CN116369770A - Foam output method - Google Patents

Abstract

The utility model provides a foam output method, which comprises a first output mode and a second output mode; in a first output mode, receiving a first trigger signal generated by a first trigger device, and controlling a foam generating device to convey foam to a spray head based on the first trigger signal, wherein the foam is jointly output through a first channel and a second channel of the spray head; in a second output mode, receiving a second trigger signal generated by a second trigger device, and controlling the foam generating device to convey foam to the spray head based on the second trigger signal, wherein the foam is output through a first channel of the spray head; the second trigger signal is generated by triggering the second trigger device when the spray head is operated to block the second channel. The utility model has the advantages that: the first output mode and the second output mode are specific, and a user can control the foam to be output in different modes according to actual needs, so that the use requirements of various occasions can be well met.

Description

Foam output method

[ field of technology ]

The utility model relates to the technical field of foam machine products, in particular to a foam output method.

[ background Art ]

In daily life, people are habitually using some washing products or skin care products, such as hand washing liquid when washing hands, shampoo when washing hair, sun cream when going out in summer, and the like. The washing products or skin care products are stored in the bottle body purchased at random, and liquid is usually obtained through a cover opening mode or a pressing head extruding mode when the washing products or skin care products are used, however, whether the washing products or the skin care products are obtained through the cover opening mode or the pressing head pressing mode, the washing products or the skin care products are required to be repeatedly rubbed into foam later.

In recent years, with the improvement of life quality of people, higher requirements are put on liquid discharge modes of products such as liquid soap, liquid detergent, shampoo and the like, and foam machines are also appeared. The foam machine pumps the liquid and the gas to the gas-liquid mixing cavity for mixing by adopting the electric foam pump, so that the washing product or the skin care product can be directly sprayed out in a foam mode, and the washing product or the skin care product does not need to be repeatedly rubbed when in use.

In the prior art, the foam machine is used for realizing output foam by sensing and pressing one of key switches through a sensor, such as a hand washing foam machine disclosed in Chinese patent application No. CN202021151464.X, and comprises a bottle body, a shell, an electric foam pump, a control circuit part, a battery, an output pipe, a liquid suction pipe and the sensor. In another example, the Chinese patent application No. 202023093911.3 discloses a hand sanitizer machine with two liquid outlets, and the hand sanitizer machine can realize two liquid outlet states by pressing the key switch through the design of two liquid storage bottles, two pump bodies and two key switches. However, in actual use, in some situations the user may wish to deliver foam inductively, such as during hand washing; in other applications, the user may wish to deliver foam in a pressing manner, such as when washing a door or window; however, the existing foam machine outputs foam either through the mode of sensing by an inductor or through the mode of pressing a key switch, so that the use requirements of various occasions cannot be met. In view of the above problems, the present inventors have conducted intensive studies on the problems, and have produced the present utility model.

[ utility model ]

The utility model aims to solve the technical problem of providing a foam output method, which solves the problem that the prior foam machine can not meet the use requirements of various occasions by outputting foam in a mode of sensing by an inductor or outputting foam in a mode of pressing a key switch.

The utility model is realized in the following way: a foam output method, the method comprising a first output mode and a second output mode;

in the first output mode, a first trigger signal generated by a first trigger device is received, the foam generating device is controlled to convey foam to the spray head based on the first trigger signal, and the foam is jointly output through a first channel and a second channel of the spray head;

in the second output mode, receiving a second trigger signal generated by a second trigger device, and controlling the foam generating device to convey foam to the spray head based on the second trigger signal, wherein the foam is output through a first channel of the spray head; the second trigger signal is generated by triggering the second trigger device when the spray head is operated to block the second channel.

Further, the channel cross-sectional area of the first channel is smaller than the channel cross-sectional area of the second channel; in the first output mode, the foam is jointly output in a flow manner through a first channel and a second channel; in the second output mode, the foam is output through the first channel in a spray manner.

Further, a pushing rod is arranged at the bottom of the spray head, and the input end of the first channel is positioned at the bottom of the pushing rod; a movable assembly is arranged below the pushing rod, and the second trigger device is arranged below the pushing rod;

when the spray head is pressed, the bottom surface of the pushing rod is in contact with the top surface of the movable assembly to block the second channel, and meanwhile, the pushing rod pushes the movable assembly to move, so that the movable assembly pushes the second trigger device to generate a second trigger signal; when the spray head is loosened, the movable assembly is reset upwards and is separated from contact with the second trigger device, and the spray head is reset upwards and is separated from contact with the movable assembly.

Further, a liquid outlet is formed in the outer wall of the spray head, the output ends of the first channel and the second channel are communicated with the liquid outlet, and the cross section of the output end of the first channel is circular.

Further, the method further comprises: in the process of outputting foam through the first channel of the spray head, if a first trigger signal generated by the first trigger device is received, the first trigger device is controlled to enter a shielding state, and in the shielding state, the first trigger signal loses control effect on the foam generating device.

Further, the method further comprises: receiving a third trigger signal generated by the first trigger device, and controlling the first trigger device to exit from a shielding state based on the third trigger signal; the first trigger signal and the third trigger signal are generated under different conditions.

Further, the first triggering device is an inductive switch.

Further, the second triggering device is a key switch.

By adopting the technical scheme of the utility model, the utility model has at least the following beneficial effects:

1. the foam is jointly output through the first channel and the second channel of the spray head in the first output mode, the flow speed of the foam is gentle, the foam can flow downwards after being output, and the foam is suitable for being used in occasions such as hand washing and face washing; in the second output mode, the foam is independently output through the first channel of the spray head, the flow speed of the foam is high, and the foam can be sprayed forwards during output, so that the foam is suitable for being used in occasions of cleaning doors and windows, spraying the gel, and the like; therefore, a user can control the foam to be output in different modes according to actual needs, and the use requirements of various occasions can be well met.

2. In the second output mode, when the second trigger device is triggered by operating the spray head to generate a second trigger signal, the second channel can be blocked at the same time, so that when the spray head is specifically used, not only can one foam generating device be shared to realize foam output of the first output mode and the second output mode, but also a switching structure is not required to be additionally arranged for channel switching, channel switching is not required to be carried out between the two output modes, and the switching of the output modes can be simultaneously completed when the spray head trigger signal is pressed; therefore, the whole structure of the foam machine can be well simplified, the whole structure of the foam machine is smaller, the whole cost of the foam machine can be reduced, the market competitiveness is improved, and the operation and the use are very convenient.

3. When foam is output through the first channel of the spray head, if the condition that the first trigger device generates a first trigger signal occurs, the first trigger device is controlled to enter a shielding state, so that the first trigger signal loses control function on the foam generating device, and the first trigger device is prevented from being triggered by mistake.

[ description of the drawings ]

The utility model will be further described with reference to examples of embodiments with reference to the accompanying drawings.

FIG. 1 is a block diagram of the execution flow of a foam output method of the present utility model;

FIG. 2 is an overall block diagram of the foam machine of the present utility model;

FIG. 3 is an exploded view of the foam machine of the present utility model;

FIG. 4 is a cross-sectional view of the foam machine of the present utility model;

FIG. 5 is an exploded view of the spray head and housing of the present utility model;

FIG. 6 is a cross-sectional view of the sprinkler head, housing and movable assembly of the present utility model after assembly;

FIG. 7 is an overall block diagram of the movable assembly of the present utility model;

FIG. 8 is an exploded view of the movable assembly of the present utility model;

FIG. 9 is a bottom view of the screw cap of the present utility model;

FIG. 10 is a block diagram of a sprinkler head according to the present utility model;

FIG. 11 is a bottom view of the spray head of the present utility model;

FIG. 12 is a top view of the base of the present utility model;

fig. 13 is a bottom view of the base of the present utility model.

Reference numerals illustrate:

a first triggering device 1;

foam generating device 2, liquid inlet pipe 21, air inlet pipe 22;

the spray head 3, the first channel 31, the second channel 32, the liquid outlet 33, the pushing rod 34, the guide sliding block 341, the movable column 35, the mounting part 36, the limiting piece 361, the blocking piece 362 and the annular groove 363;

a second triggering device 4;

the movable assembly 5, the trigger part 51, the piston body 52, the sealing ring 53, the sealing sheet 54, the guide ring 55, the guide groove 551 and the guide groove 552;

the casing 6, the outlet 61, the liquid passing chamber 62, the piston assembling chamber 621, the bearing step 622, the guide ring supporting step 623, the screw cap 63, the movable channel 631, the rotating groove 632, the slide-in opening 633, the base 64, the rotating slider 641, the seal cover 65, the trepanning 651, the attaching piece 652, the flat pad 66;

a housing 7, a screw connection port 71;

a bottle body 8;

and a control main board 9.

[ detailed description ] of the utility model

In order to better understand the technical scheme of the present utility model, the following detailed description will refer to the accompanying drawings and specific embodiments.

It should be noted herein that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing these embodiments and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operate in a specific orientation. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.

Because the existing foam machine outputs foam in a specific use mode through the induction of an inductor or outputs foam in a mode of pressing a key switch, the use requirements of various occasions cannot be met. Therefore, in the technical scheme of the embodiment of the utility model, a novel foam output method is provided, and the foam can be controlled to be output in different modes according to the needs of a user, so that the use requirements of various occasions are met, and the overall thought is as follows: when receiving the first trigger signal generated by the first trigger device 1, controlling the foam generating device 2 to generate foam and jointly output the foam through the first channel 31 and the second channel 32, wherein the foam flow rate is low because the foam is jointly output by the first channel 31 and the second channel 32, so that the foam can flow downwards when being output, and the foam generating device is suitable for being used in occasions such as hand washing, face washing and the like; when the spray head 3 is operated to trigger the second trigger device 4 to generate a second trigger signal, the second channel 32 can be blocked, and the foam generating device 2 is controlled to generate foam and output the foam through the first channel 31, so that the foam is only output through the first channel 31, the foam flow speed is high, and the foam can be sprayed forwards during the output, so that the spray head is suitable for being used in occasions of cleaning doors and windows, spraying and the like.

Referring to fig. 1 to 13, a preferred embodiment of a foam output method according to the present utility model is used for controlling a foam machine to output foam, and the method includes a first output mode and a second output mode;

in the first output mode, receiving a first trigger signal generated by the first trigger device 1, and controlling the foam generating device 2 to deliver foam to the spray head 3 based on the first trigger signal, wherein the foam is commonly output through a first channel 31 and a second channel 32 of the spray head 3;

in the second output mode, receiving a second trigger signal generated by the second trigger device 4, and controlling the foam generating device 2 to deliver foam to the spray head 3 based on the second trigger signal, wherein the foam is output through a first channel 31 of the spray head; the second trigger signal is generated by triggering the second trigger device 4 when the nozzle 3 is operated to block the second channel 32, that is, when the nozzle 3 is operated to trigger the second trigger device 4 to generate the second trigger signal, the second channel 32 can be blocked at the same time, so that the foam generated by the foam generating device 2 is output only through the first channel 31.

By adopting the technical scheme provided by the utility model, the method has at least the following beneficial effects:

1. the foam is jointly output through the first channel 31 and the second channel 32 of the spray head 3 in the first output mode, the flow speed of the foam is gentle, the foam can flow downwards after being output, and the foam is suitable for being used in occasions such as hand washing and face washing; in the second output mode, the foam is independently output through the first channel 31 of the spray head 3, the flow speed of the foam is high, and the foam can be sprayed forwards during output, so that the foam is suitable for being used in occasions of cleaning doors and windows, spraying the hair spray and the like; therefore, a user can control the foam to be output in different modes according to actual needs, and the use requirements of various occasions can be well met.

2. In the second output mode, when the second trigger device 4 is triggered by operating the spray head 3 to generate a second trigger signal, the second channel 32 can be blocked at the same time, so that when the spray head 3 is specifically used, not only can one foam generating device 2 be shared to realize foam output of the first output mode and the second output mode, but also a switching structure is not required to be additionally arranged for channel switching, channel switching is not required to be performed between the two output modes, and the switching of the output modes can be completed at the same time when the trigger signal of the spray head 3 is pressed; therefore, the whole structure of the foam machine can be well simplified, the whole structure of the foam machine is smaller, the whole cost of the foam machine can be reduced, the market competitiveness is improved, and the operation and the use are very convenient.

In the preferred embodiment of the present utility model, the first triggering device 1 is an inductive switch, and may specifically be an infrared inductive switch; in the first output mode, the user brings the first triggering device 1 to generate a first triggering signal by bringing the hand close to the first triggering device 1.

In the preferred embodiment of the present utility model, the second triggering device 4 is a key switch, and in the second output mode, the user presses the spray head 3, so as to trigger the second triggering device 4 to generate the second triggering signal.

In the preferred embodiment of the present utility model, the first channel 31 has a smaller channel cross-sectional area than the second channel 32; in the first output mode, the foam is jointly output in a flowing manner through the first channel 31 and the second channel 32; in the second output mode, the foam is output through the first channel 31 in a spray manner. Since the smaller the channel cross-sectional area, the faster the flow rate, and the larger the channel cross-sectional area, the slower the flow rate; therefore, by designing the channel sectional area of the first channel 31 to be smaller than that of the second channel 32, the foam flow rate is made fast in the second output mode, and the foam can be output in a forward-jet manner, whereas the foam flow rate is gentle in the first output mode due to the common output through the first channel 31 and the second channel 32, and thus the foam flows downward at the time of output.

In the preferred embodiment of the present utility model, the outer wall of the nozzle 3 is provided with a liquid outlet 33, and the output ends of the first channel 31 and the second channel 32 are both communicated with the liquid outlet 33, so that the foam can be output only through one liquid outlet 33 in the first output mode or the second output mode, thereby ensuring that a user can accurately spray the foam to a desired position. The channel section of the output end of the first channel 31 is circular so that the foam can be ejected forward better in the second output mode.

In the preferred embodiment of the present utility model, the bottom of the nozzle 3 is provided with a pushing rod 34, and the input end of the first channel 31 is located at the bottom of the pushing rod 34; a movable component 5 is arranged below the pushing rod 34, and the second triggering device 4 is arranged below the pushing rod 34;

when the spray head 3 is pressed, the bottom surface of the pushing rod 34 is in contact with the top surface of the movable assembly 5 to block the second channel 32, at this time, foam cannot be output through the second channel 32, and meanwhile, the pushing rod 34 pushes the movable assembly 5 to move, so that the movable assembly 5 pushes the second triggering device 4 to generate a second triggering signal; when the spray head 3 is released, the movable assembly 5 is reset upwards out of contact with the second triggering device 4, at which time the foam can be output through the second channel 32, and the spray head 3 is reset upwards out of contact with the movable assembly 5.

More specifically, please refer to fig. 2-4 with emphasis, the foam machine further includes a housing 6, a casing 7, a bottle body 8, and a control main board 9, wherein the first triggering device 1, the second triggering device 4, and the foam generating device 2 are all electrically connected with the control main board 9, and the first triggering device 1 is disposed on an outer wall of the casing 7; the foam generating device 2 and the control main board 9 are both arranged in the casing 7, the casing 6 is fixedly connected with the upper end of the casing 7 in a sealing way, namely, the casing 6 is used as an upper cover of the casing 7, and the upper end of the casing 7 is sealed through the casing 6 so as to realize a waterproof effect; the control main board 9 is fixedly arranged at a position adjacent to the shell 6 in the shell 7, the second trigger device 4 is fixedly arranged on the control main board 9, the movable assembly 5 is movably arranged in the shell 6, the spray head 3 is movably arranged on the shell 6, the shell 6 is provided with an extension port 61, the movable assembly 5 is provided with a trigger part 51 extending out of the shell 6 through the extension port 61, and the trigger part 51 is correspondingly arranged with the second trigger device 4, so that when the spray head 3 is pressed to drive the movable assembly 5 to move, the trigger part 51 of the movable assembly 5 can be contacted and pressed with the second trigger device 4, and the second trigger device 4 generates a second trigger signal; the housing 6 is internally provided with a liquid passing cavity 62, the output end of the foam generating device 2 is communicated with the liquid passing cavity 62, and the first channel 31 and the second channel 32 are both communicated with the liquid passing cavity 62, so that the foam generated by the foam generating device 2 can be conveyed to the liquid passing cavity 62 and output through the first channel 31 and the second channel 32; the lower end of the shell 7 is provided with a threaded connection port 71, the bottle body 8 is in threaded connection with the threaded connection port 71, the foam generating device 2 is provided with a liquid inlet pipeline 21 inserted into the bottle body 8 and an air inlet pipeline 22 communicated with the external atmosphere, so that the foam generating device 2 can suck liquid in the bottle body 8 and external air through the liquid inlet pipeline 21 and mix the liquid and the air to generate foam when in operation; the foam generating device 2 employs an electric foam pump, which has been widely used in the prior art, and the specific structure thereof is well known to those skilled in the art, and the specific structure of the electric foam pump will not be described in detail herein.

As an embodiment of the movable assembly 5 of the present utility model, please refer to fig. 7-8, wherein the movable assembly 5 includes:

a piston body 52, a lower end of the piston body 52 serving as the trigger portion 51;

a sealing ring 53, wherein a piston assembling cavity 621 is arranged at the bottom of the liquid passing cavity 62, and the piston assembling cavity 621 is communicated with the extension port 61, so that the triggering part 51 can extend out of the shell 6 through the extension port 61; a bearing step 622 is formed in the piston assembling cavity 621, and the seal ring 53 is arranged on the bearing step 622; the piston body 52 is arranged above the sealing ring 53, and the triggering part 51 of the piston body 52 penetrates through the sealing ring 53 and extends to the extension port 61; wherein, the bearing step 622 can support the whole movable assembly 5, so that the movable assembly 5 cannot fall from the extending opening 61 when the pushing rod 34 pushes the movable assembly 5 to move; the sealing ring 53 may be a rubber sealing ring, the inner wall of the sealing ring 53 is closely attached to the triggering portion 51, and the outer wall of the sealing ring 53 is closely attached to the cavity wall of the piston assembly cavity 621, so that after the movable assembly 5 is installed in the piston assembly cavity 621, the sealing ring 53 can perform a good sealing function, and foam cannot leak out from the extension port 61;

a sealing plate 54, the sealing plate 54 being disposed on top of the piston body 52; the sealing piece 54 can seal and block the second channel 32 when the pushing rod 34 contacts with the sealing piece 54, meanwhile, in the implementation of the utility model, the sealing piece 54 can be a rubber sealing piece, the outer edge of the sealing piece 54 is tightly contacted with the cavity wall of the piston assembling cavity 621, so that the sealing piece 54 can also seal the gap between the piston body 52 and the piston assembling cavity 621, thereby further preventing foam from seeping out from the outlet 61;

a guide ring 55, the guide ring 55 being disposed at an upper end of the piston assembly chamber 621, in particular, the guide ring 55 is closely assembled with an upper end of the piston assembly chamber 621 such that the guide ring 55 is not separated, the guide ring 55 being located above the sealing plate 54; the guide ring 55 can limit the piston body 52, the sealing ring 53 and the sealing piece 54 which are installed in the piston assembling cavity 621, so that the piston body 52, the sealing ring 53 and the sealing piece 54 cannot be separated from the piston assembling cavity 621, and meanwhile, the guide ring 55 can limit the upward stroke of the sealing piece 54, so that the push rod 34 can be separated from the sealing piece 54 after the spray head 3 rebounds upwards; in the embodiment of the present utility model, a guide ring supporting step 623 is formed on the inner wall of the upper end of the piston assembly cavity 621, the guide ring 55 is supported on the guide ring supporting step 623, and a gap can be reserved between the lower end of the guide ring 55 and the sealing plate 54, so that the piston body 52 can perform the up-and-down movement better.

When the movable assembly 5 specifically works, when the pushing rod 34 is pushed to push the piston body 52 to move downwards by pressing the spray head 3, the triggering part 51 of the piston body 52 can extend out from the extending opening 61 and press the second triggering device 4 downwards, so that the second triggering device 4 can trigger the foam generating device 2 to work, and meanwhile, the piston body 52 can press the sealing ring 53 downwards to deform the sealing ring 53; when the spray head 3 is released, the piston body 52 can automatically float upwards to realize homing under the action of the elastic force of the second trigger device 4 and the sealing ring 53, so that the piston body 52 is separated from the second trigger device 4.

Preferably, the inner wall of the guide ring 55 is provided with a guide groove 551, and the abutting end of the abutting rod 34 is located in the guide ring 55. According to the utility model, the propping top end of the propping rod 34 stretches into the guide ring 55, so that when the spray head 3 is pressed each time, the spray head 3 can drive the propping rod 34 to accurately prop against the movable assembly 5; meanwhile, the inner wall of the guide ring 55 is provided with the guide groove 551, so that the foam conveyed to the liquid passing cavity 62 can enter the upper portion of the sealing piece 54 through the guide groove 551, and when the pushing rod 34 is not contacted with the sealing piece 54, the foam in the liquid passing cavity 62 can flow into the second channel 32 through the guide groove 551 and output the foam through the second channel 32. Preferably, in order to make the foam flow into the second channel 32 through the guide grooves 551 better, the inner wall of the guide ring 55 is provided with a plurality of guide grooves 551 along the vertical direction.

Preferably, the inner wall of the guide ring 55 is provided with at least two guide grooves 552, and the outer wall of the pushing rod 34 has guide blocks 341 slidably fitted with the guide grooves 552. According to the utility model, the guide grooves 552 are arranged on the inner wall of the guide ring 55, and the guide sliding blocks 341 are arranged on the outer wall of the pushing rod 34, so that after the guide sliding blocks 341 and the guide grooves 552 are assembled together in a sliding manner, the pushing rod 34 and the spray head 3 can move, the spray head 3 can be limited by the cooperation of the guide sliding blocks 341 and the guide grooves 552, and the spray head 3 can only move up and down and cannot rotate, so that once the spray head 3 is aligned to a required position, foam can be accurately sprayed to the required position, and the problem that the spray head 3 cannot be accurately sprayed to the required position due to rotation of the spray head is avoided.

As a specific embodiment of the housing 6 of the present utility model, please refer to fig. 4-6, 9, 12 and 13, the housing 6 includes:

a screw cap 63, the screw cap 63 is provided with a movable channel 631 penetrating, the nozzle 3 is provided with a movable column 35 movably arranged in the movable channel 631, so that the whole nozzle 3 can move up and down relative to the screw cap 63;

a base 64, wherein the base 64 is detachably connected with the lower end of the screw cap 63, and the movable assembly 5 is arranged on the base 64, namely, a piston assembling cavity 621 is arranged on the top of the base 64; by designing the lower ends of the base 64 and the screw cap 63 to be detachably connected, the movable assembly 5 and other parts can be conveniently installed in the whole shell 6, and the parts arranged in the shell 6 can be conveniently cleaned, replaced and the like when needed; specifically, two rotating grooves 632 are symmetrically arranged on the inner wall of the lower end of the screw cap 63, a sliding opening 633 is formed at one end of each rotating groove 632, and a rotating slide block 641 is fixedly arranged on the outer wall of the base 64 corresponding to each rotating groove 632, so that when the screw cap 63 and the base 64 are required to be assembled together, the screw cap 63 and the base 64 can be assembled together only by pressing the rotating slide block 641 of the base 64 into the sliding opening 633 and rotating the screw cap 63; when the screw cap 63 is required to be detached from the base 64, the screw cap 63 can be separated from the base 64 only by rotating the screw cap 63 to slide the rotating slide block 641 to the sliding opening 633, so that the whole operation is very convenient;

the bottom of the movable column 35 is provided with a mounting part 36 in a downward extending manner, the upper end of the sealing cover 65 is connected with the mounting part 36, the lower end of the sealing cover 65 is tightly attached to the outer edge of the base 64 to realize a sealing effect, and the liquid passing cavity 62 is formed in the sealing cover 65; the pushing rod 34 is arranged at the bottom of the mounting part 36; wherein, the seal cover 65 can be a rubber seal cover, and the seal cover 65 can play a role in sealing, so that the foam conveyed into the liquid passing cavity 62 cannot seep out of the liquid passing cavity 62; meanwhile, the sealing cover 65 can also play a role in resetting the spray head 3, namely when the spray head 3 is pressed, the mounting part 36 of the spray head 3 can press down the upper end of the sealing cover 65 to deform the sealing cover 65, and when the spray head 3 is loosened, the sealing cover 65 can be restored to the original state under the action of elasticity and drives the spray head 3 to reset upwards;

a flat pad 66, wherein the flat pad 66 is sleeved outside the seal cover 65; specifically, in order to achieve a better sealing effect, the outer edge of the lower end of the sealing cover 65 extends outwards to form a bonding sheet 652, the bonding sheet 652 is tightly attached to the top surface of the base 64, and the flat pad 66 is located above the bonding sheet 652; because the spiral cover 63 and the base 64 are detachably connected, the spiral cover 63 needs to be rotated to realize the dismounting function in the using process, the flat pad 66 is arranged above the bonding sheet 652 of the sealing cover 65, so that the bonding sheet 652 can be pressed downwards by the flat pad 66 in use, a better sealing effect is realized, and meanwhile, the flat pad 66 can be arranged to avoid the spiral cover 63 from being in friction contact with the sealing cover 65 in rotation, so that the sealing cover 65 is prevented from being distorted and damaged due to contact friction.

Preferably, a limiting plate 361 is fixed at the upper end of the mounting portion 36, a blocking plate 362 is fixed at the lower end of the mounting portion 36, and an annular groove 363 is formed between the limiting plate 361 and the blocking plate 362; a sleeve hole 651 is formed through the top of the seal cover 65, and the upper end of the seal cover 65 is sleeved in the annular groove 363 through the sleeve hole 651. The size of the limiting plate 361 is larger than that of the movable channel 631, so that the limiting plate 361 can be matched with the baffle plate 362 to form an annular groove 363, and can also limit the spray head 3, so that the spray head 3 cannot be pulled out through the movable channel 631; the stop piece 362 can play a limiting and blocking role on the upper end of the seal cover 65, and in a specific design, the inner diameter of the sleeve hole 651 at the top of the seal cover 65 can be designed to be smaller than the outer diameter of the mounting portion 36, so that after the sleeve hole 651 is sleeved in the annular groove 363, the mounting portion 36 can be tightly attached to the top of the seal cover 65 to realize sealing, and the stop piece 362 can prevent the upper end of the seal cover 65 from being separated from the mounting portion 36.

In a preferred embodiment of the utility model, the method further comprises: in the process of outputting foam through the first channel 31 of the spray head 3, if a first trigger signal generated by the first trigger device 1 is received, the first trigger device 1 is controlled to enter a shielding state, and in the shielding state, the first trigger signal loses control effect on the foam generating device 2. Since in the second output mode, the foam can be output in a forward spraying mode, when the foam machine is used, the foam machine is usually required to be held on the hand, and the spray head 3 is pressed to spray the foam, the false triggering condition of the first triggering device 1 is easily caused in the actual operation process; when foam is output through the first channel 31 of the spray head 3, if the first trigger device 1 generates a first trigger signal, the first trigger device 1 is controlled to enter a shielding state, so that the first trigger signal loses control action on the foam generating device 2, and the first trigger device 1 is prevented from being triggered by mistake.

More specifically, after controlling the first triggering device 1 to enter the shielding state, in order to restore the first triggering signal generated by the first triggering device 1, the method further includes: receiving a third trigger signal generated by the first trigger device 1, and controlling the first trigger device 1 to exit a shielding state based on the third trigger signal; the conditions of the first trigger signal and the third trigger signal are different, for example, the first trigger signal may be generated when the first trigger device 1 senses that the hand approaches; the third trigger signal may be generated when the first trigger device 1 senses that the hand approaches and then leaves, and then senses that the hand approaches after a predetermined time (e.g. 2 seconds) has elapsed.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the utility model, and that equivalent modifications and variations of the utility model in light of the spirit of the utility model will be covered by the claims of the present utility model.

Claims (8)

1. A foam output method, characterized by: the method includes a first output mode and a second output mode;

in the first output mode, a first trigger signal generated by a first trigger device is received, the foam generating device is controlled to convey foam to the spray head based on the first trigger signal, and the foam is jointly output through a first channel and a second channel of the spray head;

in the second output mode, receiving a second trigger signal generated by a second trigger device, and controlling the foam generating device to convey foam to the spray head based on the second trigger signal, wherein the foam is output through a first channel of the spray head; the second trigger signal is generated by triggering the second trigger device when the spray head is operated to block the second channel.

2. A foam discharging method as claimed in claim 1, wherein: the channel sectional area of the first channel is smaller than that of the second channel; in the first output mode, the foam is jointly output in a flow manner through a first channel and a second channel; in the second output mode, the foam is output through the first channel in a spray manner.

3. A foam discharging method as claimed in claim 1, wherein: the bottom of the spray head is provided with a pushing rod, and the input end of the first channel is positioned at the bottom of the pushing rod; a movable assembly is arranged below the pushing rod, and the second trigger device is arranged below the pushing rod;

when the spray head is pressed, the bottom surface of the pushing rod is in contact with the top surface of the movable assembly to block the second channel, and meanwhile, the pushing rod pushes the movable assembly to move, so that the movable assembly pushes the second trigger device to generate a second trigger signal; when the spray head is loosened, the movable assembly is reset upwards and is separated from contact with the second trigger device, and the spray head is reset upwards and is separated from contact with the movable assembly.

4. A foam discharging method as claimed in claim 1, wherein: the outer wall of the spray head is provided with a liquid outlet, the output ends of the first channel and the second channel are both communicated with the liquid outlet, and the cross section of the output end of the first channel is circular.

5. A foam discharging method according to any one of claims 1 to 4, wherein: the method further comprises the steps of: in the process of outputting foam through the first channel of the spray head, if a first trigger signal generated by the first trigger device is received, the first trigger device is controlled to enter a shielding state, and in the shielding state, the first trigger signal loses control effect on the foam generating device.

6. A foam discharging method as claimed in claim 5, wherein: the method further comprises the steps of: receiving a third trigger signal generated by the first trigger device, and controlling the first trigger device to exit from a shielding state based on the third trigger signal; the first trigger signal and the third trigger signal are generated under different conditions.

7. A foam discharging method as claimed in claim 1, wherein: the first triggering device is an inductive switch.

8. A foam discharging method as claimed in claim 1, wherein: the second triggering device is a key switch.

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