Medicinal bacteria-blocking spraying device

Abstract

The utility model provides a medicinal bacteria-blocking spraying device which comprises a bottle body and a spraying pump assembly, the spraying pump assembly comprises a pressing buckle cover, a pump base, a spraying head, a piston assembly and a one-way valve assembly, and the piston assembly comprises a main piston, a first auxiliary piston and a second auxiliary piston; the main piston is fixedly arranged in the spray head and is provided with a piston main body and a piston liquid outlet hole; the first auxiliary piston is of a cylinder structure and is fixedly arranged on the periphery of the piston body in a sealed mode. The second auxiliary piston is hermetically and fixedly arranged at the lower end of the piston main body and / or the first auxiliary piston; the pump base is provided with a base cylinder part and a base core column, the base cylinder part, the base core column, the first auxiliary piston and the second auxiliary piston define a sealing cavity, the pump base is provided with an exhaust protruding part at the bottom of the sealing cavity, and an exhaust groove is formed in the exhaust protruding part. According to the spray pump assembly, the piston assembly is provided with the three pistons, so that the structures of all the pistons are simplified, the structure for producing an injection mold is simpler, deformation is smaller during product production, and the product quality of all the pistons is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medicinal nasal spray drug delivery, in particular to a medicinal bacteria-blocking spray device. Background Art

[0002] Currently, drug delivery devices for nasal administration are generally of a spray pump structure, where the drug solution is sucked into the internal channel of the spray pump by pressing the spray head, and is finally sprayed out from the nozzle at the upper end of the spray pump.

[0003] In the prior art, the spray pump has a normally closed nozzle structure, which is equipped with a sub-column that can move up and down and a spring acting on the sub-column at the nozzle. The sub-column and the spring cooperate to act as a one-way valve; for example, the Chinese utility model patent with application number 202322795129.3 discloses a medicinal antibacterial nasal spray applicator. When the spray pump is not in use, the sub-column fits tightly against the nozzle under the action of the spring, preventing the internal liquid medicine from flowing out and preventing external air from entering. When the spray pump is in use, after pressing the nozzle, the liquid medicine is sucked into the internal channel of the spray pump and acts on the sub-column. Under the action of the liquid pressure, the sub-column moves away from the nozzle, allowing the liquid medicine to be sprayed out through the nozzle; after a spray is completed, the liquid pressure disappears, and the sub-column is reset under the action of the spring, quickly closing the nozzle.

[0004] The piston structure of the above-mentioned spray pump includes two pistons: a main piston fixed in the spray head and capable of moving up and down with the spray head, and a secondary piston fixed on the pump body. However, the structure of the main piston involved in this structure is relatively complex, comprising a piston body, a piston inner sleeve arranged on the inner circumference of the piston body, a piston core arranged on the inner circumference of the piston inner sleeve, and a piston liquid outlet groove provided in the piston inner sleeve. The piston body is arranged relatively long, and its lower end needs to extend into the pump body, while the lower end of the piston core extends into the secondary piston. In addition, in order to ensure sealing performance, sealing flanges need to be provided at the lower end of the piston core of the main piston and the upper end of the outer circumference of the secondary piston. Ultimately, the structure of the main piston or the secondary piston is relatively complex. Since the main piston or the secondary piston is an injection molded product, the structure of the injection mold used to produce the main piston or the secondary piston is relatively complex, and the product is prone to large deformation during production, and the performance of the piston structure cannot be reliably guaranteed. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a medicinal antibacterial spray device, simplify the structure of each piston in the piston structure, and further simplify the structure of the injection mold used to produce each piston, thereby ensuring the product quality of each piston.

[0006] To achieve the above-mentioned purpose, the utility model provides a medicinal antibacterial spray device, comprising a bottle body and a spray pump assembly, wherein the spray pump assembly comprises a snap-on cover mounted on the upper end of the bottle body, a pump base fixed in the snap-on cover, a nozzle mounted on the pump base movably up and down, a piston assembly fixed in the nozzle, and a one-way valve assembly, wherein a nozzle is provided on the top of the nozzle, and the piston assembly comprises a main piston, a first sub-piston and a second sub-piston; the main piston comprises a piston fixing portion sealed and fixed in the nozzle, a piston main body fixed on the inner circumference of the piston fixing portion, a piston body connected to the piston a piston connecting portion between the fixed portion and the piston body, and a piston liquid outlet hole provided on the piston connecting portion; the first secondary piston is a cylindrical structure and is sealed and fixedly arranged on the outer periphery of the piston body, and an upper liquid outlet channel is provided between the first secondary piston and the piston body; the second secondary piston is sealed and fixedly arranged at the lower end of the piston body and / or the first secondary piston, and a lower liquid outlet channel is provided between the first secondary piston and the second secondary piston; the one-way valve assembly is provided between the main piston and the nozzle of the spray head, and the lower liquid outlet channel, the upper liquid outlet channel, the piston liquid outlet hole and the one-way valve assembly are connected in sequence;

[0007] The pump base is provided with a base cylinder that is slidably and sealingly fitted on the outer periphery of the first secondary piston, and a base core column that is slidably and sealingly fitted on the inner periphery of the second secondary piston. An exhaust and liquid suction cavity communicating with the inner cavity of the bottle body is provided in the base core column. A sealed chamber is formed between the base cylinder, the base core column, the first secondary piston and the second secondary piston. The sealed chamber is communicated with the lower side of the lower liquid outlet channel. The pump base is provided with an exhaust protrusion at the bottom of the sealed chamber, and an exhaust groove is provided on the exhaust protrusion.

[0008] When the nozzle is not pressed downward, the second secondary piston is separated from the base core column;

[0009] When the nozzle is pressed downward but not to the bottom, the second secondary piston and the base core column are slidingly sealed, the second secondary piston is located above the exhaust protrusion, and the sealed chamber is not connected to the exhaust and liquid suction chamber;

[0010] When the nozzle is pressed downward to the bottom, the second auxiliary piston contacts and cooperates with the exhaust protrusion, and the sealed chamber is communicated with the exhaust and liquid suction chamber through the exhaust groove.

[0011] Furthermore, the second secondary piston includes a piston core column and a piston cylinder portion fixed at the lower end of the piston core column. The piston core column is sealed and fixed in the lower end of the piston body. The piston cylinder portion is sealed and fixed in the lower end of the second secondary piston. The lower liquid outlet channel is formed between the piston cylinder portion and the second secondary piston.

[0012] Furthermore, the main piston, the first auxiliary piston and the second auxiliary piston are all injection-molded parts.

[0013] Furthermore, the upper liquid outlet channel is at least one groove formed on the outer peripheral surface of the piston body, and the lower liquid outlet channel is at least one groove formed on the outer peripheral surface of the piston cylinder.

[0014] Furthermore, the lower end of the first secondary piston is provided with a first sealing lip, which is in sliding and sealing cooperation with the inner circumference of the base cylinder; the second secondary piston is provided with a second sealing lip at the lower end of the piston cylinder, which is capable of sliding and sealing cooperation with the outer circumference of the base core column.

[0015] Furthermore, the first sealing flange is tilted outward and downward, the second sealing flange is tilted inward and downward, and the pump base is provided with a circle of base partitions at the bottom of the sealed chamber, and the base partitions are distributed on the outer peripheral side of the exhaust protrusion;

[0016] When the nozzle is pressed downward to the bottom, the base partition is inserted between the first sealing flange and the second sealing flange.

[0017] Furthermore, the lower end of the inner circumference of the second sealing flange is provided with a first guide surface extending obliquely outward and downward, and the upper end of the base core column is provided with a second guide surface extending obliquely outward and downward, and the first guide surface can contact the second guide surface.

[0018] Furthermore, the one-way valve assembly includes a main column fixed in the top of the spray head, a sub-column movably assembled between the main column and the main piston, and a first return spring. The main column is provided with a valve liquid outlet hole and a valve liquid outlet groove. A valve liquid outlet channel is formed between the outer circumferential surface of the sub-column and the inner circumferential surface of the spray head. The piston liquid outlet hole, the valve liquid outlet channel, the valve liquid outlet hole and the valve liquid outlet groove are connected in sequence. The sub-column has a sealing column portion slidably inserted in the main column. The upper and lower ends of the first return spring are respectively in contact with the sub-column and the main piston.

[0019] When the liquid pressure in the valve liquid outlet channel is less than the spring force of the first return spring, the secondary column is in an upward moving state, and the sealing column portion of the secondary column blocks the nozzle;

[0020] When the liquid pressure in the valve liquid outlet channel is greater than the spring force of the first return spring, the auxiliary column moves downward, the sealing column portion of the auxiliary column moves away from the nozzle, and the valve liquid outlet groove is connected to the nozzle.

[0021] Furthermore, the spray pump assembly further includes a pressing cover fixed to the outer periphery of the spray head, an air return gap formed between the pressing cover and the snap cover, an air return groove provided on the outer periphery of the lower end of the spray head, an air return hole provided in the pump base, an air return channel formed in the pump base, and a filter assembly, wherein the air return gap, the air return groove, the air return hole, the air return channel, and the inner cavity of the bottle body are sequentially connected;

[0022] The filter assembly includes a filter membrane sleeve tightly fixed in the return air channel, a filter membrane plug tightly fixed in the filter membrane sleeve, and a bacteria-blocking filter membrane. The inner circumferential surface of the filter membrane sleeve is provided with an inwardly protruding fixed step, and the outer edge of the bacteria-blocking filter membrane is clamped between the fixed step and the filter membrane plug.

[0023] Furthermore, the spray pump assembly also includes a second return spring, which is sleeved on the base cylinder and the outer circumference of the first secondary piston, and the upper and lower ends of the second return spring respectively abut against the inner circumference of the spray head and the pump base.

[0024] As described above, the medicinal antibacterial spray device of the present invention has the following beneficial effects:

[0025] The present application provides a piston assembly in a spray pump assembly with three pistons: a main piston, a first auxiliary piston, and a second auxiliary piston. The main piston does not need to cooperate with the pump base in a sliding seal. Instead, the first and second auxiliary pistons cooperate with the pump base to achieve the suction of the liquid medicine after the spray head is pressed, so the piston fixing portion of the main piston can be shortened; at the same time, the second auxiliary piston is assembled at the lower end of the main piston and / or the first auxiliary piston, which can simplify the second auxiliary piston. Combined with the first auxiliary piston with a cylindrical structure, the structures of the main piston, the first auxiliary piston, and the second auxiliary piston are relatively streamlined, ultimately making the structures of the injection molds for producing the main piston, the first auxiliary piston, and the second auxiliary piston simpler, with less deformation during product production, and effectively ensuring the product quality of each piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the medicinal antibacterial spray device of this application.

[0027] Figure 2 for Figure 1 Top view of .

[0028] Figure 3 for Figure 2 AA section view.

[0029] Figure 4 for Figure 2 BB cross-sectional view.

[0030] Figure 5 Schematic diagram of the structure of the nozzle in this application.

[0031] Figure 6 and Figure 7 Schematic diagram of the structure of the main piston in this application at different viewing angles.

[0032] Figure 8 This is a schematic structural diagram of the second secondary piston in this application.

[0033] Figure 9 This is a top view of the pump base in this application.

[0034] Figure 10 for Figure 9 CC section view.

[0035] Figure 11 This is a structural diagram of the main column in this application.

[0036] Figure 12 This is a diagram of the state of the medicinal antibacterial spray device of this application when the nozzle is pressed down but not to the bottom.

[0037] Figure 13 This is a diagram of the state of the medicinal antibacterial spray device of this application when the nozzle is pressed down to the bottom.

[0038] Component number description

[0039] 10 Bottle

[0040] 20 snap cover

[0041] 30 Pump base

[0042] 31 Base tube

[0043] 32 base core

[0044] 33 Exhaust and suction chamber

[0045] 34 Sealed Chamber

[0046] 35 Exhaust protrusion

[0047] 36 exhaust slots

[0048] 37 Base divider

[0049] 38 Second guide surface

[0050] 39 air return hole

[0051] 310 return air channel

[0052] 40 nozzles

[0053] 41 Nozzle

[0054] 42 air return tank

[0055] 50 Main piston

[0056] 51 Piston fixing part

[0057] 52 piston body

[0058] 53 Piston connection

[0059] 54 Piston fluid outlet

[0060] 60 First piston

[0061] 61 First sealing flange

[0062] 70 Second piston

[0063] 71 piston core

[0064] 72 piston cylinder

[0065] 73 Second sealing flange

[0066] 74 first guide surface

[0067] 81 upper liquid outlet channel

[0068] 82 lower liquid outlet channel

[0069] 90 Main Column

[0070] 91 Valve outlet

[0071] 92 Valve outlet tank

[0072] 110 Auxiliary pillar

[0073] 111 Sealing column

[0074] 120 First return spring

[0075] 130 Valve outlet channel

[0076] 140 Press cover

[0077] 151 filter membrane sleeve

[0078] 152 filter membrane plug

[0079] 153 Bacteria-blocking Filter Membrane

[0080] 160 Second return spring

[0081] 170 straws

[0082] 180 dust cover

[0083] 190 Silicone Gasket DETAILED DESCRIPTION

[0084] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0085] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology, and are not used to limit the conditions for the implementation of this utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0086] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0087] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0088] like Figure 1 and Figure 2 As shown, the present application relates to a medicinal antibacterial spray device, which is used to atomize liquid medicine and then administer it to the nasal cavity, and the medicine can reach the respiratory tract and lungs.

[0089] like Figure 1 and Figure 2 As shown, the medicinal antibacterial spray device involved in this application includes a bottle body 10 and a spray pump assembly. The bottle body 10 contains liquid medicine, and the spray pump assembly is installed at the opening at the upper end of the bottle body 10. Figure 3 and Figure 4As shown, the spray pump assembly includes a snap-on cover 20, a pump base 30, a spray head 40, a piston assembly and a one-way valve assembly; wherein the bottle body 10 is a snap-on bottle, and the snap-on cover 20 is snap-fitted and installed on the upper end of the bottle body 10, thereby installing the spray pump assembly as a whole on the upper end of the bottle body 10; the pump base 30 is fixed in the snap-on cover 20; the spray head 40 is mounted on the pump base 30 so as to be movable up and down, and a nozzle 41 is provided on the top of the spray head 40 for atomizing and spraying the liquid medicine; the piston assembly is fixed in the spray head 40 and can move up or down with the spray head 40; the one-way valve assembly is assembled between the top of the spray head 40 and the upper end of the piston assembly. The one-way valve assembly acts on the nozzle 41, making the nozzle 41 a normally closed structure, allowing the liquid medicine to be sprayed from the nozzle 41 when the medicine is being administered, and closing the nozzle 41 when the medicine is not being administered. External air cannot enter the spray pump assembly through the nozzle 41, thereby playing a role in preventing bacteria and preventing the liquid medicine in the bottle body 10 from deteriorating.

[0090] In particular, if Figure 3 and Figure 4 As shown, the piston assembly includes a primary piston 50, a first secondary piston 60 and a second secondary piston 70. Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the main piston 50 includes a piston fixing portion 51 sealed and fixed in the spray head 40, a piston body 52 fixed to the inner circumference of the piston fixing portion 51, a piston connecting portion 53 connected between the upper end of the piston fixing portion 51 and the piston body 52, and at least one piston liquid outlet 54 opened on the piston connecting portion 53. A one-way valve assembly is provided between the top of the main piston 50 and the nozzle 41 of the spray head 40. Figure 3 and Figure 4 As shown, the first auxiliary piston 60 is a cylindrical structure and is sealed and fixed on the outer periphery of the piston body 52. ​​An upper liquid outlet channel 81 is opened between the first auxiliary piston 60 and the piston body 52. Figure 3 、 Figure 4 and Figure 8 As shown, the second auxiliary piston 70 is sealed and fixed to the lower end of the piston body 52 and / or the first auxiliary piston 60. A lower liquid outlet channel 82 is defined between the first auxiliary piston 60 and the second auxiliary piston 70. The lower liquid outlet channel 82, the upper liquid outlet channel 81, the piston liquid outlet hole 54, and the one-way valve assembly are sequentially connected.

[0091] Further, if Figure 3 、 Figure 4 、 Figure 9 and Figure 10As shown, the pump base 30 is provided with a base cylinder 31 and a base core column 32 both extending up and down, and an exhaust and liquid suction cavity 33 communicating with the inner cavity of the bottle body 10 is provided in the base core column 32; the base cylinder 31 is slidingly sealed and fitted on the outer periphery of the first secondary piston 60, forming a seal between the two; at the same time, in the process of pressing the nozzle 40, the base core column 32 can be slidingly sealed and fitted on the inner periphery of the second secondary piston 70; a sealed chamber 34 is formed between the base cylinder 31, the base core column 32, the first secondary piston 60 and the second secondary piston 70, and the sealed chamber 34 is an annular chamber, which is directly connected to the lower side of the lower liquid outlet channel 82; the pump base 30 is provided with an exhaust protrusion 35 at the bottom of the sealed chamber 34, and an exhaust groove 36 is provided on the exhaust protrusion 35.

[0092] When the medicinal antibacterial spray device is not in use, it is in the initial state of the medicinal antibacterial spray device. Figure 3 As shown, the spray head 40 is not pressed downward. The spray head 40, primary piston 50, first secondary piston 60, and second secondary piston 70 are all at the upper limit of their respective travels. The lower end of the second secondary piston 70 is separated from the base stem 32, forming a gap therebetween. Simultaneously, the internal passageway of the spray pump assembly is empty of liquid, and the one-way valve assembly closes the nozzle 41.

[0093] When the medicinal antibacterial spray device is used for medication, the user presses down the nozzle 40. During this process, the nozzle 40 moves downward, driving the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 to move downward together. As the nozzle 40, the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 move downward, first, as Figure 12 As shown, the second secondary piston 70 begins to contact the outer peripheral surface of the base core column 32, and the two slide and seal together. However, the second secondary piston 70 is distributed on the upper side of the exhaust protrusion 35 and has not reached the exhaust protrusion 35. Then, through the sliding sealing cooperation between the second secondary piston 70 and the base core column 32, and the sliding sealing cooperation between the first secondary piston 60 and the base cylinder 31, sealing begins to form a closed sealed chamber 34. The sealed chamber 34 is not connected to the exhaust and liquid suction chamber 33, and the two are sealed by the second secondary piston 70 and the base core column 32. Afterwards, as the nozzle 40 continues to be pressed, the nozzle 40 drives the main piston 50, the first secondary piston 60 and the second secondary piston 70 to continue to move downward, the volume of the sealed chamber 34 gradually decreases, and the gas in the sealed chamber 34 is gradually compressed. Later, when the nozzle 40 is pressed down to the bottom, that is, at least one of the nozzle 40, the first secondary piston 60 or the second secondary piston 70 is limited by the pump base 30, at this time, as shown Figure 13As shown, the second secondary piston 70 contacts and cooperates with the exhaust protrusion 35, and the exhaust protrusion 35 is provided with an exhaust groove 36. The exhaust groove 36 destroys the seal, and the sealed chamber 34 is connected with the exhaust liquid suction chamber 33 through the exhaust groove 36. The gas in the sealed chamber 34 is depressurized, and the gas in the sealed chamber 34 is discharged into the bottle body 10 through the exhaust groove 36, the gap between the second secondary piston 70 and the outer periphery of the base core column 32, and the exhaust liquid suction chamber 33, generating bubbles in the bottle body 10. Finally, the user releases the pressure on the nozzle 40, causing the nozzle 40 to move upward, driving the main piston 50, the first auxiliary piston 60, and the second auxiliary piston 70 to move downward. When the second auxiliary piston 70 leaves the exhaust protrusion 35, it re-seals with the base core column 32, thus re-forming a sealed chamber 34. As the nozzle 40, the main piston 50, the first auxiliary piston 60, and the second auxiliary piston 70 move upward, the volume of the sealed chamber 34 gradually increases, generating a negative pressure. Under the action of the negative pressure, the liquid in the bottle 10 is sucked out. Finally, when the second auxiliary piston 70 is separated from the base core column 32, the sucked liquid flows into the sealed chamber 34. After repeatedly pressing and releasing the nozzle 40, the sealed chamber 34 is filled with liquid medicine. When the nozzle 40 is pressed next time, since the liquid medicine in the sealed chamber 34 cannot be compressed, the liquid medicine in the sealed chamber 34 flows into the lower liquid outlet channel 82, the upper liquid outlet channel 81, the piston liquid outlet hole 54 and the one-way valve assembly in sequence as the volume of the sealed chamber 34 decreases. The one-way valve assembly is opened under the action of the liquid pressure of the liquid medicine, and the liquid medicine is sprayed out in a mist form through the nozzle 41 to administer the medicine.

[0094] After a dose of the medicinal antibacterial spray device is completed, the liquid pressure in the spray pump assembly disappears, and the one-way valve assembly re-closes the nozzle 41, isolating the inside and outside of the nozzle 41 again, preventing the internal drug liquid from deteriorating due to contact with the external air and the internal drug liquid from deteriorating due to pollution from the external environment, thereby ensuring the efficacy of the internal drug liquid.

[0095] The piston assembly in this application comprises three pistons: a primary piston 50, a first secondary piston 60, and a second secondary piston 70. These three components are injection-molded parts, manufactured using injection molding. The primary piston 50, the first secondary piston 60, and the second secondary piston 70 in this application combine to function as the primary piston in conventional antibacterial nasal spray dispensers. The pump base 30 in this application functions as both the secondary piston and the pump body in conventional antibacterial nasal spray dispensers. After such arrangement, in the spray pump assembly involved in the present application, the main piston 50 does not need to cooperate with the pump base 30 in a sliding and sealing manner. Instead, the first auxiliary piston 60 and the second auxiliary piston 70 cooperate with the pump base 30 to achieve the suction of the liquid medicine after the spray head 40 is pressed, so that the piston fixing portion 51 of the main piston 50 can be shortened; at the same time, the second auxiliary piston 70 is assembled at the lower end of the main piston 50 and / or the first auxiliary piston 60, which can simplify the second auxiliary piston 70. Combined with the first auxiliary piston 60 with a cylindrical structure, the structures of the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are relatively streamlined, and ultimately the structures of the various injection molds for producing the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are simpler, the deformation during product production is smaller, and the product quality of each piston is effectively guaranteed.

[0096] Further, if Figure 3 、 Figure 4 and Figure 8 As shown, the second secondary piston 70 includes a piston stem 71 and a piston barrel 72 fixed to the lower end of the piston stem 71. The piston stem 71 is sealed and fixed within the lower end of the piston body 52, and the piston barrel 72 is sealed and fixed within the lower end of the second secondary piston 70. A lower liquid outlet channel 82 is formed between the piston barrel 72 and the second secondary piston 70. Preferably, in the above-mentioned spray pump assembly, the piston fixing portion 51 of the primary piston 50 is tightly fixed within the spray head 40; the first secondary piston 60 is tightly fixed to the primary piston 50, specifically, the first secondary piston 60 is tightly fixed to the inner circumference of the piston fixing portion 51 and the outer circumference of the piston body 52. ​​This ensures that when the first secondary piston 60 and the primary piston 50 are assembled, the force-bearing surface of the first secondary piston 60 is larger and the force is more balanced; the piston stem 71 of the second secondary piston 70 is tightly fixed to the inner circumference of the piston body 52, and the piston barrel 72 of the second secondary piston 70 is tightly fixed to the inner circumference of the first secondary piston 60. While achieving fixation through a tight fit, good sealing performance can be formed between the spray head 40 and the main piston 50, and between the main piston 50 and the second auxiliary piston 70.

[0097] Preferably, the upper liquid outlet channel 81 and the lower liquid outlet channel 82 can be formed by providing a groove on the outer circumference of the piston body 52 and / or the inner circumference of the first auxiliary piston 60 to form the upper liquid outlet channel 81, and providing a groove on the outer circumference of the piston cylinder 72 and / or the inner circumference of the first auxiliary piston 60 to form the lower liquid outlet channel 82. In this embodiment, Figure 3 and Figure 6 As shown, the upper liquid outlet channel 81 has two grooves formed on the outer peripheral surface of the piston body 52. ​​The two grooves constituting the upper liquid outlet channel 81 are distributed at intervals of 180 degrees along the circumference of the piston body 52. Figure 3 and Figure 8 As shown, the lower liquid outlet channel 82 has two grooves formed on the outer circumference of the piston barrel portion 72. The two grooves forming the lower liquid outlet channel 82 are spaced 180 degrees apart along the circumference of the piston barrel portion 72. This arrangement eliminates the need to machine grooves on the inner circumference of the first secondary piston 60. Only grooves are machined on the outer circumferences of the piston barrel portion 72 of the primary piston 50 and the second secondary piston 70, making manufacturing more convenient.

[0098] Further, if Figure 3 and Figure 4 As shown, the lower end of the first secondary piston 60 is provided with a first sealing lip 61, which slides and seals with the inner circumference of the base cylinder 31 to achieve a seal between the first secondary piston 60 and the base cylinder 31. The second secondary piston 70 is provided with a second sealing lip 73 at the lower end of the piston cylinder 72, which slides and seals with the outer circumference of the base core 32 to achieve a seal between the second secondary piston 70 and the base core 32. In addition, the first sealing lip 61 is tilted outward and downward, while the second sealing lip 73 is tilted inward and downward. The pump base 30 is provided with a circle of base partitions 37 at the bottom of the sealed chamber 34. The base partitions 37 are distributed on the outer circumference of the exhaust protrusion 35. When the nozzle 40 is pressed downward to the bottom, the base partition 37 is inserted between the first sealing flange 61 and the second sealing flange 73; at the same time, the lower end of the first sealing flange 61 abuts against the sealing chamber 34, thereby limiting the downward movement of the nozzle 40, the main piston 50, the first secondary piston 60 and the second secondary piston 70, that is, limiting the downward movement distance of the first secondary piston 60 and the second secondary piston 70 when the nozzle 40 is pressed in sequence, thereby achieving the purpose of controlling the dosage.

[0099] Preferably, if Figure 3 and Figure 4As shown, the lower end of the inner circumference of the second sealing flange 73 is provided with a first guide surface 74 extending outward and downward in an inclined manner, and the upper end of the base core column 32 is provided with a second guide surface 38 extending outward and downward in an inclined manner; when the nozzle 40 is pressed downward so that the lower end of the second secondary piston 70 begins to contact the base core column 32, the first guide surface 74 can contact the second guide surface 38. Through the inclined setting of the first guide surface 74 and the second guide surface 38, the second sealing flange 73 can be better guided to expand toward the outer periphery of the base core column 32, so that the second sealing flange 73 is tightly attached to the outer circumferential surface of the base core column 32, and a reliable seal is formed. In addition, when the second sealing flange 73 is tightly attached to the outer circumferential surface of the base core column 32, as shown in FIG. Figure 12 As shown, there is a gap between the piston cylinder portion 72 of the second secondary piston 70 and the base core column 32, that is, the second secondary piston 70 is in contact with the base core column 32 only at the second sealing flange 73 at its lower end, and the first secondary piston 60 is in contact with the base cylinder portion 31 only at the first sealing flange 61 at its lower end. While effectively forming a seal, it can also reduce the contact area, making it easier for the user to press the nozzle 40 downward.

[0100] Further, if Figure 3 and Figure 4 As shown, the one-way valve assembly includes a main column 90 fixed in the top of the nozzle 40, a sub-column 110 movably assembled between the main column 90 and the main piston 50, and a first return spring 120. A valve liquid outlet 91 is provided in the main column 90, and a valve liquid outlet groove 92 is provided on the top of the main column 90. A valve liquid outlet channel 130 is formed between the outer peripheral surface of the sub-column 110 and the inner peripheral surface of the nozzle 40. The piston liquid outlet hole 54, the valve liquid outlet channel 130, the valve liquid outlet hole 91 and the valve liquid outlet groove 92 are connected in sequence. The sub-column 110 has a sealing column portion 111 slidably inserted in the main column 90. The upper and lower ends of the first return spring 120 are respectively abutted against the sub-column 110 and the main piston 50, and the first return spring 120 is preferably accommodated in the groove at the top of the main piston 50. When the liquid pressure in the valve liquid outlet channel 130 is less than the spring force of the first return spring 120, the sub-column 110 is in an upward state, and the sealing column part 111 of the sub-column 110 blocks the nozzle 41; when the liquid pressure in the valve liquid outlet channel 130 is greater than the spring force of the first return spring 120, the sub-column 110 moves downward, the sealing column part 111 of the sub-column 110 moves away from the nozzle 41, and the valve liquid outlet groove 92 is connected to the nozzle 41. In this way, a normally closed nozzle 41 structure is formed. When the liquid medicine enters the periphery of the sub-column 110 by pressing the nozzle 40 several times, the sub-column 110 moves downward under the pressure of the liquid medicine, thereby opening the nozzle 41; when a spray is completed, the sub-column 110 moves upward under the action of the first return spring 120, and quickly closes the nozzle 41. In addition, as Figure 11As shown, the valve liquid outlet groove 92 at the top of the main column 90 is a cyclone groove. When discharging liquid, the liquid flows through the cyclone groove and forms mechanical stirring under the action of pressure, and then is sprayed out in a mist form through the nozzle 41, thereby improving the liquid discharge effect.

[0101] Further, if Figure 3 and Figure 4 As shown, the spray pump assembly also includes a second return spring 160, which is mounted around the base tube 31 and the outer periphery of the first auxiliary piston 60. The upper and lower ends of the second return spring 160 respectively abut the inner circumference of the spray head 40 and the pump base 30. When the spray head 40 is released, the spray head 40 moves upward and resets under the action of the second return spring 160, driving the main piston 50, the first auxiliary piston 60, and the second auxiliary piston 70 to move upward and reset.

[0102] Further, if Figures 3 to 5 As shown, the spray pump assembly further includes a pressing cover 140 fixed to the periphery of the spray head 40 . The pressing cover 140 has a horizontal plate portion for the user to press, so that the user can press the spray head 40 downward by pressing the cover 140 . In addition, the spray pump assembly also includes a return air gap formed between the push cover 140 and the buckle cover 20, a return air groove 42 opened on the outer periphery of the lower end of the nozzle 40, a return air hole 39 opened in the pump base 30, a return air channel 310 formed in the pump base 30, and a filter assembly. The return air gap, the return air groove 42, the return air hole 39, the return air channel 310 and the inner cavity of the bottle body 10 are connected in sequence; the filter assembly includes a filter membrane sleeve 151 tightly fixed in the return air channel 310, a filter membrane plug 152 tightly fixed in the filter membrane sleeve 151, and a bacteria-blocking filter membrane 153. A fixed step protruding inward is provided on the inner circumferential surface of the filter membrane sleeve 151, and the outer edge of the bacteria-blocking filter membrane 153 is clamped between the fixed step and the filter membrane plug 152. After a spray is completed, the liquid in bottle 10 decreases. External air then enters bottle 10 through the return air gap, return air groove 42, return air hole 39, return air channel 310, and bacterial filter 153, preventing negative pressure from forming inside bottle 10 and ensuring normal liquid discharge next time. Bacterial filter 153 filters out bacteria and other impurities in the air, ensuring that the air entering bottle 10 is pure, keeping the air inside bottle 10 dust-free and sterile, and preventing contamination of the liquid in bottle 10.

[0103] Further, if Figure 3 and Figure 4 As shown, the spray pump assembly further includes a suction pipe 170, the upper end of which is fixed in the pump base 30 and extends to the lower end of the exhaust and liquid suction chamber 33. The lower end of the suction pipe 170 is placed at the bottom of the bottle body 10, and the exhaust and liquid suction chamber 33 is connected to the inner cavity of the bottle body 10 through the suction pipe 170. Figure 1 、 Figure 3 and Figure 4As shown, the spray pump assembly also includes a dust cover 180, which can be removably attached to the outer periphery of the spray nozzle 40 to protect the spray nozzle 40 and prevent dust. A silicone gasket 190 is provided between the upper end of the bottle body 10 and the pump base 30 and snap-on cap 20 to provide a seal and prevent liquid leakage.

[0104] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0105] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A medicinal antibacterial spray device, comprising a bottle (10) and a spray pump assembly, wherein the spray pump assembly comprises a snap-on cover (20) mounted on the upper end of the bottle (10), a pump base (30) fixed in the snap-on cover (20), a spray head (40) movably mounted on the pump base (30), a piston assembly fixed in the spray head (40), and a one-way valve assembly, wherein a nozzle (41) is provided at the top of the spray head (40), and wherein: The piston assembly comprises a main piston (50), a first auxiliary piston (60) and a second auxiliary piston (70); the main piston (50) comprises a piston fixing portion (51) sealed and fixed in the nozzle (40), a piston main body (52) fixed on the inner circumference of the piston fixing portion (51), a piston connecting portion (53) connected between the piston fixing portion (51) and the piston main body (52), and a piston liquid outlet hole (54) provided on the piston connecting portion (53); the first auxiliary piston (60) is a cylindrical structure and is sealed and fixed on the outer circumference of the piston main body (52). An upper liquid outlet channel (81) is provided between the first auxiliary piston (60) and the piston body (52); the second auxiliary piston (70) is sealed and fixed to the lower end of the piston body (52) and / or the first auxiliary piston (60); a lower liquid outlet channel (82) is provided between the first auxiliary piston (60) and the second auxiliary piston (70); the one-way valve assembly is provided between the main piston (50) and the nozzle (41) of the spray head (40); the lower liquid outlet channel (82), the upper liquid outlet channel (81), the piston liquid outlet hole (54) and the one-way valve assembly are connected in sequence; The pump base (30) is provided with a base cylinder (31) that is slidably sealed and fitted on the outer periphery of the first auxiliary piston (60), and a base core column (32) that is slidably sealed and fitted on the inner periphery of the second auxiliary piston (70). An exhaust and liquid suction cavity (33) communicating with the inner cavity of the bottle body (10) is provided in the base core column (32). A sealed chamber (34) is formed between the base cylinder (31), the base core column (32), the first auxiliary piston (60) and the second auxiliary piston (70). The sealed chamber (34) is communicated with the lower side of the lower liquid outlet channel (82). The pump base (30) is provided with an exhaust protrusion (35) at the bottom of the sealed chamber (34), and an exhaust groove (36) is provided on the exhaust protrusion (35). When the spray head (40) is not pressed downward, the second auxiliary piston (70) is separated from the base core column (32); When the nozzle (40) is pressed downward but not to the bottom, the second auxiliary piston (70) and the base core column (32) are slidably sealed, the second auxiliary piston (70) is located above the exhaust protrusion (35), and the sealed chamber (34) is not connected to the exhaust and liquid suction chamber (33); When the nozzle (40) is pressed downward to the bottom, the second auxiliary piston (70) contacts and cooperates with the exhaust protrusion (35), and the sealed chamber (34) is communicated with the exhaust liquid suction chamber (33) through the exhaust groove (36).

2. The medicinal antibacterial spray device according to claim 1, characterized in that: The second secondary piston (70) includes a piston core column (71) and a piston cylinder portion (72) fixed at the lower end of the piston core column (71). The piston core column (71) is sealed and fixed in the lower end of the piston body (52). The piston cylinder portion (72) is sealed and fixed in the lower end of the second secondary piston (70). The lower liquid outlet channel (82) is formed between the piston cylinder portion (72) and the second secondary piston (70).

3. The medicinal antibacterial spray device according to claim 1 or 2, characterized in that: The main piston (50), the first auxiliary piston (60) and the second auxiliary piston (70) are all injection-molded parts.

4. The medicinal antibacterial spray device according to claim 2, characterized in that: The upper liquid outlet channel (81) is at least one groove formed on the outer peripheral surface of the piston body (52), and the lower liquid outlet channel (82) is at least one groove formed on the outer peripheral surface of the piston cylinder (72).

5. The medicinal antibacterial spray device according to claim 2, characterized in that: The lower end of the first auxiliary piston (60) is provided with a first sealing lip (61), and the first sealing lip (61) is in sliding and sealing cooperation with the inner peripheral surface of the base cylinder (31); the second auxiliary piston (70) is provided with a second sealing lip (73) at the lower end of the piston cylinder (72), and the second sealing lip (73) can be in sliding and sealing cooperation with the outer peripheral surface of the base core column (32).

6. The medicinal antibacterial spray device according to claim 5, characterized in that: The first sealing flange (61) is tilted outward and downward, and the second sealing flange (73) is tilted inward and downward. The pump base (30) is provided with a circle of base partitions (37) at the bottom of the sealing chamber (34), and the base partitions (37) are distributed on the outer peripheral side of the exhaust protrusion (35); When the nozzle (40) is pressed downward to the bottom, the base partition (37) is inserted between the first sealing lip (61) and the second sealing lip (73).

7. The medicinal antibacterial spray device according to claim 6, characterized in that: The lower end of the inner circumference of the second sealing flange (73) is provided with a first guide surface (74) extending outward and downward in an inclined manner, and the upper end of the base core column (32) is provided with a second guide surface (38) extending outward and downward in an inclined manner, and the first guide surface (74) can contact the second guide surface (38).

8. The medicinal antibacterial spray device according to claim 1, characterized in that: The one-way valve assembly includes a main column (90) fixed in the top of the spray head (40), a sub-column (110) movably assembled between the main column (90) and the main piston (50), and a first return spring (120); the main column (90) is provided with a valve liquid outlet hole (91) and a valve liquid outlet groove (92); a valve liquid outlet channel (130) is formed between the outer peripheral surface of the sub-column (110) and the inner peripheral surface of the spray head (40); the piston liquid outlet hole (54), the valve liquid outlet channel (130), the valve liquid outlet hole (91) and the valve liquid outlet groove (92) are connected in sequence; the sub-column (110) has a sealing column portion (111) slidably inserted in the main column (90); the upper and lower ends of the first return spring (120) are respectively in contact with the sub-column (110) and the main piston (50); When the liquid pressure in the valve liquid outlet channel (130) is less than the spring force of the first return spring (120), the secondary column (110) is in an upward movement state, and the sealing column portion (111) of the secondary column (110) blocks the nozzle (41); When the liquid pressure in the valve liquid outlet channel (130) is greater than the spring force of the first return spring (120), the secondary column (110) moves downward, the sealing column portion (111) of the secondary column (110) moves away from the nozzle (41), and the valve liquid outlet groove (92) is connected to the nozzle (41).

9. The medicinal antibacterial spray device according to claim 1, characterized in that: The spray pump assembly further comprises a pressing cover (140) fixed on the periphery of the spray head (40), an air return gap formed between the pressing cover (140) and the buckle cover (20), an air return groove (42) provided on the periphery of the lower end of the spray head (40), an air return hole (39) provided in the pump base (30), an air return channel (310) formed in the pump base (30), and a filter assembly, wherein the air return gap, the air return groove (42), the air return hole (39), the air return channel (310) and the inner cavity of the bottle body (10) are sequentially connected; The filter assembly comprises a filter membrane sleeve (151) tightly fixed in the return air channel (310), a filter membrane plug (152) tightly fixed in the filter membrane sleeve (151), and a bacteria-blocking filter membrane (153). An inwardly protruding fixed step is provided on the inner peripheral surface of the filter membrane sleeve (151), and the outer edge of the bacteria-blocking filter membrane (153) is clamped between the fixed step and the filter membrane plug (152).

10. The medicinal antibacterial spray device according to claim 1, characterized in that: The spray pump assembly further comprises a second return spring (160), which is sleeved on the outer periphery of the base cylinder (31) and the first secondary piston (60), and the upper and lower ends of the second return spring (160) respectively abut against the inner peripheral surface of the spray head (40) and the pump base (30).

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