T when the flow path section 411 is rotated to the second flow path position, indicating that an outlet dispensing operation can be performed at this flow path position. Since the operation mode in the first and second flow path positions in this example is the same as the operation mode of the liquid dispenser 300 in the third embodiment (as shown in Figures 26 to 31b), it will not be described again.

[0068] In summary, the liquid dispensers (100, 200, 300, 400) of this invention are not only novel but also highly advanced. By operating the manual pump unit (110, 210, 310, 410), the flow path of fluid between the inside and outside of the container 190 can be easily changed, allowing the liquid inside the container to be dispensed and used by the user in various modes. From a commercial perspective, since the components of the liquid dispenser of this invention are suitable for plug-in automated assembly, the assembly space between the components is greatly reduced, resulting in a compact and marketable finished product. Furthermore, since manual assembly is not required, manufacturing costs are significantly reduced, and the finished product can achieve a safe and reliable quality guarantee.

[0069] The above examples illustrate four preferred embodiments of the present invention in conjunction with the accompanying drawings. Those skilled in the art can still 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.

[0070] 100, 200, 300, 400: Liquid applicators 101a: Grip section 101b: Tobu 102: Anterior wall 102a: Manifold 102b, 302b: Pump nozzle 103,303: Front wall through hole 104, 204, 304, 404: Circular cavity 104a: Forward extension 104b: Electrically controlled through hole 104c: Convex tube 106: Draw-in hole 107a: Top air intake 107b: Lower air intake 108: Return hole 109a: First through hole 109b: Second through hole 110, 210, 310, 410: Manual pump unit 111,211,311,411: Flow path part 112, 312, 412: Rotation control unit 113: Round cylinder 114a: First pump inlet hole 114b: Second pump inlet port 115a: First pump outlet 115b: Second pump outlet 116,216: Pump out of trench 117: Arc-shaped air guide groove 118: Axial perforation 119: Electric pumping trough 119a: Drainage trench 119b: Arc-shaped guide channel 119c: Pumping out of the trench 120, 220: Composite valve seat 121: Inlet valve seat 122: Outlet valve seat 125a: First inlet of valve seat 125b: Second inlet of valve seat 126a: Valve seat first outlet 126b: Second outlet of valve seat 130: Composite Valve 131: One-way inlet valve 132: One-way outlet valve 136: Pump chamber outlet 140, 240: Buttons 141: Piston 142,242,442: Piston rod 143: Putting 144,444: Spring bearing 145: Inner ring flange 146: Outer ring flange 149: Return spring 150: Electric pump unit 151: Pump sleeve 152a: First Entrance 152b: Second Entrance 153: Wall grooves 154a: Pump socket 154b: Valve seat 155a: Electric pump outlet 155b: Manual pump outlet 156: Pumping manifold 157a: Axial intake groove 157b: Arc-shaped air intake groove 159: Joint 160: Motor 161: Electric pump 162: Pump plug 165a: Pump chamber inlet 165b: Pump chamber outlet 167: One-way outlet valve 170: Circuit board 171: Micro switch 173: Trigger lever 174: Elastic sealing sleeve 175, 176: Electrical contacts 177: Flexible electrical connector 178: Indicator Light 179: Sealing Cap 180: Battery 181,381: Nozzle 190: Container 191: Container opening 193: Straw 195: Intake valve 211a: Extended portion 214: Pump inlet hole 215: Pump outlet port 225: Valve seat inlet 226: Valve seat outlet 290, 490: Trigger 297,497: Pivot 298,498: Pivot 299,499: Pushing parts 305a: Bottom through hole 305b: Top through hole 317: Axial air guide groove 380: Release Section 380a: Front opening 380b: Pipe body 382: Drooling from the mouth 382a: Outflow through hole 384: Curved Channel 385: Capping 386: Cap Seat 387: Slope 388: Inner ring flange 412a: Knob 412b: Circular telescopic component 413: Annular groove 491: Anterior wall opening A: Air B: After C: Axial centerline D: Down F: Front L1: Liquid inside the container L2: Refluxed liquid L3: Residual liquid LB: Bubble Ma: Electric ejection mark Mb: Manual spray mark Mc: Outflow indicator Md: Electric and manual spray mark P1: Electric Pump Room P2: Manual Pump Chamber R10: Electric pump chamber R11: Electric pump cavity R12: Battery cavity R13: Rear Space R14: Temporary storage space T: Indicator U:Up VT: Virtual Indicator W11: Electric pumping path W21, W22: Manual pumping path W33: Outflow path W41, W43: Ventilation Path W61: Liquid Reflux Path

Claims

1. A liquid dispenser, with a container attached to its bottom, comprising: an electric pump chamber, the bottom wall of which forms an electric pump cavity upwards; a nozzle protruding outwards from the front wall of the electric pump cavity; a circular cavity having an inlet hole communicating with the interior of the container, and a first through hole and a second through hole communicating with the electric pump cavity; an electric pump unit having an electric pump chamber, inserted into the electric pump cavity; and a manual pump unit having a manual pump chamber, a rotary control portion, and a flow path portion inserted into the circular cavity, the outer periphery of the flow path portion having an electric suction groove; wherein... The flow path section can be rotated back and forth by the control section between a first flow path position and a second flow path position. In the first flow path position, the inlet hole can pass through the electric suction groove, the first through hole and the electric pump chamber, and form an electric pumping path in series with the nozzle. In the second flow path position, the inlet hole can pass through the manual pump chamber and the second through hole, and form a manual pumping path in series with the nozzle.

2. The liquid dispenser as claimed in claim 1, wherein the circular cavity is further provided with a reflux hole communicating with the interior of the container, and the manual pump unit further comprises a first pump inlet hole, a second pump inlet hole, a first pump outlet hole, and a second pump outlet hole and a pump outlet groove respectively drilled radially inward from the outer periphery of the flow path portion; wherein, The first pump inlet and the second pump inlet are connected to the manual pump chamber through a one-way inlet valve, and the first pump outlet and the second pump outlet are connected to the manual pump chamber through a one-way outlet valve. In the first flow path position, the electric suction channel is simultaneously fluid-coupled to the suction port and the first through hole, and the first pump inlet and the first pump outlet are each fluid-coupled to the suction port and the return port. In the second flow path position, the second pump inlet and the pump outlet channel are each fluid-coupled to the suction port and the second through hole.

3. The liquid dispenser as claimed in claim 1, wherein a manifold is recessed in the front wall of the electric pump chamber and protrudes rearward, and the electric pump unit has a pumping manifold connected to the manifold; wherein, The first through-hole connects to the nozzle through the electric pump chamber, a one-way outlet valve, and the pumping manifold; and the second through-hole connects to the nozzle through a wall groove and the pumping manifold.

4. The liquid applicator as described in claim 1, wherein, The electric pump chamber generates electric pumping by the operation of a motor, while the manual pump chamber generates manual pumping by a piston that can be pushed by a button. The button is biased by a return spring and normally extends outward from the front end of the rotary control unit.

5. The liquid applicator as described in claim 4, wherein, The flow path section has an axial through hole, and the button has a push rod passing through the axial through hole; the side wall of the circular cavity has an electrical control through hole communicating with the electric pump chamber, so that an actuating rod can pass through it; the electric pump chamber has a circuit board with a micro switch. When the button is pressed backward to the second position at the first flow path position, it can cause the push rod to push the actuating rod backward and trigger the micro switch, so as to start an electronic control unit and make the motor run by means of the micro switch.

6. The liquid applicator as claimed in claim 5, wherein the electronic control unit includes a self-holding circuit.

7. The liquid applicator as described in claim 5, wherein, The circuit board is equipped with four flexible electrical contacts. When the rear opening of the electric pump chamber is covered by a sealing cover, the flexible electrical contacts of the four flexible electrical contacts can be elastically pressed towards the two electrical contacts of the motor and the two electrical contacts of the battery to facilitate a flexible electrical connection.

8. A liquid dispenser, with a container attached to its bottom, comprising: an electric pump chamber, the bottom wall of which forms an electric pump cavity upwards; a nozzle protruding outwards from the front wall of the electric pump cavity; a circular cavity having an inlet hole communicating with the interior of the container, and a first through hole and a second through hole communicating with the electric pump cavity; an electric pump unit having an electric pump chamber, inserted into the electric pump cavity; and a manual pump unit having a manual pump chamber, a button, and a flow path portion inserted into the circular cavity, the outer periphery of the flow path portion having an electric suction groove; wherein... When the button is pressed and moves back and forth between a first position and a second position at a conventional speed, the inlet can pass through the manual pump chamber and the second through hole to form a manual pumping path in series with the nozzle; when the button is pressed and held in the second position for more than 1 second, the inlet can pass through the electric suction groove, the first through hole and the electric pump chamber to form an electric pumping path in series with the nozzle.

9. The liquid applicator as described in claim 8, wherein, The electric suction groove can be fluidly coupled to the inlet hole and the first through hole simultaneously; in addition, the manual pump unit also has a pump inlet hole radially drilled inward on the outer periphery of the flow path, and a pump outlet hole and a pump outlet groove that are interconnected with each other; the pump inlet hole and the pump outlet hole are respectively connected to the manual pump chamber through a one-way inlet valve and a one-way outlet valve, and the pump inlet hole and the pump outlet groove can be fluidly coupled to the inlet hole and the second through hole respectively.

10. The liquid applicator as described in claim 8, wherein, The electric pump chamber generates electric pumping by the operation of a motor, while the manual pump chamber generates manual pumping by a piston that can be pushed by a button. The button is normally extended outward from the front end of the extended portion of the flow path section due to the bias of a return spring. In addition, the flow path section has an axial through hole, and the button has a push rod that passes through the axial through hole. The side wall of the circular cavity has an electrical control through hole that connects to the electric pump chamber, through which an actuating rod is inserted. When the button is pressed back to the second position, it causes the push rod to push the actuating rod back, thereby actuating a micro switch, which in turn activates an electronic control unit. When the button is pressed in the second position and remains there for more than 1 second, the electronic control unit can supply power to the motor to operate.

11. The liquid dispenser as claimed in claim 10, wherein the electronic control unit includes a timing circuit having a timing start time.

12. A liquid dispenser, its bottom connected to a container, comprising: an electric pump chamber, the bottom wall of which forms an electric pump cavity upwards; a dispensing portion having a nozzle and an outlet, protruding outwards from the front wall of the electric pump cavity; a circular cavity having an inlet and a lower through hole communicating with the interior of the container, and a first through hole, a second through hole, and an upper through hole communicating with the electric pump cavity; an electric pump unit having an electric pump chamber, inserted into the electric pump cavity; and a manual pump unit having a manual pump chamber, a rotary control portion, and a flow path portion inserted into the circular cavity, the outer periphery of the flow path portion having an electric dispensing groove and an arc-shaped channel; wherein... The flow path section can be rotated back and forth by the control section between a first flow path position and a second flow path position. In the first flow path position, the inlet hole can pass through the manual pump chamber and the second through hole to form a manual pumping path in series with the nozzle, or pass through the electric suction groove, the first through hole and the electric pump chamber to form an electric pumping path in series with the nozzle. In the second flow path position, the lower through hole can pass through the arc-shaped channel and the upper through hole to form an outlet path in series with the outlet nozzle.

13. The liquid dispenser as claimed in claim 12, wherein the manual pump unit further comprises a pump inlet hole radially inwardly formed at the outer periphery of the flow path portion, and a pump outlet hole and a pump outlet groove interconnected therewith, the pump inlet hole and the pump outlet hole being respectively connected to the manual pump chamber through a one-way inlet valve and a one-way outlet valve; in the first flow path position, the electric suction groove is simultaneously fluidly coupled to the suction hole and the first through hole, and the pump inlet hole and the pump outlet groove are respectively fluidly coupled to the suction hole and the second through hole; in the second flow path position, the arcuate channel is simultaneously fluidly coupled to the lower through hole and the upper through hole.

14. The liquid applicator as described in claim 12, wherein, The electric pump chamber generates electric pumping by the operation of a motor, while the manual pump chamber generates manual pumping by a piston that can be pushed by a button. The button is normally extended outward from the front end of the rotary control section due to the bias of a return spring. In addition, the flow path section has an axial through hole, and the button has a push rod that passes through the axial through hole. The side wall of the circular cavity has an electrical control through hole that connects to the electric pump chamber, through which an actuating rod is inserted. When the button is pressed backward to the second position in the first flow path position, it can cause the push rod to push the actuating rod backward, thereby actuating a micro switch, which in turn activates an electronic control unit. When the button is pressed in the second position and remains there for more than 1 second, the electronic control unit can supply power to the motor to operate.

15. The liquid applicator as described in claim 12, wherein, The liquid dispenser also includes a trigger with a front wall opening; and the rotary control includes a knob that extends normally outward from the front wall opening and a circular telescopic member that is slidably inserted into the flow path; the manual pump chamber generates manual pumping by means of a piston that can be pushed by the circular telescopic member, and the trigger is provided with a pushing member for pushing the circular telescopic member.

16. The liquid applicator as described in claim 15, wherein, The rotary control unit uses a knob to rotate the flow path section.

17. The liquid applicator as described in claim 15, wherein, The electric pump chamber generates an electric pumping action by the operation of a motor. In addition, the flow path is provided with an axial through hole, and the circular telescopic member has a push rod passing through the axial through hole. The side wall of the circular cavity is provided with an electrical control through hole that connects to the electric pump chamber, so that an actuating rod can pass through it. When the circular telescopic member is pushed backward to the second position by the trigger at the first flow path position, the push rod can be pushed backward to move the actuating rod, thereby triggering a micro switch, which in turn activates an electronic control unit. When the circular telescopic member is pushed to the second position and remains there for more than 1 second, the electronic control unit can supply power to the motor to operate.

18. The liquid dispenser as claimed in claim 12, wherein both the nozzle and the outlet are disposed inside the tube of the dispensing portion, and the electric pump cavity defines a temporary storage space; wherein, The residual liquid flowing out from the nozzle tip flows into the temporary storage space through an outflow hole, and the residual liquid flowing out from the nozzle tip flows into the temporary storage space through a front wall through-hole.

19. The liquid applicator as described in claim 18, wherein, The upper through-hole is connected to the outlet nozzle through the temporary storage space and the outlet through-hole.

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