sprayer

Abstract

To provide a sprayer that can spray well.SOLUTION: In some embodiments of a sprayer according to the present invention, an air piston 13 in which a stem 10 is inserted so as to freely movable vertically includes an insertion cylinder part 51 for forming a portion of an air passage 5 between the stem 10 and itself. The stem 10 is provided with a contact portion that protrudes radially outward from the stem 10, contacts the lower end of the insertion cylinder part 51 from below the insertion cylinder part 51, and closes the opening on an air cylinder 14 side in the air passage 5. The stem 10 is provided with a seal portion that blocks the connection between the air cylinder 14 and a spray hole 32a through the air passage 5. When a push-down head 3 is pressed down and a liquid piston and the air piston 13 move down in conjunction, the contact part is separated from the insertion cylinder part 51 and the opening is opened, and then the blockage of the connection by the seal portion is released.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a sprayer. [Background technology]

[0002] The sprayer described in Patent Document 1 below is known. The sprayer includes a pump having a stem that is erected in an upwardly biased state and movable downwardly from the opening of a container body containing the liquid content, and a depression head that is disposed at the upper end of the stem and has a spray hole formed therein. The pump includes a liquid piston connected to the stem, a liquid cylinder in which the liquid piston is housed so as to be able to slide up and down, an air piston connected to the stem, an air cylinder in which the air piston is housed so as to be able to slide up and down, a liquid passage that guides the liquid content in the liquid cylinder to the spray hole, and an air passage that guides air in the air cylinder to the spray hole. In the sprayer, the liquid content guided from the liquid passage to the spray hole and the air guided from the air passage to the spray hole join at the spray hole, spraying the liquid content. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-196168 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional sprayer has a problem in that the spray is unstable unless the air in the air cylinder flows through the air passage with sufficient force. This problem is particularly noticeable at the initial stage of pressing down the depressor head. Furthermore, if the depressor head is pressed down too slowly, the contents are difficult to spray.

[0005] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a method for achieving good spraying. [Means for solving the problem]

[0006] <1> A sprayer according to one aspect of the present invention comprises a pump having a stem that is erected in an upwardly biased state and is movable downwardly at the mouth of a container body that contains a liquid content, and a push-down head that is disposed at the upper end of the stem and has a spray hole formed therein, the pump comprising a liquid piston that is linked to the stem, a liquid cylinder in which the liquid piston is housed so as to be able to slide up and down, an air piston that is linked to the stem, an air cylinder in which the air piston is housed so as to be able to slide up and down, a liquid passage that leads the liquid content in the liquid cylinder to the spray hole, and an air passage that leads air in the air cylinder to the spray hole, and the liquid content that is led from the liquid passage to the spray hole and the air that is led from the air passage to the spray hole join together at the spray hole. a sprayer in which the liquid content is sprayed by inserting the air piston into the air piston, the stem being inserted therein so as to be movable up and down, and the air piston having a cylindrical insertion portion which forms part of the air passage between the stem and the stem; the stem having an abutment portion which protrudes radially outward from the stem and abuts against the lower end of the cylindrical insertion portion from below, closing the opening of the air passage on the air cylinder side; the stem having a seal portion which blocks communication between the inside of the air cylinder and the spray hole through the air passage; when the depression head is pressed down and the liquid piston and the air piston descend in conjunction with each other, the abutment portion separates from the cylindrical insertion portion, opening the opening, and then the blockage of communication by the seal portion is released.

[0007] When a user sprays the liquid content from the sprayer, the user presses the depression head. When the depression head is pressed, the liquid piston and the air piston descend in conjunction with each other. The liquid piston pressurizes the liquid cylinder, directing the liquid content in the liquid cylinder from the liquid passage to the spray hole, and the air piston pressurizes the air cylinder, directing the air in the air cylinder from the air passage to the spray hole. The liquid content guided from the liquid passage to the spray hole and the air guided from the air passage to the spray hole then meet at the spray hole, spraying the liquid content. When the air piston descends to pressurize the air cylinder, first, the stem's abutment portion separates from the insertion tube portion of the air piston, opening the opening of the air passage on the air cylinder side. Then, the seal portion of the stem releases communication, and the air cylinder and the spray hole communicate through the air passage. Then, air in the air cylinder is guided to the spray hole through the air passage. At this time, the air in the air cylinder is pressurized not only until the abutment portion separates from the insertion tube portion, but also for a further time until the seal portion releases communication. Therefore, when the air cylinder and the spray hole communicate, air pressurized to a certain extent in the air cylinder is guided to the spray hole through the air passage. This allows air to be guided to the spray hole at high speed and with great force, resulting in a good spray of the liquid content.

[0008] <2> the above <1> In the sprayer according to the above aspect, a configuration may be adopted in which the stem is provided with a pressurizing piston that protrudes annularly from the stem outward in the radial direction and has the seal portion. <3> the above <2> In the sprayer according to the above, the air piston may further include a sliding cylindrical portion fitted into the air cylinder so as to be able to move up and down freely, and the sealing portion may be provided on the outer peripheral surface of the pressure piston and abut against the inner peripheral surface of the sliding cylindrical portion, thereby blocking communication between the inside of the air cylinder and the spray hole through the air passage.

[0009] With these configurations, when the seal portion is separated from the air piston and the inside of the air cylinder is connected to the spray hole, the air in the air cylinder can be pressurized well. [Effects of the Invention]

[0010] According to the present invention, good spraying can be achieved. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a longitudinal cross-sectional view of a sprayer according to an embodiment of the present invention. [Figure 2]FIG. 2 is an enlarged view of a portion of the sprayer shown in FIG. [Figure 3] FIG. 3 is a further enlarged view of a portion of the sprayer shown in FIG. 2. [Figure 4] 2 is a diagram showing a state in which the press-down head is pressed down from the state shown in FIG. 1. FIG. [Figure 5] FIG. 5 is an enlarged view of a portion of the sprayer shown in FIG. [Figure 6] 5 is a diagram showing a state in which the press-down head is further pressed down from the state shown in FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the sprayer according to the present invention will be described with reference to FIGS. [Configuration of sprayer] As shown in Figures 1 to 3, the sprayer 1 of this embodiment includes a pump 2 having a stem 10, and a push-down head 3 that is disposed at the upper end of the stem 10 and has a spray hole 32a formed therein. The sprayer 1 is attached to a container body A that contains the liquid content. The sprayer 1 sprays the liquid content in a mist form from the spray hole 32a.

[0013] In this embodiment, the axis passing through the center of the cross section of the container to which the pump 2 and push-down head 3 are attached is defined as the container axis O (pump axis), and hereinafter, the push-down head 3 side is defined as the upper side and the pump 2 side is defined as the lower side along the container axis O. Also, the direction along the container axis O is defined as the up-down direction, the direction perpendicular to the container axis O is defined as the radial direction, and the direction going around the container axis O is defined as the circumferential direction.

[0014] (pump) The pump 2 comprises the stem 10 erected in an upwardly biased state on the opening A1 of the container body A so as to be movable downward, an attachment cap 12 formed with an insertion hole 11 into which the stem 10 is inserted so as to be movable up and down and attached to the opening A1 of the container body A, an air cylinder 14 containing an air piston 13 connected to the push-down head 3 and the stem 10 and slidably up and down therein, a liquid cylinder 16 containing a liquid piston 15 connected to the push-down head 3 and the stem 10 and slidably up and down therein, a liquid passage 4 which guides the liquid from the liquid cylinder 16 to the spray hole 32a, and an air passage 5 which guides air from the air cylinder 14 to the spray hole 32a. In the sprayer 1, the liquid guided from the liquid passage 4 to the spray hole 32a and the air guided from the air passage 5 to the spray hole 32a join at the spray hole 32a, and the liquid is sprayed.

[0015] (Pump mounting cap) The attachment cap 12 includes a top wall portion 20 in which an insertion hole 11 is formed, a peripheral attachment wall portion 21 extending downward from the outer periphery of the top wall portion 20, and a guide tube portion 22 extending downward from the outer periphery of the insertion hole 11 in the top wall portion 20. A threaded portion is formed on the inner periphery of the peripheral attachment wall portion 21, and the threaded portion is used to screw the attachment cap 12 into the mouth portion A1 of the container body A. However, the configuration of the attachment cap 12 is not limited to this case, and for example, the attachment peripheral wall portion 21 may be attached by fitting into the mouth portion A1 of the container body A by undercut fitting.

[0016] (Pump liquid cylinder and air cylinder) The liquid cylinder 16 and the air cylinder 14 are each cylindrical, and in the illustrated example, the upper end opening of the liquid cylinder 16 and the lower end opening of the air cylinder 14 are integrally connected, so that the liquid cylinder 16 and the air cylinder 14 are formed as a single unit. More specifically, the air cylinder 14 is formed in a cylindrical shape with a bottom, and the cylindrical liquid cylinder 16 is connected to the bottom surface of the air cylinder 14 in a state of communication with the inside of the air cylinder 14. In other words, the small-diameter liquid cylinder 16 is connected to the lower side of the large-diameter air cylinder 14. However, the liquid cylinder 16 and the air cylinder 14 may be constructed as separate bodies, and then connected together by, for example, locking them together.

[0017] The upper opening of the air cylinder 14 is fixed in close contact with the inner surfaces of the peripheral mounting wall 21 and the top wall 20 of the mounting cap 12. As a result, the liquid cylinder 16 and the air cylinder 14 are arranged inside the container body A while hanging down from the mounting cap 12.

[0018] (Pump spring seat material) A spring seat member 17 is disposed at the upper end of the liquid cylinder 16. The spring seat member 17 is fixed to the liquid cylinder 16. The spring seat member 17 is cylindrical. A flange 17a is provided on the outer peripheral surface of the spring seat member 17. The flange 17a is disposed on the upper edge of the liquid cylinder 16.

[0019] (Pump stem) The stem 10 is disposed within the liquid cylinder 16, the spring seat member 17, the air cylinder 14, and the mounting cap 12. The lower end of the stem 10 is disposed within the spring seat member 17. The upper end of the stem 10 is located above the mounting cap 12. The stem 10 includes an upper stem 18 and a lower stem 19. The lower part of the upper stem 18 is fitted into the upper part of the lower stem 19 from the outside in the radial direction.

[0020] A pressurizing piston 80 is provided at the lower end of the upper stem 18. The pressurizing piston 80 protrudes radially outward from the stem 10 in an annular shape. The pressurizing piston 80 includes a base 81 and an outer circumferential cylindrical portion 82. The base 81 is plate-shaped with its front and back surfaces facing up and down. The outer circumferential cylindrical portion 82 extends downward from the outer circumferential edge of the base 81. A recess 83 is provided on the lower surface of the base 81. The recess 83 is annular. A protrusion 84 is provided on the upper surface of the base 81. The protrusion 84 is cylindrical. The protrusion 84 has a larger diameter than the recess 83.

[0021] On the inner surface of the upper stem 18, at a portion located above the upper end of the lower stem 19, a circular valve seat 60 is protruded radially inward, and a spherical liquid discharge valve 61 is provided that can be seated on and separated from this valve seat 60. The inner diameter of the lower end of the lower stem 19 is larger than the inner diameter of the portion of the lower stem 19 located above the lower end.

[0022] (Pump biasing member) The stem 10 is biased upward by a biasing member 90. The biasing member 90 is disposed between the pressure piston 80 and the spring seat member 17. The biasing member 90 is, for example, a coil spring. The biasing member 90 is cylindrical. The upper end of the biasing member 90 is disposed in the recess 83 and contacts the base 81. The lower end of the biasing member 90 contacts the spring seat member 17.

[0023] (Pump piston guide) A piston guide 100 is disposed at the lower end of the lower stem 19. The piston guide 100 includes a main body cylindrical portion 101 and a piston seat portion 102. The main body cylindrical portion 101 is fitted into the lower stem 19. The main body cylindrical portion 101 is cylindrical with a bottom. A through hole 101a is formed in the main body cylindrical portion 101. A plurality of through holes 101a are arranged at intervals in the circumferential direction. The piston seat portion 102 is provided at the lower end of the main body cylindrical portion 101. The piston seat portion 102 protrudes radially outward from the main body cylindrical portion 101. The piston seat portion 102 is annular. The piston seat portion 102 is located below the through hole 101a. The piston seat portion 102 is located below the spring seat member 17.

[0024] (Pump liquid piston) The liquid piston 15 is cylindrical. A piston guide 100 is disposed within the liquid piston 15. The liquid piston 15 is double-cylindrical. The liquid piston 15 includes a small-diameter cylinder 15a and a large-diameter cylinder 15b. The small-diameter cylinder 15a and the large-diameter cylinder 15b are connected at the center in the vertical direction. The large-diameter cylinder 15b is fitted into the liquid cylinder 16 so as to be vertically slidable. In a standby state before the pressing head 3 is pressed down, the lower end of the small-diameter cylinder 15a is removably seated on the upper surface of the piston seat portion 102. The upper end of the small-diameter cylinder 15a is fitted into the lower end of the lower stem 19 so as to be vertically slidable. A radial gap is generated between the inner peripheral surface of the small-diameter cylinder 15a and the outer peripheral surface of the main cylindrical portion 101 of the piston guide 100.

[0025] (pump air piston) The air piston 13 is arranged airtightly inside the air cylinder 14 so as to be able to slide up and down, and is equipped with an outer tube (sliding tube portion) 50 formed in a multi-stage cylindrical shape, an inner tube (insertion tube portion) 51 arranged inside the outer tube 50, a top plate portion 53 that connects the upper end of the outer tube 50 to the outer peripheral surface of the inner tube 51 and has an air hole 52 that penetrates in the vertical direction, and a piston valve body 54 that is fitted to the outer peripheral surface of the inner tube 51 and opens and closes the air hole 52.

[0026] The inner cylinder 51 is formed in a cylindrical shape that is open at the top and bottom, and the stem 10 is inserted inside it so that it can move up and down. In a standby state before the pressing head 3 is pressed down, the lower end of the inner cylinder 51 is disposed inside the protrusion 84 of the pressure piston 80. In the standby state, the lower edge of the inner cylinder 51 abuts against the inner circumferential surface of the protrusion 84.

[0027] In this embodiment, a stem groove 10a is formed between the inner tube 51 and the stem 10. The stem groove 10a is formed on the outer peripheral surface of the stem 10. The stem groove 10a is formed in a portion of the stem 10 where the inner tube 51 is disposed. The stem groove 10a extends in the vertical direction. The lower end of the stem groove 10a is continuous with the upper surface of the pressure piston 80. A plurality of stem grooves 10a are formed at intervals in the circumferential direction.

[0028] The outer cylinder 50 is fitted into the air cylinder 14 so as to be movable up and down. The outer cylinder 50 has a double cylindrical shape. A pressure applying piston 80 is disposed inside the outer cylinder 50. In a standby state before the pressing head 3 is pressed down, the outer peripheral surface of the pressure applying piston 80 tightly contacts the inner peripheral surface of the outer cylinder 50.

[0029] (Pressing head) The pressing head 3 comprises an attachment tube portion 30 into which the stem 10 is fitted, a horizontal tube portion 31 integrally formed at the upper end of the attachment tube portion 30, a spray member 32 arranged in the horizontal tube portion 31, and an engagement tube portion 33 extending downward from the horizontal tube portion 31. The mounting tube portion 30 is inserted radially inside the guide tube portion 22 of the mounting cap 12 so as to be movable up and down. The inner diameter of the lower end of the mounting tube portion 30 is larger than the inner diameter of the portion of the mounting tube portion 30 located above the lower end. The upper end of the inner tube 51 is fitted into the lower end of the mounting tube portion 30 so as to be slidable up and down.

[0030] A vertical groove 30a extending in the vertical direction and opening downward is formed in the inner peripheral surface of the mounting tube 30 at a portion where the upper end of the stem 10 is fitted (a portion located above the lower end of the mounting tube 30). The vertical groove 30a passes through the lower end of the mounting tube 30 and communicates with the stem groove 10a.

[0031] The horizontal tube portion 31 protrudes forward from the mounting tube portion 30. The upper end of the vertical groove 30a opens at the rear end of the horizontal tube portion 31. The front end of the horizontal tube portion 31 is located forward of the mounting tube portion 30. The fitting cylindrical portion 33 is fitted into the upper end portion of the stem 10. The lower end portion of the fitting cylindrical portion 33 faces the liquid discharge valve 61 from above. The lower end portion of the fitting cylindrical portion 33 restricts the amount of upward movement of the liquid discharge valve 61.

[0032] The spray member 32 includes a nozzle cylinder portion 34 disposed within the horizontal cylinder portion 31, and a nozzle tip 35 disposed at the front end of the nozzle cylinder portion 34. The rear end of the nozzle cylinder portion 34 is tightly fitted into the rear end of the horizontal cylinder portion 31. The nozzle tip 35 is fitted into the front end of the nozzle cylinder portion 34. The nozzle tip 35 is fitted into the front end of the horizontal cylinder portion 31. A spray hole 32a is disposed at the front end of the nozzle tip 35.

[0033] (liquid passage and air passage) The liquid passage 4 includes (1) the space between the inner peripheral surface of the liquid piston 15 and the outer peripheral surface of the main body cylindrical portion 101 of the piston guide 100, (2) the through hole 101a, (3) the interior of the main body cylindrical portion 101, (4) the interior of the stem 10, (5) the interior of the mating cylindrical portion 33 of the pressing head 3, (6) the space between the inner peripheral surface of the horizontal cylindrical portion 31 and the outer peripheral surface of the nozzle cylindrical portion 34, and (7) the space between the inner peripheral surface of the nozzle tip 35 and the outer peripheral surface of the nozzle cylindrical portion 34. The air passage 5 includes (1) the stem groove 10a, (2) the vertical groove 30a, and (3) the inside of the nozzle cylindrical portion .

[0034] (contact and sealing parts) Here, the stem 10 is provided with an abutment portion 85 and a seal portion 86. In the illustrated example, the abutment portion 85 and the seal portion 86 are provided on the pressure piston 80. The contact portion 85 protrudes radially outward from the stem 10 and contacts the lower end of the inner cylinder 51 from below the inner cylinder 51. The contact portion 85 closes the opening 5a on the air cylinder 14 side of the air passage 5. In this embodiment, the contact portion 85 is provided on the inner circumferential surface of the protrusion 84 of the pressurizing piston 80.

[0035] The seal portion 86 abuts against the air piston 13. The seal portion 86 blocks communication between the inside of the air cylinder 14 and the spray hole 32a through the air passage 5. In this embodiment, the seal portion 86 is provided on the outer peripheral surface of the pressurizing piston 80. The seal portion 86 abuts against the inner peripheral surface of the outer cylinder 50, thereby blocking communication between the inside of the air cylinder 14 and the spray hole 32a through the air passage 5. The seal portion 86 is formed, for example, by an annular ridge extending around the entire outer peripheral surface of the outer cylinder 50.

[0036] In this embodiment, when the press-down head 3 is pressed down and the liquid piston 15 and the air piston 13 descend in conjunction with each other, the contact portion 85 separates from the inner cylinder 51, opening the opening 5a. Thereafter, the seal portion 86 separates from the outer cylinder 50, unblocking communication caused by the seal portion 86, and communication is established between the interior of the air cylinder 14 and the spray hole 32a through the air passage 5. This configuration can be achieved, for example, by making the vertical size of the area where the contact portion 85 and the inner cylinder 51 contact each other smaller than the vertical size of the area where the seal portion 86 and the outer cylinder 50 contact each other.

[0037] [Using a sprayer] Next, a case where the sprayer 1 configured as described above is used will be described. 1 to 3, in the standby state before the press-down head 3 is pressed down, the stem 10 is urged upward by the urging member 90. The lower end of the inner cylinder 51 of the air piston 13 abuts against the abutment portion 85 of the stem 10, and the seal portion 86 of the stem 10 abuts against the outer cylinder 50 of the air piston 13.

[0038] Next, as shown in Figures 4 and 5, when the pressing head 3 is pressed down, the mounting tube portion 30 descends, and in response, the stem 10 and piston guide 100 move downward, and the biasing member 90 is compressed and deformed in the vertical direction.

[0039] At this time, as the stem 10 descends, first, the abutting portion 85 of the stem 10 separates from the inner tube 51 of the air piston 13, opening the opening 5a on the air cylinder 14 side of the air passage 5. After that, the seal portion 86 of the stem 10 separates from the air piston 13, releasing the blockage of communication caused by the seal portion 86, and the inside of the air cylinder 14 and the spray hole 32a communicate through the air passage 5. Furthermore, at this time, the pressurizing piston 80 pressurizes the inside of the air cylinder 14. As a result, the air in the air cylinder 14 is pressurized not only during the time until the abutting portion 85 separates from the inner tube 51, but also thereafter during the time until the seal portion 86 separates from the air piston 13 (the time until the blockage of communication caused by the seal portion 86 is released). Therefore, when the seal portion 86 separates from the air piston 13 and the inside of the air cylinder 14 communicates with the spray hole 32a, air that has been pressurized to a certain extent in the lower chamber located below the air piston 13 in the air cylinder 14 is guided to the spray hole 32a through the air passage 5.

[0040] As the stem 10 moves further downward, the step on the inner peripheral surface of the mounting tube portion 30 of the push-down head 3 comes into contact with the upper end of the inner tube 51. As a result, the air piston 13 is pushed down by the stem 10 and moves downward within the air cylinder 14. At this time, the air piston 13 moves downward with the piston valve body 54 still closing the air hole 52. As the air piston 13 moves, air in the lower chamber of the air cylinder 14 is guided through the air passage 5 to the spray hole 32a.

[0041] Meanwhile, as the stem 10 descends, the piston guide 100 moves downward and separates from the liquid piston 15, connecting the interior of the liquid cylinder 16 with the spray hole 32a through the liquid passage 4. Thereafter, as the stem 10 further descends, the step on the inner circumferential surface of the lower stem 19 comes into contact with the liquid piston 15. This causes the liquid piston 15 to move downward in conjunction with the stem 10, and the liquid contained in the liquid cylinder 16 rises and reaches the inside of the stem 10. Then, the liquid pressure in the liquid cylinder 16 acts on the liquid discharge valve 61 seated on the valve seat 60 of the stem 10, causing the liquid discharge valve 61 to move away from the valve seat 60, and the liquid contained in the liquid cylinder 16 is transferred to the spray hole 32a through the liquid passage 4.

[0042] As a result of the above, as shown in FIG. 6, the liquid content and air join together at the spray hole 32a, and the mist of the liquid content is discharged through the spray hole 32a of the press-down head 3.

[0043] After the discharge is completed, when the depression of the push-down head 3 is released, the elastic restoring force of the biasing member 90 causes the push-down head 3, the stem 10, and the air piston 13 and liquid piston 15 connected to the stem 10 to return to their upward biased state.

[0044] In detail, as the stem 10 rises, the seal portion 86 comes into contact with the outer cylinder 50 of the air piston 13, and the contact portion 85 comes into contact with the lower end of the inner cylinder 51 of the air piston 13 from below, causing the air piston 13 to rise together with the stem 10. At this time, the internal volume of the air cylinder 14 expands, creating negative pressure, which opens the piston valve element 54 and draws air into the air cylinder 14 through the air hole 52. As a result, the internal pressure of the air cylinder 14 returns to the state it was in before discharge, and the piston valve element 54 closes, returning to the standby state.

[0045] Meanwhile, as the stem 10 rises, the piston guide 100 comes into contact with the lower end of the small diameter cylinder 15a of the liquid piston 15 from below, and the liquid piston 15 rises together with the stem 10. At this time, the internal volume of the liquid cylinder 16 expands, generating negative pressure, so that the liquid content in the container body A is drawn into the liquid cylinder 16.

[0046] As described above, in the sprayer 1 according to this embodiment, when the air piston 13 descends to pressurize the air cylinder 14, first, the abutment portion 85 of the stem 10 separates from the inner tube 51 of the air piston 13, opening the opening 5a of the air passage 5 on the air cylinder 14 side. Then, the seal portion 86 of the stem 10 separates from the air piston 13, connecting the air cylinder 14 to the spray hole 32a through the air passage 5. Then, the air in the air cylinder 14 is guided to the spray hole 32a through the air passage 5. At this time, the air in the air cylinder 14 is pressurized not only during the time until the abutment portion 85 separates from the inner tube 51, but also during the subsequent time until the seal portion 86 separates from the air piston 13. Therefore, when the seal portion 86 separates from the air piston 13, connecting the air cylinder 14 to the spray hole 32a, air pressurized to a certain degree in the air cylinder 14 is guided to the spray hole 32a through the air passage 5. This allows air to be guided to the spray hole 32a at high speed and with great force, allowing the content liquid to be sprayed well.

[0047] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0048] The seal portion 86 does not have to be on the outer peripheral surface of the pressurizing piston 80. For example, the seal portion 86 may be a protrusion provided on the upper stem 18. For example, a configuration is adopted in which such a seal portion 86 (protrusion) is in close contact with the inner peripheral surface of the inner cylinder 51. In this case, for example, when the press-down head 3 and the stem 10 descend, the abutment portion 85 first moves away from the lower end of the inner cylinder 51, and then the seal portion 86 moves downward below the lower end of the inner cylinder 51, and the seal portion 86 moves away from the inner peripheral surface of the inner cylinder 51. The seal portion 86 may be in contact with a component other than the air piston 13, thereby blocking communication between the inside of the air cylinder 14 and the spray hole 32a through the air passage 5. For example, the seal portion 86 may be in contact with the air cylinder 14. The mounting cap 12 may be omitted.

[0049] In addition, within the scope of the spirit of the present invention, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate. [Explanation of symbols]

[0050] 1 sprayer 2 pumps 3 Depressor head 4 Liquid passage 5 Air passage 5a aperture 10 Stem 13 Air piston 14 Air Cylinder 15 Liquid piston 16 Liquid cylinder 32a spray hole 50 Outer cylinder (sliding cylinder part) 51 Inner tube (insertion tube part) 80 Pressure Piston 85 Contact part 86 Seal part A Container body A1 Mouth

Claims

1. a pump having a stem that is erected in an upwardly biased state and movable downwardly at the opening of a container body that contains the liquid content; a depression head disposed at an upper end of the stem and having a spray hole formed therein; The pump a liquid piston associated with the stem; a liquid cylinder in which the liquid piston is accommodated so as to be vertically slidable; an air piston associated with the stem; an air cylinder in which the air piston is accommodated so as to be able to slide up and down; a liquid passage that guides the liquid contained in the liquid cylinder to the spray hole; an air passage that guides the air in the air cylinder to the spray hole, A sprayer in which the liquid content guided from the liquid passage to the spray hole and the air guided from the air passage to the spray hole join together at the spray hole to spray the liquid content, the air piston includes an insertion tube portion through which the stem is inserted so as to be movable up and down, and which forms a part of the air passage between the piston and the stem; the stem is provided with an abutment portion that protrudes radially outward from the stem and abuts against a lower end of the insertion tube portion from below the insertion tube portion to close an opening of the air passage on the air cylinder side, The stem is provided with a seal portion that blocks communication between the inside of the air cylinder and the spray hole through the air passage, When the depression head is depressed and the liquid piston and the air piston descend in unison, the abutment portion separates from the insertion tube portion, opening the opening, and then the blockage of communication by the sealing portion is released.

2. The sprayer according to claim 1 , wherein the stem is provided with a pressurizing piston that protrudes radially outward from the stem in an annular shape and has the sealing portion.

3. the air piston further includes a sliding cylindrical portion fitted in the air cylinder so as to be movable up and down; 3. The sprayer according to claim 2, wherein the sealing portion is provided on an outer peripheral surface of the pressurizing piston and abuts against an inner peripheral surface of the sliding cylindrical portion, thereby blocking communication between the inside of the air cylinder and the spray hole through the air passage.

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