CN223350795U - Medicinal fungus atomizer that hinders - Google Patents

Abstract

The utility model provides a medicinal bacteria-resistant spraying device which comprises a bottle body and a spraying pump assembly, wherein the spraying pump assembly comprises a pressing buckle cover, a pump base, a spray head, a piston assembly and a one-way valve assembly, 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 main body in a sealing manner, the second auxiliary piston is fixedly arranged at the lower end of the piston main body and/or the lower end of the first auxiliary piston in a sealing manner, the pump base is provided with a base cylinder part and a base core column, a sealing cavity is formed by the base cylinder part, the base core column, the first auxiliary piston and the second auxiliary piston, and an exhaust protrusion part is arranged at the bottom of the sealing cavity of the pump base, and an exhaust groove is formed in the exhaust protrusion part. According to the utility model, the piston assembly in the spray pump assembly is arranged into three pistons, so that the structure of each piston is relatively simple, the structure of the injection mold is relatively simple, the deformation is relatively small during the production of products, and the product quality of each piston is ensured.

Description

Medicinal fungus atomizer that hinders

Technical Field

The utility model relates to the technical field of nasal cavity spray administration, in particular to a medicinal bacteria-blocking spray device.

Background

At present, a drug delivery device for nasal administration is generally a spray pump structure, wherein a spray head is pressed to suck a drug solution into an internal channel of the spray pump, and finally the drug solution is sprayed out through a nozzle at the upper end of the spray pump.

In the prior art, the spray pump is of a normally closed nozzle structure, a subsidiary column capable of moving up and down and a spring acting on the subsidiary column are arranged at the nozzle, and the subsidiary column and the spring cooperate to play a role of a one-way valve, for example, a medicinal antibacterial nasal spray drug feeder disclosed in China patent application number 202322795129.3. When the spray pump is not in use, the auxiliary column is tightly attached to the nozzle under the action of the spring, so that the liquid medicine in the spray pump is prevented from flowing out, and external air is prevented from entering. When the spray pump is used, after the spray head is pressed, the liquid medicine is sucked into the internal channel of the spray pump and then acts on the auxiliary column, under the action of the liquid pressure, the auxiliary column moves in the direction away from the spray nozzle to allow the liquid medicine to be sprayed out through the spray nozzle, after the liquid is discharged once, the liquid pressure disappears, and the auxiliary column is reset under the action of the spring to rapidly seal the spray nozzle.

The piston structure of the spray pump comprises two pistons, namely a main piston which is fixed in the spray head and can move up and down along with the spray head, and a secondary piston which is fixed on the pump main body. However, the structure of the main piston involved in this structure is relatively complicated, and has a piston main body, a piston inner sleeve provided on the inner peripheral side of the piston main body, a piston stem provided on the inner peripheral side of the piston inner sleeve, and a piston liquid outlet groove provided in the piston inner sleeve, the piston main body is provided long, the lower end thereof needs to extend into the pump main body, and the lower end of the piston stem extends into the sub-piston. In order to ensure sealing performance, it is necessary to provide sealing flanges at both the lower end of the piston stem of the main piston and the upper end of the outer periphery of the sub piston. Eventually, the structure of the main piston or the auxiliary piston is complicated. The main piston or the auxiliary piston is an injection molding product, so that the structure of an injection mold for producing the main piston or the auxiliary piston is complex, the product is easy to deform greatly during production, and the performance of the piston structure cannot be reliably ensured.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model is to provide a medicinal antibacterial spraying device, which simplifies the structure of each piston in the piston structure, further simplifies the structure of an injection mold for producing each piston, and ensures the product quality of each piston.

In order to achieve the above purpose, the utility model provides a medicinal bacteria-resistant spraying device, which comprises a bottle body and a spraying pump assembly, wherein the spraying pump assembly comprises a pressing buckle cover arranged at the upper end of the bottle body, a pump base fixed in the pressing buckle cover, a spray head arranged on the pump base in a vertically movable manner, a piston assembly fixed in the spray head, and a one-way valve assembly, the top of the spray head is provided with a spray nozzle, and the piston assembly comprises a main piston, a first auxiliary piston and a second auxiliary piston; the main piston comprises a piston fixing part, a piston main body, a piston connecting part and a piston liquid outlet hole, wherein the piston fixing part is sealed and fixed in a spray head, the piston main body is fixed on the inner periphery side of the piston fixing part, the piston connecting part is connected between the piston fixing part and the piston main body, and the piston liquid outlet hole is formed in the piston connecting part;

The pump base is provided with a base cylinder part which is in sliding seal fit with the outer periphery of the first auxiliary piston and a base stem which is in sliding seal fit with the inner periphery of the second auxiliary piston, an exhaust liquid suction cavity which is communicated with the inner cavity of the bottle body is formed in the base stem, a sealing cavity is enclosed among the base cylinder part, the base stem, the first auxiliary piston and the second auxiliary piston, the sealing cavity is communicated with the lower side of the lower liquid outlet channel, an exhaust protruding part is arranged at the bottom of the sealing cavity, and an exhaust groove is formed in the exhaust protruding part;

when the spray head is not pressed downwards, the second auxiliary piston is separated from the base core column;

When the spray head is pressed downwards and is not at the bottom, the second auxiliary piston is matched with the base stem in a sliding sealing manner, the second auxiliary piston is distributed on the upper side of the exhaust protruding part, and the sealing cavity is not communicated with the exhaust liquid suction cavity;

when the spray head is pressed downwards to the bottom, the second auxiliary piston is in contact fit with the exhaust protruding part, and the sealing cavity is communicated with the exhaust liquid suction cavity through the exhaust groove.

Further, the second auxiliary piston comprises a piston stem and a piston cylinder part fixedly arranged at the lower end of the piston stem, the piston stem is fixedly arranged in the lower end of the piston main body in a sealing mode, the piston cylinder part is fixedly arranged in the lower end of the second auxiliary piston in a sealing mode, and the lower liquid outlet channel is formed between the piston cylinder part and the second auxiliary piston.

Further, the primary piston, the first secondary piston and the second secondary piston are injection molded.

Further, the upper liquid outlet channel is at least one groove formed in the outer peripheral surface of the piston main body, and the lower liquid outlet channel is at least one groove formed in the outer peripheral surface of the piston cylinder.

Further, a first sealing flange is arranged at the lower end of the first auxiliary piston, and the first sealing flange is in sliding sealing fit with the inner peripheral surface of the base barrel part; the second auxiliary piston is provided with a second sealing flange at the lower end of the piston cylinder part, and the second sealing flange can be in sliding sealing fit with the outer peripheral surface of the base core column.

Further, the first sealing flange is obliquely arranged outwards and downwards, the second sealing flange is obliquely arranged inwards and downwards, a circle of base separation parts are arranged at the bottom of the sealing cavity of the pump base, and the base separation parts are distributed on the outer periphery side of the exhaust protruding part;

When the nozzle is pressed downward to the bottom, the base partition is interposed between the first sealing flange and the second sealing flange.

Further, the lower end of the inner peripheral surface of the second sealing flange is provided with a first guide surface which extends outwards and downwards obliquely, the upper end of the base core column is provided with a second guide surface which extends outwards and downwards obliquely, and the first guide surface can be in contact with the second guide surface.

Further, the one-way valve assembly comprises a main column fixed in the top of the spray head, an auxiliary column assembled between the main column and the main piston in a vertically movable manner, and a first reset spring, wherein a valve liquid outlet hole and a valve liquid outlet groove are formed in the main column, a valve liquid outlet channel is formed between the outer peripheral surface of the auxiliary column and the inner peripheral 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 sequentially communicated, the auxiliary column is provided with a sealing column part which is inserted in the main column in a sliding manner, and the upper end and the lower end of the first reset spring are respectively abutted against the auxiliary column and the main piston;

When the liquid pressure in the liquid outlet channel of the valve is smaller than the spring force of the first reset spring, the auxiliary column is in an upward moving state, and the sealing column part of the auxiliary column seals the nozzle;

When the liquid pressure in the valve liquid outlet channel is larger than the spring force of the first reset spring, the auxiliary column moves downwards, the sealing column part of the auxiliary column is far away from the nozzle, and the valve liquid outlet groove is communicated with the nozzle.

Further, the spray pump assembly further comprises a pressing cover fixed on the periphery of the spray head, an air return gap formed between the pressing cover and the pressing buckle cover, an air return groove formed on the periphery of the lower end of the spray head, an air return hole formed in the pump base, an air return channel formed in the pump base and a filtering 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 communicated;

The filtering component comprises a filtering membrane sleeve, a filtering membrane plug and a bacteria blocking filtering membrane, wherein the filtering membrane sleeve is tightly fixed in the air return channel, the filtering membrane plug is tightly fixed in the filtering membrane sleeve, the inner peripheral surface of the filtering membrane sleeve is provided with a fixing step protruding inwards, and the outer edge of the bacteria blocking filtering membrane is clamped between the fixing step and the filtering membrane plug.

Further, the spray pump assembly further comprises a second reset spring, the second reset spring is sleeved on the outer periphery of the base cylinder part and the outer periphery of the first auxiliary piston, and the upper end and the lower end of the second reset spring are respectively abutted against the inner peripheral surface of the spray head and the pump base.

As described above, the medicinal bacteria-blocking spraying device provided by the utility model has the following beneficial effects:

The piston assembly in the spray pump assembly is provided with three pistons, namely the main piston, the first auxiliary piston and the second auxiliary piston, the main piston does not need to be matched with the pump base in a sliding sealing way, the piston fixing part of the main piston can be shortened when the spray head is pressed by the first auxiliary piston and the second auxiliary piston to suck liquid medicine through the mutual matching of the spray head and the pump base, meanwhile, the second auxiliary piston is assembled at the lower end of the main piston and/or the first auxiliary piston, the second auxiliary piston can be simplified, and the first auxiliary piston of the cylinder structure is combined, so that the structures of the main piston, the first auxiliary piston and the second auxiliary piston are simplified, the structure of each injection mould for producing the main piston, the first auxiliary piston and the second auxiliary piston is simpler, the deformation is smaller when producing products, and the product quality of each piston is effectively ensured.

Drawings

FIG. 1 is a schematic structural view of a medicinal antibacterial spray device of the present application.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a cross-sectional view taken along A-A of fig. 2.

Fig. 4 is a B-B cross-sectional view of fig. 2.

Fig. 5 is a schematic structural view of a spray head according to the present application.

Fig. 6 and 7 are schematic views of the main piston of the present application from different angles.

FIG. 8 is a schematic representation of the structure of a second slave piston of the present application.

Fig. 9 is a top view of a pump base of the present application.

Fig. 10 is a C-C cross-sectional view of fig. 9.

FIG. 11 is a schematic structural view of a main column according to the present application.

Fig. 12 is a state diagram of the medicinal antibacterial spray device of the present application when the spray head is not pressed down.

FIG. 13 is a view showing the state of the spraying device for preventing bacteria in accordance with the present application when the spray head is pressed downward to the bottom.

Description of element reference numerals

10. Bottle body

20. Press buckle cover

30. Pump base

31. Base tube

32. Base stem

33. Exhaust liquid suction cavity

34. Sealed chamber

35. Exhaust protrusion

36. Exhaust groove

37. Base partition

38. Second guide surface

39. Air return hole

310. Air return channel

40. Spray head

41. Nozzle

42. Air return groove

50. Main piston

51. Piston fixing part

52. Piston body

53. Piston connecting part

54. Piston liquid outlet hole

60. First auxiliary piston

61. First sealing flange

70. Second slave piston

71. Piston stem

72. Piston cylinder

73. Second sealing flange

74. A first guide surface

81. Upper liquid outlet channel

82. Lower liquid outlet channel

90. Main column

91. Valve liquid outlet hole

92. Valve liquid outlet groove

110. Auxiliary column

111. Sealing post

120. First return spring

130. Valve liquid outlet channel

140. Pressing cover

151. Filter membrane sleeve

152. Filter membrane plug

153. Bacteria-blocking filtering membrane

160. Second return spring

170. Suction pipe

180. Dust-proof cover

190. Silica gel pad

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the utility model, and the relative changes or modifications are not to be construed as essential to the scope of the utility model.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element through intervening elements.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is 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" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

As shown in fig. 1 and 2, the application relates to a medicinal bacteria-blocking spraying device, which is used for spraying liquid medicine to nasal cavities after atomizing, wherein the medicine can reach respiratory tracts and lungs.

As shown in fig. 1 and 2, the medical antibacterial spraying device provided by the application comprises a bottle body 10 and a spraying pump assembly, wherein liquid medicine is contained in the bottle body 10, and the spraying pump assembly is arranged at an opening at the upper end of the bottle body 10. As shown in fig. 3 and 4, the spray pump assembly comprises a press-button cap 20, a pump base 30, a spray head 40, a piston assembly and a check valve assembly, wherein the bottle body 10 is a press-button bottle, the press-button cap 20 is buckled and installed at the upper end of the bottle body 10, the spray pump assembly is integrally installed at the upper end of the bottle body 10, the pump base 30 is fixed in the press-button cap 20, the spray head 40 is installed on the pump base 30 in a vertically movable manner, a spray nozzle 41 is arranged at the top of the spray head 40 and is used for atomizing and spraying out liquid medicine, the piston assembly is fixed in the spray head 40 and can move up or down together with the spray head 40, the check valve assembly is assembled between the top of the spray head 40 and the upper end of the piston assembly, the check valve assembly acts on the spray nozzle 41, the spray nozzle 41 is in a normally closed structure, the liquid medicine is allowed to be sprayed out from the spray nozzle 41 when the medicine is administrated, the spray pump assembly is closed when the medicine is not administrated, and external air cannot enter the spray pump assembly from the spray nozzle 41 to play a role of resisting bacteria, and the liquid medicine in the bottle body 10 is prevented from deteriorating.

In particular, as shown in fig. 3 and 4, the piston assembly includes a master piston 50, a first slave piston 60, and a second slave piston 70. As shown in fig. 3, 4, 6 and 7, the main piston 50 includes a piston fixing portion 51 sealed and fixed in the head 40, a piston main body 52 fixed at the inner peripheral side 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 main body 52, and at least one piston outlet hole 54 opened at the piston connecting portion 53, and a check valve assembly is provided between the top of the main piston 50 and the nozzle 41 of the head 40. As shown in fig. 3 and 4, the first slave piston 60 has a cylindrical structure and is sealed and fixed to the outer periphery of the piston main body 52, and an upper liquid outlet passage 81 is provided between the first slave piston 60 and the piston main body 52. As shown in fig. 3, 4 and 8, the second slave piston 70 is sealingly fixed to the piston main body 52 and/or the lower end of the first slave piston 60, and a lower liquid outlet passage 82 is provided between the first slave piston 60 and the second slave piston 70. The lower liquid outlet channel 82, the upper liquid outlet channel 81, the piston liquid outlet hole 54 and the check valve assembly are sequentially communicated.

Further, as shown in fig. 3, 4, 9 and 10, the pump base 30 is provided with a base cylinder 31 and a base stem 32 which extend up and down, an air-exhausting and liquid-sucking cavity 33 communicated with the inner cavity of the bottle 10 is formed in the base stem 32, the base cylinder 31 is in sliding sealing fit with the outer periphery of the first auxiliary piston 60 to form a seal therebetween, meanwhile, in the process of pressing the spray head 40, the base stem 32 can be in sliding sealing fit with the inner periphery of the second auxiliary piston 70, a sealing cavity 34 is formed among the base cylinder 31, the base stem 32, the first auxiliary piston 60 and the second auxiliary piston 70 in a surrounding manner, the sealing cavity 34 is an annular cavity, the sealing cavity 34 is directly communicated with the lower side of the lower liquid outlet channel 82, an air-exhausting protrusion 35 is formed at the bottom of the sealing cavity 34, and an air-exhausting groove 36 is formed in the air-exhausting protrusion 35 of the pump base 30.

When the medicinal antibacterial spray device is not in use, the medicinal antibacterial spray device is also in an initial state at this time, as shown in fig. 3, when the spray head 40 is in a state of not being pressed downwards, the spray head 40, the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are all in upper limit positions of respective strokes, the lower end of the second auxiliary piston 70 is separated from the base stem 32, and a gap is formed between the lower end of the second auxiliary piston and the base stem. At the same time, there is no liquid medicine in the internal passage of the spray pump assembly, and the one-way valve assembly closes the nozzle 41.

When the medicinal antibacterial spray device is used for administration, a user presses the spray head 40 downwards, and in the process, the spray head 40 moves downwards to drive the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 to move downwards together. As the head 40, the master piston 50, the first slave piston 60 and the second slave piston 70 move downward, first, as shown in fig. 12, the second slave piston 70 starts to contact the outer peripheral surface of the base stem 32 and is in sliding seal engagement with both, but the second slave piston 70 is distributed above the exhaust protrusion 35 and does not reach the exhaust protrusion 35, and sealing is started by sliding seal engagement of the second slave piston 70 with the base stem 32 and sliding seal engagement of the first slave piston 60 with the base cylinder 31, so that a sealed seal chamber 34 is formed, the seal chamber 34 is not in communication with the exhaust liquid suction chamber 33, and the seal chamber 34 is blocked by sealing of the second slave piston 70 with the base stem 32. Thereafter, as the showerhead 40 continues to be pressed, the showerhead 40 drives the primary piston 50, the first secondary piston 60, and the second secondary piston 70 to continue to move downward, the volume of the seal chamber 34 gradually decreases, and the gas in the seal chamber 34 is gradually compressed. Then, when the nozzle 40 is pressed downward to the bottom, that is, at least one of the nozzle 40, the first slave piston 60 or the second slave piston 70 is limited by the pump base 30, at this time, as shown in fig. 13, the second slave piston 70 is in contact with the vent protrusion 35, and the vent protrusion 35 is provided with the vent groove 36, so that the vent groove 36 breaks the seal, the seal chamber 34 is communicated with the vent liquid absorbing cavity 33 through the vent groove 36, the gas in the seal chamber 34 is decompressed, the gas in the seal chamber 34 is discharged into the bottle body 10 through the vent groove 36, the gap between the second slave piston 70 and the outer periphery of the base stem 32, and the vent liquid absorbing cavity 33, and bubbles are generated in the bottle body 10. Finally, the user releases the pressure on the spray head 40, the spray head 40 moves upwards to drive the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 to move downwards together, when the second auxiliary piston 70 leaves the exhaust protrusion 35, the second auxiliary piston forms a seal with the base core column 32 again, so that the airtight sealed chamber 34 is formed again, the volume of the sealed chamber 34 gradually increases along with the upward movement of the spray head 40, the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70, negative pressure is generated, the liquid medicine in the bottle body 10 is sucked out under the action of the negative pressure, and finally the sucked liquid medicine flows into the sealed chamber 34 under the state that the second auxiliary piston 70 is separated from the base core column 32. After the spray head 40 is released by repeated pressing, the sealed chamber 34 is filled with the chemical solution. When the spray head 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 check valve assembly in order along with the reduction of the volume of the sealed chamber 34, and the check valve assembly is opened under the action of the liquid pressure of the liquid medicine, so that the liquid medicine is sprayed out in a mist form through the nozzle 41 for administration.

After the medicine antibacterial spraying device finishes one-time administration, the liquid pressure in the spraying pump assembly disappears, the one-way valve assembly re-closes the nozzle 41, the inside and the outside of the nozzle 41 are isolated again, the phenomenon that the inside liquid medicine is deteriorated due to contact with the outside air and the phenomenon that the inside liquid medicine is deteriorated due to pollution of the outside environment are avoided, and the medicine effect of the inside liquid medicine is ensured.

The application sets the piston assembly in the spray pump assembly as three pistons, namely a main piston 50, a first auxiliary piston 60 and a second auxiliary piston 70, wherein the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are all injection molded parts and are produced by adopting a mold for injection molding. The combination of the primary piston 50, the first secondary piston 60 and the second secondary piston 70 in the present application serves as the primary piston in the prior art medicinal anti-bacterial nasal spray dispenser, and the pump base 30 in the present application serves as the secondary piston and the pump body in the prior art medicinal anti-bacterial nasal spray dispenser. In this way, in the spray pump assembly according to the present application, the main piston 50 does not need to be in sliding sealing engagement with the pump base 30, but the piston fixing portion 51 of the main piston 50 can be shortened by the mutual engagement of the first auxiliary piston 60 and the second auxiliary piston 70 with the pump base 30 to achieve the pumping of the liquid medicine after the pressing of the spray head 40, and simultaneously, the second auxiliary piston 70 is assembled at the lower end of the main piston 50 and/or the first auxiliary piston 60, so that the second auxiliary piston 70 can be simplified, the first auxiliary piston 60 of the cylinder structure is combined, the structures of the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are simplified, and finally, the structure of each injection mold for producing the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 is simpler, the deformation is smaller during the production of the product, and the product quality of each piston is effectively ensured.

Further, as shown in fig. 3, 4 and 8, the second slave piston 70 includes a piston stem 71, and a piston cylinder portion 72 fixed to the lower end of the piston stem 71, the piston stem 71 is sealingly fixed to the lower end of the piston main body 52, the piston cylinder portion 72 is sealingly fixed to the lower end of the second slave piston 70, and a lower liquid outlet passage 82 is formed between the piston cylinder portion 72 and the second slave piston 70. In the above-described spray pump assembly, the piston fixing portion 51 of the main piston 50 is preferably fixed in the spray head 40 in a tight fit manner, the first sub-piston 60 is fixed in a tight fit manner to the main piston 50, specifically, the inner peripheral surface of the piston fixing portion 51 and the outer peripheral surface of the piston main body 52 are both fixed in a tight fit manner, so that the stress surface of the first sub-piston 60 is large and the stress is more uniform when the first sub-piston 60 and the main piston 50 are assembled, the piston stem 71 of the second sub-piston 70 is fixed in a tight fit manner to the inner peripheral surface of the piston main body 52, and the piston cylinder 72 of the second sub-piston 70 is fixed in a tight fit manner to the inner peripheral surface of the first sub-piston 60. The fastening is achieved by a tight fit, while providing good sealing between the nozzle 40 and the master piston 50, and between the master piston 50 and the second slave piston 70.

Preferably, the upper and lower liquid outlet passages 81 and 82 may be formed in such a manner that grooves are opened on the outer circumferential surface of the piston main body 52 and/or the inner circumferential surface of the first sub-piston 60 to form the upper liquid outlet passage 81, and grooves are opened on the outer circumferential surface of the piston cylinder portion 72 and/or the inner circumferential surface of the first sub-piston 60 to form the lower liquid outlet passage 82. In this embodiment, as shown in fig. 3 and 6, two grooves of the upper liquid outlet channel 81 are formed on the outer peripheral surface of the piston main body 52, the two grooves forming the upper liquid outlet channel 81 are distributed at 180-degree intervals along the circumferential direction of the piston main body 52, and as shown in fig. 3 and 8, two grooves of the lower liquid outlet channel 82 are formed on the outer peripheral surface of the piston cylinder 72, and the two grooves forming the lower liquid outlet channel 82 are distributed at 180-degree intervals along the circumferential direction of the piston cylinder 72. With this arrangement, the processing of grooves on the inner peripheral surface of the first slave piston 60 can be omitted, and the processing of grooves on the outer peripheral surfaces of the piston cylinder portion 72 of the master piston 50 and the piston cylinder portion 72 of the second slave piston 70 can be omitted, thereby facilitating the processing.

Further, as shown in fig. 3 and 4, the lower end of the first slave piston 60 is provided with a first sealing flange 61, the first sealing flange 61 is in sliding sealing fit with the inner peripheral surface of the base cylinder 31 to realize sealing between the first slave piston 60 and the base cylinder 31, the second slave piston 70 is provided with a second sealing flange 73 at the lower end of the piston cylinder 72, and the second sealing flange 73 can be in sliding sealing fit with the outer peripheral surface of the base stem 32 to realize sealing between the second slave piston 70 and the base stem 32. The first sealing flange 61 is inclined downward and outward, the second sealing flange 73 is inclined downward and inward, and the pump base 30 is provided with a round of base partition 37 at the bottom of the seal chamber 34, and the base partition 37 is distributed on the outer peripheral side of the exhaust protrusion 35. At the same time, the lower end of the first sealing flange 61 is abutted against the sealing chamber 34, thereby forming a limit for the downward movement of the spray head 40, the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70, that is, limiting the downward movement distance of the first auxiliary piston 60 and the second auxiliary piston 70 when the spray head 40 is pressed in sequence, so as to achieve the purpose of controlling the dosage.

Preferably, as shown in fig. 3 and 4, the lower end of the inner peripheral surface of the second sealing flange 73 is provided with a first guide surface 74 extending obliquely downward and outward, and the upper end of the base stem 32 is provided with a second guide surface 38 extending obliquely downward and outward, and when the nozzle 40 is pressed downward to bring the lower end of the second slave piston 70 into contact with the base stem 32, the first guide surface 74 can be brought into contact with the second guide surface 38, and by the oblique arrangement 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 stem 32, so that the second sealing flange 73 is brought into close contact with the outer peripheral surface of the base stem 32, and sealing is reliably formed. In addition, when the second sealing flange 73 is tightly attached to the outer peripheral surface of the base stem 32, as shown in fig. 12, there is a gap between the piston cylinder 72 of the second slave piston 70 and the base stem 32, that is, the second slave piston 70 is in contact fit with the base stem 32 only at the second sealing flange 73 at the lower end thereof, while the first slave piston 60 is in contact fit with the base cylinder 31 only at the first sealing flange 61 at the lower end thereof, so that the contact surface can be reduced while the seal is effectively formed, and the user can press the spray head 40 downward more easily.

Further, as shown in fig. 3 and 4, the check valve assembly includes a main column 90 fixed in the top of the head 40, a sub-column 110 assembled between the main column 90 and the main piston 50 to be movable up and down, and a first return spring 120, a valve outlet hole 91 is opened in the main column 90, a valve outlet groove 92 is opened in the top of the main column 90, a valve outlet passage 130 is formed between the outer circumferential surface of the sub-column 110 and the inner circumferential surface of the head 40, the piston outlet hole 54, the valve outlet passage 130, the valve outlet hole 91 and the valve outlet groove 92 are sequentially communicated, 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 a groove at the top of the main piston 50. When the liquid pressure in the valve liquid outlet passage 130 is smaller than the spring force of the first return spring 120, the sub-column 110 is in an upward moving state, the sealing column portion 111 of the sub-column 110 blocks the nozzle 41, and when the liquid pressure in the valve liquid outlet passage 130 is larger than the spring force of the first return spring 120, the sub-column 110 moves downward, the sealing column portion 111 of the sub-column 110 is away from the nozzle 41, and the valve liquid outlet groove 92 communicates with the nozzle 41. Thus, a normally closed nozzle 41 is formed, and when the spray head 40 is pressed several times to make the chemical liquid enter the outer circumference of the auxiliary column 110, the auxiliary column 110 moves down under the pressure of the chemical liquid, thereby opening the nozzle 41, and when one spray is discharged, the auxiliary column 110 moves up under the action of the first return spring 120, thereby rapidly closing the nozzle 41. In addition, as shown in fig. 11, the valve liquid outlet groove 92 at the top of the main column 90 is a cyclone groove, and when liquid is discharged, the liquid medicine flows through the cyclone groove, forms mechanical stirring under the action of pressure, and is sprayed out through the nozzle 41 in a mist form, so that the liquid discharging effect is improved.

Further, as shown in fig. 3 and 4, the spray pump assembly further includes a second return spring 160, the second return spring 160 is sleeved on the outer circumference of the base cylinder 31 and the first auxiliary piston 60, and the upper and lower ends of the second return spring 160 are respectively abutted against the inner circumferential surface of the spray head 40 and the pump base 30. When the spray head 40 is released, the spray head 40 moves upward to be restored under the action of the second restoring spring 160, and the main piston 50, the first auxiliary piston 60 and the second auxiliary piston 70 are driven to move upward to be restored together.

Further, as shown in fig. 3 to 5, the spray pump assembly further includes a pressing cap 140 fixed to the outer circumference of the spray head 40, the pressing cap 140 having a horizontal plate portion for a user to press, so that the user can press the spray head 40 downward through the pressing cap 140. In addition, the spray pump assembly further includes an air return gap formed between the pressing cap 140 and the pressing cap 20, an air return groove 42 formed at the outer circumference of the lower end of the spray head 40, an air return hole 39 formed in the pump base 30, an air return passage 310 formed in the pump base 30, and a filter assembly, the air return gap, the air return groove 42, the air return hole 39, the air return passage 310 and the inner cavity of the bottle 10 being sequentially communicated, the filter assembly including a filter membrane sleeve 151 tightly fixed in the air return passage 310, a filter membrane plug 152 tightly fixed in the filter membrane sleeve 151, and a bacteria-blocking filter membrane 153, an inwardly protruding fixing step being provided on the inner circumferential surface of the filter membrane sleeve 151, the outer edge of the bacteria-blocking filter membrane 153 being clamped between the fixing step and the filter membrane plug 152. After the liquid discharge of the first spraying time is completed, the liquid medicine in the bottle body 10 is reduced, and at the moment, the external air sequentially passes through the air return gap, the air return groove 42, the air return hole 39, the air return channel 310 and the bacteria-blocking filter membrane 153 and then enters the bottle body 10, so that negative pressure is avoided from being formed in the bottle body 10, and the next normal liquid discharge is ensured. The bacteria-blocking filter membrane 153 filters out bacteria impurities and the like in the air, ensures that the air entering the bottle body 10 is clean gas, ensures that the gas in the bottle body 10 is kept in a dust-free and sterile state, and prevents the liquid medicine in the bottle body 10 from being polluted.

Further, as shown in fig. 3 and 4, the spray pump assembly further includes a suction pipe 170, an upper end of the suction pipe 170 is fixed in the pump base 30 and extends to a lower end of the degassing and sucking chamber 33, the lower end of the suction pipe 170 is disposed at the bottom of the bottle body 10, and the degassing and sucking chamber 33 is communicated with the inner cavity of the bottle body 10 through the suction pipe 170. As shown in fig. 1, 3 and 4, the spray pump assembly further includes a dust cap 180, and the dust cap 180 can be detachably covered on the outer circumference of the spray head 40, so as to protect the spray head 40 and prevent dust. A silica gel gasket 190 is arranged between the upper end of the bottle body 10 and the pump base 30 and the pressing cover 20, and the silica gel gasket 190 plays a role in sealing so as to prevent the liquid medicine from leaking out from the position.

In summary, the present utility model effectively overcomes the disadvantages of the prior art and has high industrial utility value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A medicinal bacteria-blocking spraying device comprises a bottle body (10) and a spraying pump assembly, wherein the spraying pump assembly comprises a pressing buckle cover (20) arranged at the upper end of the bottle body (10), a pump base (30) fixed in the pressing buckle cover (20), a spray head (40) arranged on the pump base (30) in a vertically movable mode, a piston assembly fixed in the spray head (40) and a one-way valve assembly, the top of the spray head (40) is provided with a spray nozzle (41), the medicinal bacteria-blocking spraying device is characterized in that 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 part (51) which is fixedly arranged in the spray head (40), a piston main body (52) which is fixedly arranged on the inner periphery of the piston fixing part (51), a piston connecting part (53) which is connected between the piston fixing part (51) and the piston main body (52), and a piston liquid outlet hole (54) which is formed in the piston connecting part (53), the first auxiliary piston (60) is of a cylinder structure and is fixedly arranged on the periphery of the piston main body (52) or the second auxiliary piston (60) and the second auxiliary piston (70) is fixedly arranged on the periphery of the piston main body (52), a lower liquid outlet channel (82) is formed between the first auxiliary piston (60) and the second auxiliary piston (70), the one-way valve assembly is arranged between the main piston (50) and the nozzle (41) of the spray head (40), and 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 communicated;

The pump base (30) is provided with a base cylinder part (31) which is in sliding seal fit with the periphery of the first auxiliary piston (60) and a base core column (32) which is in sliding seal fit with the inner periphery of the second auxiliary piston (70), an exhaust liquid suction cavity (33) which is communicated with the inner cavity of the bottle body (10) is formed in the base core column (32), a sealing cavity (34) is formed by encircling the base cylinder part (31), the base core column (32), the first auxiliary piston (60) and the second auxiliary piston (70), the sealing cavity (34) is communicated with the lower side of the lower liquid outlet channel (82), an exhaust protruding part (35) is arranged at the bottom of the sealing cavity (34), and an exhaust groove (36) is formed in the exhaust protruding part (35);

When the spray head (40) is not pressed downwards, the second auxiliary piston (70) is separated from the base core column (32);

when the spray head (40) is not pressed downwards to the bottom, the second auxiliary piston (70) is in sliding sealing fit with the base stem (32), the second auxiliary piston (70) is distributed on the upper side of the exhaust protruding part (35), and the sealing cavity (34) is not communicated with the exhaust liquid suction cavity (33);

When the spray head (40) is pressed downwards to the bottom, the second auxiliary piston (70) is in contact fit with the exhaust protruding part (35), and the sealing chamber (34) is communicated with the exhaust liquid suction cavity (33) through the exhaust groove (36).

2. The device of claim 1, wherein the second sub-piston (70) comprises a piston stem (71) and a piston cylinder (72) fixed at the lower end of the piston stem (71), the piston stem (71) is sealed and fixed in the lower end of the piston main body (52), the piston cylinder (72) is sealed and fixed in the lower end of the second sub-piston (70), and the lower liquid outlet channel (82) is formed between the piston cylinder (72) and the second sub-piston (70).

3. A medicinal antibacterial spray device according to claim 1 or 2, wherein the primary piston (50), the first secondary piston (60) and the second secondary piston (70) are injection molded parts.

4. The device of claim 2, wherein the upper liquid outlet channel (81) is at least one groove formed on the outer peripheral surface of the piston main 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 device of claim 2, wherein the lower end of the first auxiliary piston (60) is provided with a first sealing flange (61), the first sealing flange (61) is in sliding sealing fit with the inner peripheral surface of the base cylinder (31), the second auxiliary piston (70) is provided with a second sealing flange (73) at the lower end of the piston cylinder (72), and the second sealing flange (73) can be in sliding sealing fit with the outer peripheral surface of the base core column (32).

6. The device according to claim 5, wherein the first sealing flange (61) is inclined downward and outward, the second sealing flange (73) is inclined downward and inward, 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 head (40) is pressed downward to the bottom, the base partition (37) is interposed between the first sealing flange (61) and the second sealing flange (73).

7. The device of claim 6, wherein the lower end of the inner peripheral surface of the second sealing flange (73) is provided with a first guide surface (74) extending obliquely outwards and downwards, the upper end of the base stem (32) is provided with a second guide surface (38) extending obliquely outwards and downwards, and the first guide surface (74) can be in contact with the second guide surface (38).

8. The device of claim 1, wherein the one-way valve assembly comprises a main column (90) fixed in the top of the spray head (40), an auxiliary column (110) assembled between the main column (90) and the main piston (50) in a vertically movable manner, and a first return spring (120), wherein a valve liquid outlet hole (91) and a valve liquid outlet groove (92) are formed in the main column (90), a valve liquid outlet channel (130) is formed between the outer peripheral surface of the auxiliary 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 sequentially communicated, the auxiliary column (110) is provided with a sealing column part (111) which is inserted in the main column (90) in a sliding manner, and the upper end and the lower end of the first return spring (120) are respectively abutted against the auxiliary column (110) and the main piston (50);

When the liquid pressure in the valve liquid outlet channel (130) is smaller than the spring force of the first return spring (120), the auxiliary column (110) is in an upward moving state, and the sealing column part (111) of the auxiliary column (110) seals the nozzle (41);

When the liquid pressure in the valve liquid outlet channel (130) is larger than the spring force of the first return spring (120), the auxiliary column (110) moves downwards, the sealing column part (111) of the auxiliary column (110) is far away from the nozzle (41), and the valve liquid outlet groove (92) is communicated with the nozzle (41).

9. The device of claim 1, wherein the spray pump assembly further comprises a pressing cap (140) fixed on the outer periphery of the spray head (40), an air return gap formed between the pressing cap (140) and the pressing cap (20), an air return groove (42) formed on the outer periphery of the lower end of the spray head (40), an air return hole (39) formed in the pump base (30), an air return channel (310) formed in the pump base (30), and a filtering 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 communicated;

The filtering component comprises a filtering membrane sleeve (151) which is tightly fixed in the air return channel (310), a filtering membrane plug (152) which is tightly fixed in the filtering membrane sleeve (151) and a bacteria-blocking filtering membrane (153), wherein the inner peripheral surface of the filtering membrane sleeve (151) is provided with a fixing step which protrudes inwards, and the outer edge of the bacteria-blocking filtering membrane (153) is clamped between the fixing step and the filtering membrane plug (152).

10. The device of claim 1, wherein the spray pump assembly further comprises a second return spring (160), the second return spring (160) is sleeved on the outer circumference of the base cylinder (31) and the first auxiliary piston (60), and the upper and lower ends of the second return spring (160) are respectively abutted against the inner circumference of the spray head (40) and the pump base (30).