Ejection head and liquid ejection container

Abstract

To provide an ejection head and a liquid ejection container in which a pressing load during a pressing operation is reduced without changing a pump attached to a container body.SOLUTION: An ejection head 4 comprises: a base 5 which is fixed to a pump upper end; a head body 6 which is slidably held; an ejection part 7 for ejecting a liquid; a piston 8 which comprises a penetration flow channel r4 and is slidable in a cross direction; a piston guide which slidably penetrates the flow channel r4; a first elastic member 11 which energizes the piston 8 to a rear side; a second elastic member 12 which energizes the piston 8 to a front side; and a leverage member 13 which moves the guide to the rear side when pressing down the body 6 against the base 5. The body 6 comprises a step 14 which restricts backward movement of the piston 8. The guide comprises a seal part 9c which seals the penetration flow channel r4 by pressing the piston 8, and on the other hand, is separated from the piston 8 in such a manner that the guide is moved to the rear side by the leverage member 13 after the piston 8 contacts the step 14.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a jetting head and a liquid jetting container. [Background technology]

[0002] Conventional liquid ejection containers are equipped with a dispenser that is attached to the container body and is capable of pressurizing and ejecting the contents of the container body, and are known to improve usability by increasing the amount of ejection while preventing the pressure on the nozzle head attached to the dispenser from becoming too heavy (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-97140 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is still room for improvement in the conventional liquid ejection containers described above in terms of reducing the pressing load when pressing the nozzle head. On the other hand, there is also a demand for the pump attached to the container body to be more versatile.

[0005] An object of the present invention is to provide a jetting head and a liquid jetting container in which the pressing load during a pressing operation is reduced without the need to change the pump attached to the container body. [Means for solving the problem]

[0006] (1) A jetting head according to the present invention is attachable to a pump disposed in a container body and for jetting liquid in the container body toward the front side, and includes a base fixed to the upper end of the pump, a head body slidably held on the base, a jetting part disposed on the front side of the head body and jetting the liquid, a piston having a through-flow passage and slidable in the front-rear direction inside the head body, a piston guide slidably passing through the through-flow passage, a first elastic member supported by the piston guide and biasing the piston toward the rear side, and a piston guide. and a lever member that moves the piston guide rearward when the head body is pressed down against the base. The head body has a step that restricts the rearward movement of the piston when the piston comes into contact with it. The piston guide has a sealing portion that presses the piston to seal the through flow passage, and that moves away from the piston when the piston comes into contact with the step and the lever member moves the piston guide rearward relative to the piston.

[0007] (2) In the jet head of (1) above, the head body may include a nozzle extending forward, and the jetting portion may be disposed inside the nozzle.

[0008] (3) In the ejection head of (1) or (2) above, the first elastic member is supported on the piston guide by a support tube provided on the piston guide, and a communication passage is provided between the piston guide and the support tube to connect the through flow path to the ejection portion, and the ejection head may further include an auxiliary tube that slidably holds the support tube.

[0009] (4) A liquid ejection container according to the present invention comprises a container body capable of containing a liquid, a pump attached to the container body, and an ejection head according to any one of (1) to (3) above attached to the pump. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a jetting head and a liquid jetting container in which the pressing load during a pressing operation is reduced without changing the pump attached to the container body. [Brief explanation of the drawings]

[0011] [Figure 1] This is a cross-sectional view showing a liquid spray container according to one embodiment of the present invention in its initial state, and the liquid spray container is equipped with a spray head according to one embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view showing an area X in FIG. [Figure 3] 2 is a cross-sectional view showing the liquid spray container of FIG. 1 in a state where the spray head is pressed in, and schematically shows a state where the pressure accumulated by pressing the spray head is released. FIG. [Figure 4] 2 is a cross-sectional view showing the liquid spray container of FIG. 1 in a state where the spray head is pushed in, and schematically shows the state where the spray head is pushed in to the maximum extent. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of a jetting head and a liquid jetting container according to the present invention will be described with reference to the drawings.

[0013] In Fig. 1, reference numeral 1 denotes a liquid spray container (liquid ejection container) according to one embodiment of the present invention. The liquid spray container 1 comprises a container body 2 capable of containing a liquid C, a pump 3 attached to the container body 2, and a spray head 4 (ejection head) attached to the pump 3. The spray head 4 is a spray head according to one embodiment of the present invention.

[0014] The spray head 4 is used to drive the pump 3 disposed in the container body 2. The pump 3 can be operated by repeatedly pressing down and releasing the spray head 4. The spray head 4 can spray the liquid C contained in the container body 2 in a mist toward the front. The liquid spray container 1 equipped with the spray head 4 can be used to spray, for example, perfume, moisturizer, or other lotion.

[0015] Here, in the present disclosure, "up and down" refers to the liquid spray container 1 when it is held upright with its bottom (not shown) as the base point. Also, in the present disclosure, the "up and down direction" refers to a direction parallel to the extension direction of the central axis O1 of the liquid spray container 1. Also, in the present disclosure, the "front and back direction" refers to one of the directions perpendicular to the up and down direction (the extension direction of the central axis O1). In the drawings, the front and back axis extending in the front and back direction is indicated by the symbol O2. In particular, in the present disclosure, the "front side" refers to the side on which the nozzle A4 of the spray head 4 is located, based on the central axis O1. In contrast, in the present disclosure, the "rear side" refers to the side opposite the nozzle A4 across the central axis O1. Also, the "left and right direction" refers to a direction perpendicular to the up and down direction and the front and back direction. The "left side" and "right side" refer to the central axis O, and the "front side" refers to the front.

[0016] The spray head 4 comprises a base 5 fixed to the upper end of the pump 3, a head main body 6 held by the base 5 so as to be slidable in the vertical direction, a spray section (spray section) 7 arranged on the front side of the head main body 6 and spraying the liquid C in a mist, a piston 8 having a through flow passage r4 and capable of sliding in the front-to-back direction inside the head main body 6, a piston guide 9 slidably passing through the through flow passage r4, a first elastic member 11 supported by the piston guide 9 to urge the piston 8 toward the rear, a second elastic member 12 supported by the head main body 6 to urge the piston 8 toward the front, and a lever member 13 that moves the piston guide 9 toward the rear when the head main body 6 is pressed down against the base 5.

[0017] Figure 2 shows the region X in Figure 1. Figure 2 shows an enlarged view of the liquid spray container 1, including the periphery of the spray head 4.

[0018] The base 5 is provided with an upwardly extending sliding cylinder 5d having an inlet passage r1 communicating with the pump 3, and is fixed to the stem 39 of the pump 3. In this embodiment, the base 5 is provided with a base plate 5a having the inlet passage r1 formed therein as a through hole, a peripheral guide wall 5b serving as the outer periphery of the base plate 5a, a fitting cylinder 5c that hangs down from the base plate 5a and fits into the upper end of the stem 39 (the upper end of the pump 3), and a sliding cylinder 5d that stands up from the base plate 5a and slidably fits into a fluid passage pipe 6a provided in the head main body 6. The inlet passage r1 extends in the vertical direction.

[0019] The head body 6 includes a liquid passage 6a slidably held in a sliding cylinder 5d provided on the base 5, and an outlet passage r3 extending forward and communicating with a liquid passage r2 provided in the liquid passage 6a. In this embodiment, the head body 6 includes a top wall 6b that can be pressed by a user, a cylindrical outer wall 6c hanging down from the outer periphery of the top wall 6b, a cylindrical wall 6d that opens into the outer wall 6c and extends rearward toward the interior of the head body 6, and a rear wall 6e that closes the rear end of the cylindrical wall 6d. In this embodiment, a space S4 is provided between the outer wall 6c and the rear wall 6e. In this embodiment, the outlet passage r3 is defined by the cylindrical wall 6d and the rear wall 6e. Furthermore, in this embodiment, the liquid passage 6a is connected to the cylindrical wall 6d. In this embodiment, the liquid passage r2 extends vertically. The outlet passage r3 is connected to the upper end of the liquid passage r2. As a result, the outflow path r3 is connected to the liquid passage r2. In this embodiment, the liquid passage 6a is held slidably in the vertical direction relative to the outer peripheral surface of the sliding tube 5d of the base 5. Furthermore, in this embodiment, the outer peripheral wall 6c is held slidably in the vertical direction relative to the outer peripheral surface of the guide peripheral wall 5b of the base 5. As a result, the head main body 6 can be moved in the vertical direction relative to the base 5. However, in this embodiment, the base 5 has a hooking protrusion 5e formed on the outer peripheral surface of the guide peripheral wall 5b. Meanwhile, the head main body 6 has a hooking protrusion 6f on the inner peripheral surface of the outer peripheral wall 6c. As a result, the hooking protrusion 6f of the head main body 6 comes into contact with the hooking protrusion 5e of the base 5, preventing the head main body 6 from falling off the base 5.

[0020] Additionally, in this embodiment, the head body 6 is provided with a nozzle 6g extending toward the front side. In this embodiment, the outlet channel r3 is defined by the nozzle 6g in addition to the cylindrical wall 6d and the rear wall 6e. In this embodiment, the outlet channel r3 extends to the front end of the nozzle 6g and opens at the front end of the nozzle 6g. That is, in this embodiment, the outlet channel r3 is an outlet channel provided inside the nozzle 6g. In this embodiment, the spray unit 7 is disposed in the outlet channel r3 provided in the nozzle 6g. That is, in this embodiment, the spray unit 7 is disposed inside the nozzle 6g.

[0021] The spray unit 7 is disposed in front of the outlet passage r3, and includes an outlet A4 that forms the liquid C pressure-fed through the outlet passage r3 into a mist and sprays the mist of the liquid C. Additionally, in this embodiment, the spray unit 7 includes a plurality of swirling flow paths r7 that merge with the outlet A4.

[0022] In this embodiment, the spray unit 7 includes a gap flow path r6 communicating with the outlet channel r3, multiple swirl flow paths r7 communicating with the gap flow path r6, and a confluence space S8 where the swirl flow paths r7 converge. The swirl flow path r7 communicates with the outlet A4 through the confluence space S8. As a result, the liquid C pumped from the pump 3 swirls through the multiple swirl flow paths r7 and passes through the confluence space S8 and the outlet A4, where it is sprayed in a mist-like state. In this embodiment, the spray unit 7 includes a spray element 7a and a spray tip 7b. In this embodiment, the spray element 7a is housed within the spray tip 7b, and the spray tip 7b is fixed to the front interior of the nozzle 6g. In this embodiment, the outer peripheral surface of the spray element 7a is provided with a peripheral groove as the gap flow path r6 extending in the front-rear direction between the spray element 7a and the spray tip 7b. In addition, in this embodiment, the front surface of the spray element 7a is provided with a plurality of swirl grooves as the swirl flow path r7 formed between the spray tip 7b. The swirl groove is provided spirally toward the nozzle A4 (central axis O2). On the other hand, the spray tip 7b includes a cylindrical portion 7b1 and a partition wall 7b2 that closes the front end of the cylindrical portion 7b1. The nozzle A4 is a through-hole that penetrates the partition wall 7b2 in the front-rear direction. A recess is formed on the rear surface of the partition wall 7b2 as a joining space S8 that communicates with the nozzle A4.

[0023] The piston 8 is provided with a through-flow passage r4 extending in the front-rear direction and is a piston that can slide in the front-rear direction on the inner circumferential surface of the outflow passage r3. In this embodiment, the piston 8 is provided with a piston main body 8a provided with the through-flow passage r4, an outer sliding portion 8b as the outer circumferential portion of the piston main body 8a that can slide in the front-rear direction on the head main body 6 (outflow passage r3), and an inner sliding portion 8c as the inner circumferential portion of the piston main body 8a that can slide in the front-rear direction on the piston guide 9. In this embodiment, the outer sliding portion 8b is a cylindrical outer sliding portion that is connected to the rear end of the piston main body 8a. In this embodiment, the outer sliding portion 8b extends toward the rear. Meanwhile, in this embodiment, the inner sliding portion 8c is also a cylindrical inner sliding portion that is connected to the front end of the piston main body 8a. In this embodiment, the inner sliding portion 8c extends toward the front. Furthermore, in this embodiment, the inner sliding portion 8c, together with the piston main body 8a, defines the through-flow passage r4.

[0024] The piston guide 9 includes a seal portion 9c, which will be described later. In this embodiment, the portion of the piston guide 9 that is forward of the seal portion 9c is referred to as a front portion 9a, and the portion of the piston guide 9 that is rearward of the seal portion 9c is referred to as a rear portion 9b. A support tube 17 for supporting the first elastic member 11 is provided in the front portion 9a of the piston guide 9. In this embodiment, the front portion 9a of the piston guide 9 is housed inside the support tube 17 at intervals in the radial direction. In this embodiment, the support tube 17 includes a plurality of connecting pieces 17a spaced apart in the circumferential direction on the inner circumferential surface of the support tube 17. The connecting pieces 17a are each connected to the outer circumferential surface of the front portion 9a of the piston guide 9. As a result, in this embodiment, a communication passage r5 that connects the through-flow passage r4 to the spray unit 7 is provided between the piston guide 9 and the support tube 17. Meanwhile, a support flange 9d for supporting the second elastic member 12 is provided in the rear portion 9b of the piston guide 9. In this embodiment, the support flange 9d is an annular protrusion that protrudes radially outward from the outer circumferential surface of the rear portion 9b of the piston guide 9 and extends annularly in the circumferential direction.

[0025] The first elastic member 11 is a coil spring. In this embodiment, the front end of the first elastic member 11 is supported by a support tube 17 provided on the piston guide 9. Meanwhile, in this embodiment, the rear end of the first elastic member 11 is supported by the piston 8. In this embodiment, the rear end of the first elastic member 11 is supported by the piston main body 8a. The second elastic member 12 is also a coil spring. In this embodiment, the front end of the second elastic member 12 is supported by a support flange 9d provided on the piston guide 9. Meanwhile, in this embodiment, the rear end of the second elastic member 12 is supported by the rear wall 6e of the head main body 6. Note that, in this embodiment, the magnitude relationship between the elastic modulus of the first elastic member 11 and the elastic modulus of the second elastic member 12 can be adjusted as appropriate.

[0026] In addition, the spray head 4 further includes an auxiliary cylinder 19 that slidably holds the support cylinder 17. The auxiliary cylinder 19 is located in front of the outlet channel r3. In this embodiment, the auxiliary cylinder 19 is located inside the nozzle 6g. In this embodiment, the head main body 6 includes an outer step 21 with which the auxiliary cylinder 19 comes into contact to position the auxiliary cylinder 19. The outer step 21 is provided on the nozzle 6g. Specifically, the outer step 21 is a step that protrudes radially inward and is provided on the inner circumferential surface of the nozzle 6g. The outer step 21 faces forward. In this embodiment, the rear end of the auxiliary cylinder 19 can come into contact with the outer step 21. As a result, rearward movement of the auxiliary cylinder 19 is restricted by contact with the outer step 21. Meanwhile, the spraying unit 7 is located adjacent to the front surface of the auxiliary cylinder 19. In this embodiment, the spraying unit 7 abuts against the front surface of the auxiliary cylinder 19. In this embodiment, the sprayer 7 and auxiliary cylinder 19 are press-fitted into the nozzle 6g. As a result, in this embodiment, the auxiliary cylinder 19 is positioned between the sprayer 7 and the outer step 21. The support cylinder 17 also has a stopper protrusion 17b that comes into contact with the rear end of the auxiliary cylinder 19 to limit the forward movement of the piston guide 9 together with the support cylinder 17. The stopper protrusion 17b is an annular stopper protrusion that protrudes radially outward from the outer circumferential surface of the support cylinder 17 and also protrudes annularly in the circumferential direction. In this embodiment, the stopper protrusion 17b comes into contact with the front end of the first elastic member 11, thereby supporting the first elastic member 11 in the front-rear direction.

[0027] The lever 13 includes a rotating portion 13a that is rotatable relative to the head body 6, a first arm 13b that extends forward from the rotating portion 13a and is placed on the base 5, and a second arm 13c that extends upward from the rotating portion 13a and is connected to the rear end 9e of the piston guide 9. In this embodiment, the lever 13 is rotatably supported relative to the head body 6 via a support plate 18 that is arranged inside the head body 6. In this embodiment, the support plate 18 includes a support hole 18a through which the fluid passage pipe 6a of the head body 6 passes, a notch 18b in which the second arm 13c of the lever 13 is arranged so as to be movable in the front-rear direction, and a bearing portion 18c that rotatably supports the lever 13. In this embodiment, the support plate 18 is fixed to the head body 6 by fitting the support hole 18a of the support plate 18 into the outer peripheral surface of the liquid passage 6a of the head body 6 and fitting the outer edge of the support plate 18 into the inner peripheral surface of the outer peripheral wall 6c of the head body 6. In this embodiment, the support plate 18 also includes two bearings 18c. The two bearings 18c are spaced apart in the left-right direction. The lever member 13 has a rotating portion 13a, which is located between the two bearings 18c, rotatably supported by the two bearings 18c. This allows the lever member 13 to swing in the front-rear direction relative to the head body 6. In this embodiment, the first arm 13b is a bifurcated arm having two protrusions spaced apart in the left-right direction. The tip of the first arm 13b contacts the upper surface of the base plate 5a, with the sliding tube 5d of the base 5 and the tube wall 6d of the head body 6 sandwiched between them in the left-right direction. The second arm 13c is disposed in the cavity S4 by extending upward with the first arm 13b in contact with the base plate 5a. The piston guide 9 penetrates the rear wall 6e of the head main body 6, and a rear end 9e protruding rearward from the rear wall 6e is engaged with the second arm 13c. As a result, when the head main body 6 is pressed down relative to the base 5, the piston guide 9 can be moved rearward by the lever member 13 against the biasing force of the second elastic member 12 (in this embodiment, the biasing force is the difference between this and the first elastic member 11).

[0028] In addition, the head main body 6 is provided with an inner step (step) 14 that restricts the rearward movement of the piston 8 by contacting the inner step 14. In this embodiment, the inner step 14 is provided on the cylindrical wall 6d. Specifically, the inner step 14 is a step that protrudes radially inward and is provided on the inner peripheral surface of the cylindrical wall 6d. The inner step 14 is oriented forward. In this embodiment, the inner step 14 is positioned forward of the fluid passage pipe 6a. In this embodiment, the rear end of the outer sliding portion 8b of the piston 8 can come into contact with the inner step 14. The rearward movement of the piston 8 is restricted by contact with the inner step 14.

[0029] The piston guide 9 further includes a seal portion 9c. The seal portion 9c seals the through-flow passage r4 by pressing the piston 8 with the biasing force of the second elastic member 12. After the piston 8 contacts the inner step 14, the piston guide 9 is moved rearward relative to the piston 8 by the lever member 13, thereby separating from the piston 8. In this embodiment, the seal portion 9c is an annular seal portion that protrudes radially outward from the outer circumferential surface of the piston guide 9 and extends annularly in the circumferential direction. The seal portion 9c can be in annular contact with the piston main body 8a. In this embodiment, the seal portion 9c can be in annular contact with the inner circumferential edge portion of the piston main body 8a that forms the through-flow passage r4, i.e., the inner circumferential edge portion of the piston 8 that forms the through-flow passage r4. Specifically, the seal portion 9c seals the through-flow passage r4 by pressing the piston 8, which is biased rearward by the first elastic member 11, forward with the biasing force of the second elastic member 12. On the other hand, when the ejection head 4 is pressed down, the piston guide 9 starts to move rearward by the lever member 13, and the liquid C is pressure-fed to the outflow channel r3. Meanwhile, the piston guide 9, which presses the rear side of the piston 8, moves rearward, and the piston 8 moves rearward together with the piston guide 9 due to the biasing force of the first elastic member 11. As a result, the liquid C behind the piston 8 is compressed (accumulated). Then, when the piston 8 comes into contact with the inner step 14, the piston guide 9 continues to move rearward by the lever member 13, and the piston 8 moves forward due to the liquid C compressed (accumulated) behind the piston 8, although the biasing force towards the front from the piston guide 9 weakens. As a result, the seal portion 9c moves away from the piston 8, and the sealing of the through-channel r4 is released.

[0030] Any conventionally known pump can be appropriately applied as the pump 3. The pump 3 of Fig. 1 includes a cylinder 32, a piston 33, a piston guide 34, and a coil spring 35 in addition to the stem 39.

[0031] As shown in FIG. 1, the cylinder 32 hangs down from the opening 2a of the container body 2 into the inside of the container body 2. A mounting tube 32a extending downward is integrally provided at the lower end opening A3 of the cylinder 32. A suction tube 32b for sucking up the liquid C contained in the container body 2 is inserted into the mounting tube 32a. The mounting tube 32a and the suction tube 32b are connected to each other, and the cylinder 32, the mounting tube 32a, and the suction tube 32b are each arranged coaxially with the central axis O1. A suction valve 32c is arranged at the lower end of the cylinder 32. The suction valve 32c closes the lower end opening A3 of the cylinder 32 when the inside of the cylinder 32 is pressurized, and opens the lower end opening A3 of the cylinder 32 when the inside of the cylinder 32 is depressurized.

[0032] Furthermore, a flange portion 32d that protrudes radially outward is formed at the upper end of the cylinder 32. The flange portion 32d is disposed on the upper opening edge of the mouth portion 2a of the container body 2 via a packing 36, and the top wall 31a of the attachment cap 31 is disposed on the upper surface of the flange portion 32d.

[0033] The stem 39 is arranged to be movable up and down while being biased upward by the coil spring 35. The lower part of the stem 39 is located below the upper end opening of the cylinder 32. The upper part of the stem 39 is located above the upper end opening of the cylinder 32. The lower end of the stem 39 is radially enlarged more than the remaining part. The upper end opening edge of the stem 39 is located above the guide tube part 31b of the attachment cap 31.

[0034] The piston 33 is disposed at the lower end of the stem 39 and is housed in the cylinder 32 so as to be movable up and down in response to the up and down movement of the stem 39. The piston 33 is formed in a cylindrical shape and is disposed coaxially with the central axis O1.

[0035] The piston guide 34 is disposed coaxially with the central axis O1. An upper portion of the piston guide 34 is inserted into the stem 39. A lower portion of the piston guide 34 is connected to the piston 33. A radially penetrating communication hole 34a is formed in the lower portion of the piston guide 34. A pedestal portion 34b that protrudes radially outward is formed in the piston guide 34 below the communication hole 34a. The pedestal portion 34b supports the piston 33 from below the piston 33. This blocks communication between the portion of the cylinder 32 located below the piston 33 and the communication hole 34a. When the piston guide 34 moves downward relative to the piston 33 and the pedestal portion 34b moves downward away from the piston 33, the portion of the cylinder 32 located below the piston 33 is connected to the communication hole 34a.

[0036] A stem 39 is inserted inside the coil spring 35. The lower end of the coil spring 35 is supported by a lower support portion 37 disposed on the cylinder 32, and the upper end of the coil spring 35 is supported by an upper support portion 38 disposed above the stem 39.

[0037] As described above, the fitting cylinder 5c of the base 5 is fitted inside the stem 39. This allows the liquid C pumped by the pump 3 to be pumped to the spray head 4.

[0038] Here, the operation of the spray head 4 will be described together with the operation of the liquid spray container 1.

[0039] Figure 1 shows the initial state of the liquid spray container 1. In the initial state as shown in Figure 1, the piston guide 9 is biased to move forward due to the difference between the biasing force of the first elastic member 11 and the biasing force of the second elastic member 12. As a result, as shown in Figure 2, the seal portion 9c of the piston guide 9 presses the piston 8 forward due to the biasing force of the second elastic member 12, thereby sealing the through-flow path r4.

[0040] In the initial state shown in FIG. 1 , if the liquid C from the pump 3 is filled behind the piston 8, when the spray head 4 starts to be pressed down, the pressure (liquid C) on the rear surface of the piston 8 increases. Meanwhile, as the head body 6 is pressed down against the base 5, the lever member 13 inside the spray head 4 acts on the second arm 13c, with the first arm 13b in contact with the base 5 as a fulcrum and the rotating part 13a as a force point, causing the second arm 13c to rotate rearward. As a result, the lever member 13 moves the piston guide 8 rearward as the head body 6 is pressed down. At this time, the piston 8 also moves rearward together with the piston guide 9. When the head body 6 is further pressed down against the base 5, the pressure of the liquid C pumped to the spray head 4 increases, specifically, the pressure on the rear side of the piston 8 increases, causing pressure to accumulate (pressure buildup) in the liquid C filled inside the spray head 4.

[0041] However, the piston 8 comes into contact with an inner step 14, which is a distance ΔL rearward from the initial position, and thus its rearward movement is restricted. When the spray head 4 is subsequently pressed further downward, the piston guide 9 is moved further rearward by the lever member 13, while the piston 8 is moved forward by the biasing force of the liquid C compressed (accumulated pressure) at its rear side. As a result, as shown in FIG. 3, the seal between the seal portion 9c of the piston guide 9 and the through-flow passage r4 of the piston 8 is released. That is, in this embodiment, the through-flow passage r4 of the piston 8 is forcibly opened not only by the compressive force (accumulated pressure) of the liquid C filled in the spray head 4 but also by the operation of the lever member 13 caused by the head body 6 being pressed downward against the base 5. The lever member 13 maintains the through-flow passage r4 open even when the spray head 4 is pressed down to its maximum extent relative to the pump 3, as shown in FIG. 4. As a result, the user can pressure-feed the liquid C compressed (pressure-accumulated) inside the spray head 4 to the spray unit 7 through the through-flow path r4 simply by pressing down the spray head 4, regardless of the type of pump 3 attached to the container body 2. The liquid C pressure-feeded from the through-flow path r4 swirls inside the spray unit 7, merges in the merging space S8, and is then sprayed through the outlet A4. This allows the user to spray the liquid C in a mist form from the outlet A4 without having to significantly increase the internal pressure of the spray head 4 by opening the through-flow path r4, as in the conventional case.

[0042] That is, according to the spray head 4, and therefore the liquid spray container 1, the liquid C can be compressed (accumulated) inside the spray head 4 by the stroke of the distance ΔL without using the pump 3 attached to the container body 2. Furthermore, according to the spray head 4, and therefore the liquid spray container 1, the seal of the through-flow path r4 is forcibly released by also utilizing the mechanical action of the lever member 13, thereby reducing the pressing load when pressing the spray head 4.

[0043] Therefore, the spray head 4, and by extension the liquid spray container 1, can provide a spray head and liquid spray container in which the pressing load during the pressing operation is reduced without changing the pump 3 attached to the container body 2.

[0044] In addition, according to the spray head 4, and by extension, the liquid spray container 1, the mechanism (pressure accumulation mechanism) that compresses (accumulates) the liquid C is disposed in the outflow path r3 extending in the front-to-back direction (lateral direction). In this case, the vertical height of the spray head is reduced compared to when the pressure accumulation mechanism is disposed in the vertical direction, thereby making it smaller in the vertical direction. Also, compared to when the pressure accumulation mechanism is disposed in the vertical direction, the vertical height of the spray head is reduced, thereby improving the grip of fingers on the spray head, resulting in improved operability.

[0045] In addition, according to the spray head 4, and therefore the liquid spray container 1, when the spray head 4 is released from being pressed down, the piston guide 9 moves forward again due to the biasing force of the second elastic member 12. At this time, since the second arm 13c of the lever member 13 is connected to the rear end portion 9e of the piston guide 9, the second arm 13c of the lever member 13 also moves forward together with the piston guide 9 due to the biasing force of the second elastic member 12. As a result, the through flow path r4 of the piston 8 is sealed again by the seal portion 9c of the piston guide 9 as shown in FIG. 1 (FIG. 2) after passing through the state of FIG. 3. As a result, according to the spray head 4, and therefore the liquid spray container 1, the spraying operation using the spray head 4 can be repeatedly performed.

[0046] In this embodiment, the head body 6 is provided with a nozzle 6g extending forward, and the spray unit 7 is disposed inside the nozzle 6g. In this case, by ensuring a larger compression volume (pressure storage volume) of the liquid C, the liquid C can be pumped to the spray unit 7 with greater force. Therefore, in this case, the liquid C can be sprayed with finer spray particles.

[0047] In this embodiment, the first elastic member 11 is supported on the piston guide 9 by a support tube 17 provided on the piston guide 9, and a communication passage r5 that connects the through-flow passage r4 to the sprayer 7 is provided between the piston guide 9 and the support tube 17, and the spray head 4 further includes an auxiliary tube 19 that slidably holds the support tube 17. In this case, centering of the piston guide 9 with respect to the axis O2 can be performed stably. Therefore, in this case, the liquid C can be sprayed smoothly.

[0048] The above is an exemplary embodiment of the present invention. Therefore, the present invention is not limited to the above embodiment and can be modified in various ways within the scope of the claims. For example, the spray head of the present invention is not limited to a spray head. Similarly, the liquid spray container of the present invention is not limited to a liquid spray container. The spray form of the spray head, and therefore the liquid spray container, can be not only a form that sprays the liquid in a mist, but also a form that sprays the liquid in a foam or a form that sprays the liquid in a single line. In other words, the spray portion is not limited to a spray portion. Furthermore, liquid C is not limited to cosmetics such as lotions and whitening agents for whitening. Examples of liquid C include fluorine coating agents for preventing tooth decay, medicines such as athlete's foot medicine, and seasonings for foods. [Explanation of symbols]

[0049] 1: liquid spray container (liquid jet container), 2: container body, 3: pump, 4: spray head (jet head), 5: base, 5a: base plate, 5b: guide peripheral wall, 5c: fitting cylinder, 5d: sliding cylinder, 6: head body, 6a: liquid passage pipe, 6b: top wall, 6c: outer peripheral wall, 6d: cylinder wall, 6e: rear wall, 6g: nozzle, 7: spray part (jet part), 8: piston, 8a: piston body, 8b: outer sliding part, 8c: inner sliding part, 9: piston guide, 9a: front part, 9b: rear part, 9c: seal part, 9d: support flange, 9e: rear end, 11: first elastic member, 12: second elastic member, 13: lever member, 14: inner step (step), 17: support cylinder, 17a: connecting piece, 17b: stopper protrusion, 18: support plate, 19: auxiliary cylinder, 21: outer step, 31: mounting cap, 32: cylinder, 33: piston, 34: piston guide, 35: coil spring, 39: stem, A3: lower end opening, A4: nozzle, r1: inlet passage, r2: fluid passage, r3: outlet passage, r4: through hole, r5: communication passage, r6: clearance passage, r7: swirl passage, S8: merging space,

Claims

1. A jetting head that can be attached to a pump disposed in a container body and that jets liquid in the container body toward a front side, the pump includes a base fixed to an upper end of the pump, a head body slidably held on the base, a jetting portion disposed on the front side of the head body and jetting the liquid, a piston having a through flow path and slidable in the front-rear direction inside the head body, a piston guide slidably passing through the through flow path, a first elastic member supported by the piston guide to urge the piston toward the rear, a second elastic member supported by the head body to urge the piston toward the front, and a lever member that moves the piston guide toward the rear when the head body is pressed down against the base, the head body has a step that restricts rearward movement of the piston by contact with the piston, The piston guide seals the through-flow passage by pressing the piston, and has a sealing portion that moves away from the piston after the piston contacts the step by moving the piston guide rearward relative to the piston by the lever member.

2. The head body includes a nozzle extending toward the front side, The jet head according to claim 1 , wherein the jet portion is disposed inside the nozzle.

3. the first elastic member is supported on the piston guide by a support cylinder provided in the piston guide, and a communication passage is provided between the piston guide and the support cylinder, which connects the through-flow passage to the jetting portion, The jet head according to claim 1 , further comprising an auxiliary cylinder that slidably holds the support cylinder.

4. A liquid ejection container comprising: a container body capable of containing a liquid; a pump attached to said container body; and the ejection head according to claim 1 attached to said pump.

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