Ejector

Abstract

To provide a discharger capable of preventing content liquid from entering a portion between a nozzle cylinder and a switch cylinder.SOLUTION: A discharger according to an embodiment relating to the present invention comprises: a pump provided with a nozzle cylinder in which a stem movably arranged downward to a mouth of a container body in which content liquid is stored in an upwardly energized state, and a discharge port opening forward are formed, and which extends forward from an upper end part of the stem; and a switch cylinder arranged coaxially with the nozzle cylinder. The switch cylinder is provided movably in a front-rear direction with respect to the nozzle cylinder between a first position where a front end edge of the switch cylinder is located in front of the discharge port and a second position where the front end edge of the switch cylinder is located behind the first position. A seal part for sealing a portion between the switch cylinder and the nozzle cylinder is arranged between an inner peripheral surface of the switch cylinder and an outer peripheral surface of the nozzle cylinder.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] A known dispenser configuration includes a stem that is biased upward and movable downward relative to the mouth of the container body, a nozzle cylinder that has a discharge port that opens forward and extends forward from the upper end of the stem, and a switching cylinder that is arranged coaxially with the nozzle cylinder and is movable back and forth relative to the nozzle cylinder (see, for example, Patent Document 1 below). In this type of dispenser, the discharge mode of the content dispensed from the discharge port is switched depending on the amount of forward projection of the switching cylinder relative to the nozzle cylinder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-196462 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, there is a possibility that the liquid content discharged from the discharge port may enter the gap between the nozzle tube and the switching tube. The liquid content that enters the gap between the nozzle tube and the switching tube flows along the outer surface of the nozzle tube to the stem side. As a result, the liquid content may adhere to the outer surface of the nozzle tube or the outer surface of the stem, and may adhere to the user's hands, etc.

[0005] The present invention provides a dispenser that can prevent the content liquid from entering between the nozzle cylinder and the switching cylinder. [Means for solving the problem]

[0006] In order to solve the above problems, the present disclosure employs the following aspects. A dispenser according to one aspect of the present disclosure comprises: a stem arranged in an upwardly biased state so as to be movable downward relative to the mouth of a container body in which the content liquid is contained; a nozzle tube having a nozzle opening forward and extending forward from the upper end of the stem, the pump discharging the content liquid from the nozzle through the stem as the stem moves downward; and a switching tube arranged coaxially with the nozzle tube and surrounding the nozzle tube, the switching tube being movable in the forward and backward directions relative to the nozzle tube between a first position in which the front edge of the switching tube is located forward of the nozzle outlet and a second position in which the front edge of the switching tube is located rearward of the first position, and switching the discharge mode of the content liquid discharged from the nozzle outlet between the first position and the second position, and a sealing portion being arranged between the inner surface of the switching tube and the outer surface of the nozzle tube to seal between the switching tube and the nozzle tube.

[0007] According to this aspect, by sealing the gap between the switching tube and the nozzle tube, it is possible to prevent the liquid content discharged from the discharge port from entering between the switching tube and the nozzle tube, thereby preventing the liquid content from adhering to the outer surface of the nozzle tube or the outer surface of the stem, and thus preventing the liquid content from adhering to the user's hands, etc.

[0008] In the dispenser according to the above aspect, it is preferable that the sealing portion is a protrusion that protrudes from the nozzle cylinder toward the switching cylinder and that is in close contact with an inner circumferential surface of the switching cylinder. According to this aspect, the switching cylinder can be moved more smoothly relative to the nozzle cylinder than when the sealing portion is provided on the movable switching cylinder. Also, unlike when the sealing portion is provided on the switching cylinder, the distance between the discharge port and the sealing portion in the front-to-rear direction does not change depending on the position of the switching cylinder relative to the nozzle cylinder. In other words, regardless of the position of the switching cylinder, the sealing position relative to the discharge port can always be maintained at a constant position, thereby stabilizing the sealing performance.

[0009] In the dispenser according to any of the above aspects, an engagement portion that protrudes toward the switching cylinder is formed in a portion of the nozzle cylinder that is located rearward of the sealing portion, and the switching cylinder is provided with a front regulating portion that abuts against the engagement portion from behind and regulates movement of the switching cylinder forward of the first position relative to the nozzle cylinder, and a rear regulating portion that abuts against the engagement portion from the front and regulates movement of the switching cylinder rearward of the second position relative to the nozzle cylinder, and it is preferable that the switching cylinder is configured to be movable relative to the nozzle cylinder with the front regulating portion in close proximity to or in abutment with the nozzle cylinder. According to this aspect, the switching cylinder can be stably moved back and forth relative to the nozzle cylinder, thereby improving the operability of the switching cylinder. [Effects of the Invention]

[0010] According to the present invention, it is possible to prevent the content liquid from entering between the nozzle cylinder and the switching cylinder. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a vertical cross-sectional view of the discharge container (initial state) according to the embodiment. [Figure 2] FIG. 2 is an enlarged vertical cross-sectional view showing a main part of the discharger (at the rearmost end position) according to the embodiment. [Figure 3] FIG. 2 is an enlarged horizontal-longitudinal cross-sectional view showing a main part of the discharger (at the rearmost end position) according to the embodiment. [Figure 4] FIG. 2 is a vertical cross-sectional view of the discharge container (discharge state) according to the embodiment. [Figure 5] FIG. 2 is an enlarged vertical cross-sectional view showing a main part of the dispenser (at the front end position) according to the embodiment. [Figure 6] FIG. 2 is an enlarged horizontal-longitudinal cross-sectional view showing a main part of the dispenser (at the front end position) according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a dispensing container in which a dispenser 10 is attached to a container body 2 will be described as an example. The discharge container 1 shown in FIG. 1 includes a cylindrical container body 2 with a bottom, and a dispenser 10 detachably attached to an opening 2a of the container body 2. The dispenser 10 includes an attachment cap 11 , a pump 12 , a support member 13 , a push-down member 14 , a stopper 15 , and a switching member 16 .

[0013] The pump 12 discharges the liquid content within the container body 2. The pump 12 is attached to the container body 2 via an attachment cap 11. The pump 12 includes a cylinder 21, a piston 22, a piston guide 23, a biasing member 24, a stem 25, and a discharge head 26.

[0014] Here, the mounting cap 11, cylinder 21, piston 22, piston guide 23, and stem 25 are formed into cylindrical shapes with their respective central axes positioned on a common axis. Hereinafter, the common axis will be referred to as the central axis O1, and the direction along the central axis O1 will be referred to as the up-down direction. A direction intersecting the central axis O1 when viewed from the up-down direction will be referred to as the radial direction, and a direction circumferential around the central axis O1 will be referred to as the circumferential direction. When viewed from the up-down direction, a direction intersecting the central axis O1 will be referred to as the front-rear direction L1, and a direction perpendicular to both the up-down direction and the front-rear direction L1 will be referred to as the left-right direction L2.

[0015] The cylinder 21 is formed in a multi-stage cylindrical shape with the outer diameter of the cylinder 21 decreasing as it moves downward. The cylinder 21 is supported by the attachment cap 11 while vertically penetrating the attachment cap 11. A ball valve (not shown) is provided at the opening at the lower end of the cylinder 21. The ball valve is a check valve that blocks communication between the inside of the container body 2 and the inside of the cylinder 21 when the inside of the cylinder 21 is pressurized, and allows communication between the inside of the container body 2 and the inside of the cylinder 21 when the inside of the cylinder 21 is depressurized.

[0016] The piston 22 is provided so as to be able to move up and down within the cylinder 21. The piston 22 is formed in a double-cylinder shape, including an outer cylinder piston 22a and an inner cylinder piston 22b. The outer cylinder piston 22a and the inner cylinder piston 22b are connected via a connecting portion 22c at their vertical center portions. The outer cylinder piston 22a is fitted within the cylinder 21. When the piston 22 moves up and down relative to the cylinder 21, the outer cylinder piston 22a slides closely on the inner circumferential surface of the cylinder 21.

[0017] The piston guide 23 is provided so as to be able to move up and down within the cylinder 21. The piston guide 23 includes a guide cylinder 23a, a closing portion 23b, and a spring support portion 23c. The guide tube 23a passes through the inner-cylindrical piston 22b in the vertical direction. The upper end of the guide tube 23a protrudes above the cylinder 21. The lower end of the guide tube 23a is formed with an expanded diameter portion 23d whose outer diameter gradually increases as it extends downward. The lower end of the inner-cylindrical piston 22b abuts against the expanded diameter portion 23d. The piston guide 23 is configured so that the inner-cylindrical piston 22b can move up and down relative to the piston 22 while sliding on the expanded diameter portion 23d.

[0018] A lower communication hole 23e is formed in a portion of the guide tube 23a located above the expanded diameter portion 23d. The lower communication holes 23e are formed in a pair at positions facing each other in the radial direction of the guide tube 23a. The lower communication holes 23e communicate between the inside of the guide tube 23a and the inside of the cylinder 21. An upper communication hole 23f is formed in a portion of the guide tube 23a located above the lower communication hole 23e. The upper communication holes 23f are formed in a pair at positions facing each other in the radial direction of the guide tube 23a. The lower communication hole 23e communicates the inside of the guide tube 23a with the inside of the stem 25.

[0019] The closing portion 23b closes the lower end opening of the guide tube 23a and protrudes radially outward from the guide tube 23a. The spring support portion 23c protrudes downward from the closing portion 23b.

[0020] The biasing member 24 biases the stem 25 upward via the piston guide 23. The biasing member 24 is interposed between the piston guide 23 and the cylinder 21. The lower end of the biasing member 24 is supported by the lower end of the cylinder 21. The upper end of the biasing member 24 is supported from above by the outer circumferential portion of the closing portion 23b with the spring support portion 23c inserted.

[0021] The stem 25 is arranged to be downwardly movable while being biased upward relative to the mouth portion 2a. The stem 25 is formed in a multi-stage cylindrical shape with the outer diameter increasing toward the lower stage. The upper end of the guide tube 23a is fitted into the stem 25 from below. This allows the stem 25 and the piston guide 23 to move together. The lower end of the stem 25 is inserted between the outer cylindrical piston 22a and the inner cylindrical piston 22b. An elastic piece 31 is formed at the lower end of the stem 25. A plurality of elastic pieces 31 are provided at intervals in the circumferential direction. The elastic piece 31 is configured to be elastically deformable in the radial direction.

[0022] The ejection head 26 includes a mounting tube portion 32 and a nozzle tube 33 . The mounting tube portion 32 is formed in a topped cylindrical shape and is arranged coaxially with the central axis O1. The mounting tube portion 32 is fitted into the stem 25 from above the stem 25. The interior of the mounting tube portion 32 communicates with the interior of the guide tube 23a through the interior of the stem 25. An engagement protrusion 32a is formed on the upper end of the mounting tube portion 32, protruding on both sides in the left-right direction L2.

[0023] The nozzle cylinder 33 extends from the upper end of the mounting cylinder portion 32 to one side in the front-rear direction L1 (hereinafter referred to as the front). A discharge port 33a that opens forward is formed at the front end of the nozzle cylinder 33. In the following description, the central axis of the nozzle cylinder 33 is referred to as the nozzle axis O2, and the direction along the nozzle axis O2 is referred to as the nozzle axial direction. A direction intersecting the nozzle axis O2 as viewed from the nozzle axial direction is referred to as the nozzle radial direction, and a direction circumferential around the nozzle axis O2 is referred to as the nozzle circumferential direction. It is sufficient that the nozzle axis O2 has at least a component in the front-rear direction L1. In this embodiment, the nozzle axis O2 extends upward as it moves forward.

[0024] The support member 13 is provided above the mounting cap 11. The support member 13 includes a support tube 41 and an extension portion . The support cylinder 41 is disposed coaxially with the central axis O1. The support cylinder 41 is attached to the upper end of the cylinder 21. The support cylinder 41 restricts the upward movement of the piston 22 and guides the up and down movement of the stem 25. The extension portion 42 extends from the support tube 41 to the other side in the front-rear direction L1 (hereinafter referred to as the rear). Specifically, the extension portion 42 extends upward as it extends rearward. A shaft portion 42a that protrudes outward in the left-right direction L2 is provided at the rear end of the extension portion 42.

[0025] The push-down member 14 is attached to the extension portion 42 via a shaft portion 42a. The push-down member 14 is supported by the extension portion 42 so as to be rotatable about an axis P1 that passes through the center of the shaft portion 42a and extends along the left-right direction L2. The push-down member 14 straddles the upper part of the mounting tube portion 32 in the front-rear direction L1, and then extends downward. A through-hole 14a is formed in the push-down member 14 at a portion that overlaps with the nozzle tube 33 when viewed from the front-rear direction L1. The nozzle tube 33 protrudes forward further than the push-down member 14 through the through-hole 14a. Therefore, the push-down member 14 straddles the nozzle tube 33 downward and extends downward further than the nozzle tube 33.

[0026] A protrusion support portion 14b is formed in a portion of the pusher member 14 that is located rearward of the through-hole 14a. The protrusion support portions 14b are arranged on both sides of the mounting tube portion 32 in the left-right direction L2. Each protrusion support portion 14b engages with the corresponding engagement protrusion 32a from above the engagement protrusion 32a. When the pusher member 14 rotates downward about the axis P1, it presses the engagement protrusion 32a downward via the protrusion support portion 14b. As a result, the piston 22, piston guide 23, and stem 25 are pressed downward against the biasing force of the biasing member 24.

[0027] The stopper 15 is configured to be movable between a restricting position (see FIG. 1) that restricts the downward movement of the discharge head 26 and a non-restricting position (see FIG. 4) that allows the downward movement of the discharge head 26. The stopper 15 includes a shaft body 15a, a side wall portion 15b, and a restricting portion 15c. The shaft 15a is supported at the front end of the extension 42 so as to be rotatable about an axis P2 extending in the left-right direction L2. Therefore, the stopper 15 is configured to be rotatable about the axis P2 between the restricting position and the releasing position. The side wall portions 15b extend upward from both ends of the shaft body 15a in the left-right direction L2.

[0028] The restricting portion 15c bridges the upper ends of the side wall portions 15b. The restricting portion 15c is formed in a semi-cylindrical shape coaxial with the central axis O1. When the stopper 15 is in the restricting position, the restricting portion 15c fits into a portion of the stem 25 located above the support tube 41 from the rear of the stem 25. As a result, the restricting portion 15c is positioned between the upper edge of the support tube 41 and a protrusion 46 protruding rearward from the nozzle tube 33. When the stopper 15 is in the restricting position, the protrusion 46 abuts against the restricting portion 15c from above, thereby restricting downward movement of the ejection head 26 relative to the support member 13. The restricting portion 15c rotates rearward about the axis P2 as the stopper 15 moves from the restricting position to the released position. When the stopper 15 is in the unrestricted position, the restricting portion 15c retreats rearward from between the support tube 41 and the protruding portion 46, thereby allowing the ejection head 26 to move downward relative to the support member 13.

[0029] 2 and 3, the switching member 16 is provided so as to be slidable in the front-rear direction L1 (nozzle axis direction) relative to the nozzle cylinder 33. The switching member 16 includes a switching cylinder 51, an exterior part 52 (see FIG. 2), and an operating part 53 (see FIG. 3). The switching cylinder 51 is disposed coaxially with the nozzle axis O2. The nozzle cylinder 33 is inserted into the switching cylinder 51. Therefore, the switching cylinder 51 surrounds the nozzle cylinder 33. The front end of the switching cylinder 51 passes through the through-hole 14a in the front-rear direction L1.

[0030] The switching tube 51 is formed in a stepped shape with an inner diameter that decreases toward the front. Specifically, the switching tube 51 has a small diameter portion 51a located in the front and a large diameter portion 51b located behind the small diameter portion 51a. The inner peripheral surface of the small diameter portion 51a is formed to be a smooth surface.

[0031] The large diameter portion 51b is formed with a front locking portion 55 and a rear locking portion 56. Each of the locking portions 55, 56 protrudes inward in the nozzle radial direction from the large diameter portion 51b and extends in the nozzle circumferential direction. When the switching cylinder 51 is in the rearmost position (second position, mist discharge position), the front locking portion 55 locks onto an overhanging protrusion 58 formed on the nozzle cylinder 33 from behind the overhanging protrusion 58. The overhanging protrusion 58 protrudes outward from the nozzle cylinder 33 in the nozzle radial direction and extends in the nozzle circumferential direction. The front locking portion 55 moves forward over the overhanging protrusion 58 as the switching cylinder 51 moves forward from the rearmost position. The rear locking portion 56 is located rearward of the front locking portion 55. When the switching tube 51 is in the frontmost position (first position, foam discharging position), the rear locking portion 56 is locked to the over-stepping protrusion 58 from in front of the over-stepping protrusion 58. The rear locking portion 56 moves forward over the over-stepping protrusion 58 as the switching tube 51 moves forward from the frontmost position.

[0032] As shown in FIG. 3, guide grooves 60 are formed at the rear of the switching barrel 51 at positions facing each other in the left-right direction L2. The guide grooves 60 are recessed outward in the left-right direction L2 with respect to the inner circumferential surface of the switching barrel 51. The guide grooves 60 extend linearly in the front-rear direction L1. The rear end of the guide groove 60 reaches the rear edge of the switching barrel 51. A first engagement claw (front restriction portion) 61 is formed at the rear end of the guide groove 60, protruding inward in the left-right direction L2 from the inner surface of the guide groove 60. The first engagement claw 61 extends forward as it moves inward in the left-right direction L2.

[0033] A rail portion 63 of the nozzle cylinder 33 is housed inside each guide groove 60. The rail portion 63 protrudes outward in the left-right direction L2 from the outer circumferential surface of the nozzle cylinder 33 and extends linearly in the front-rear direction L1. A second engagement claw (engagement portion) 64 is formed at the front end of each rail portion 63. The second engagement claw 64 protrudes outward in the left-right direction L2 from the rail portion 63. The rail portion 63 moves within the guide groove 60 when the switching cylinder 51 slides relative to the nozzle cylinder 33, thereby guiding the sliding movement of the switching cylinder 51. At this time, the switching cylinder 51 slides relative to the nozzle cylinder 33 with the first engagement claw 61 approaching or abutting the rail portion 63 from the outside in the left-right direction L2.

[0034] When the switching cylinder 51 is at the frontmost position (see FIGS. 5 and 6), the first engagement claw 61 abuts against the second engagement claw 64 from behind the second engagement claw 64. This restricts forward movement of the switching cylinder 51 relative to the nozzle cylinder 33. On the other hand, when the switching cylinder 51 is at the rearmost position, the front-end inner surface (rear restriction portion) 60a of the guide groove 60 abuts against the second engagement claw 64 from in front of the second engagement claw 64. This restricts rearward movement of the switching cylinder 51 relative to the nozzle cylinder 33. In this embodiment, the front end edge of the switching cylinder 51 is located forward of the discharge port 33a when the switching cylinder 51 is at both the frontmost position and the rearmost position.

[0035] 2 and 3, outside air introduction portions 65 are formed in the front portion of the switching cylinder 51 at positions facing each other in the left-right direction L2 (nozzle radial direction). The outside air introduction portions 65 are formed in the shape of slits that penetrate the switching cylinder 51 in the nozzle radial direction and whose longitudinal direction is the nozzle circumferential direction. The outside air introduction portions 65 are located forward of the nozzle cylinder 33 when the switching cylinder 51 is in the frontmost position, and are located rearward of the nozzle cylinder 33 when the switching cylinder 51 is in the rearmost position.

[0036] The exterior part 52 protrudes in all directions from the switching cylinder 51. When the switching cylinder 51 is in the rearmost position, the exterior part 52 extends along the outer surface of the pressing member 14. When the switching member 16 is in the rearmost position, the portion of the through-hole 14a that is located around the nozzle cylinder 33 is closed by the exterior part 52. The operating portion 53 protrudes on both sides in the left-right direction L2 from the exterior portion 52. The operating portion 53 functions as a finger hook when operating the switching member 16.

[0037] Here, a seal portion 67 is formed at the front end of the nozzle cylinder 33. The seal portion 67 is a protrusion that protrudes outward from the nozzle cylinder 33 in the nozzle radial direction. The seal portion 67 extends around the entire circumference of the nozzle cylinder 33 in the nozzle circumferential direction. When the switching member 16 is at least at the discharge positions of the frontmost end position and the rearmost end position, the seal portion 67 comes into close contact with the inner circumferential surface of the small diameter portion 51a, thereby sealing the nozzle cylinder 33 and the switching cylinder 51. Furthermore, the seal portion 67 slides closely against the inner circumferential surface of the small diameter portion 51a during the process of moving between the frontmost end position and the rearmost end position. Therefore, at the portion where the seal portion 67 comes into close contact with the inner circumferential surface of the small diameter portion 51a, the nozzle cylinder 33 and the switching cylinder 51 are sealed even during the stroke (sliding) of the switching member 16 moving between the frontmost end position and the rearmost end position. The sealing during the stroke of the switching member 16 may be performed constantly over the entire stroke or may be performed for a part of the entire stroke.

[0038] Next, a description will be given of how to use the discharge container 1. In the following description, the initial state will be described as a state in which the stopper 15 is in the restricting position and the switching member 16 is in the rearmost position as shown in FIG. To discharge the content liquid from the discharge container 1, the stopper 15 is moved to the unrestricted position as shown in Fig. 4. Specifically, the stopper 15 is rotated rearward about the axis P2. Then, the restricting portion 15c retreats rearward from between the support tube 41 and the protruding portion 46. This moves the stopper 15 to the unrestricted position, allowing the discharge head 26 to move downward relative to the support tube 41.

[0039] Next, to dispense the liquid contents in a mist, while keeping the switching member 16 in the rearmost position, place your finger on the front end of the pusher member 14 and pull the pusher member 14 backward. This causes the pusher member 14 to rotate about the axis P1, pressing the dispense head 26 downward via the protrusion support portion 14b and the engaging protrusion 32a. As a result, the dispense head 26, stem 25, and piston guide 23 move downward relative to the cylinder 21, with the ball valve closing the lower end opening of the cylinder 21.

[0040] When the stem 25 moves downward together with the piston guide 23, the elastic piece 31 is elastically deformed between the stem 25 and the connecting portion 22c, and the stem 25 and the piston guide 23 move downward relative to the piston 22. As a result, the expanded diameter portion 23d moves downward away from the inner-cylinder piston 22b, and the inside of the cylinder 21 and the inside of the stem 25 communicate with each other through the gap between the inner-cylinder piston 22b and the guide cylinder 23a. As a result, the liquid content in the cylinder 21 rises inside the stem 25 and is introduced into the nozzle cylinder 33. The liquid content introduced into the nozzle cylinder 33 is discharged forward in a mist form through the discharge port 33a.

[0041] Next, to discharge the content liquid in a foamy form, the switching member 16 is moved to the rearmost position. Specifically, as shown in FIGS. 5 and 6 , the switching member 16 is pulled forward via the operating unit 53. As a result, the switching member 16 moves forward relative to the nozzle cylinder 33 while the front locking portion 55 and the rear locking portion 56 move forward over the over-riding protrusion 58. Then, when the first engaging claw 61 abuts against the second engaging claw 64 from behind, the switching member 16 reaches the frontmost position. At this time, the outside air introduction portion 65 communicates the inside and outside of the switching cylinder 51 in the nozzle radial direction in front of the nozzle cylinder 33.

[0042] In this state, when the push-down member 14 is pulled rearward as described above, the liquid content introduced into the nozzle cylinder 33 through the stem 25 is discharged forward in a mist form through the discharge port 33a. When the switching member 16 is in the forwardmost position and the liquid content is discharged from the discharge port, the internal space of the switching cylinder 51 in front of the nozzle cylinder 33 becomes negative pressure. As a result, outside air is introduced into the internal space of the switching cylinder 51 through the outside air inlet 65. As a result, the liquid content discharged in a mist form mixes with the outside air introduced into the internal space of the switching cylinder 51 inside the switching cylinder 51 and foams upon impact with the inner circumferential surface of the switching cylinder 51, etc. As a result, the liquid content is discharged forward from the switching cylinder 51 in a foamy form.

[0043] To return the dispenser 10 to its initial state after discharging the liquid content, the switching member 16 is pushed rearward to move it to its rearmost position. The switching member 16 moves rearward relative to the nozzle tube 33 while the front locking portion 55 and the rear locking portion 56 move rearward over the overriding protrusion 58. When the front inner surface 60a of the guide groove 60 abuts against the second engaging claw 64 from behind, the switching member 16 reaches its rearmost position. Thereafter, the stopper 15 is rotated upward about the axis P2, so that the restricting portion 15c is disposed between the support cylinder 41 and the protruding portion 46. As a result, the stopper 15 reaches the restricting position.

[0044] Here, in this embodiment, a sealing portion 67 is arranged between the inner surface of the switching tube 51 and the outer surface of the nozzle tube 33, which seals between the switching tube 51 and the nozzle tube 33 while the switching tube 51 moves between the rearmost position and the frontmost position. According to this configuration, by sealing the gap between the switching tube 51 and the nozzle tube 33, it is possible to prevent the liquid content discharged from the discharge port 33a from entering between the switching tube 51 and the nozzle tube 33. This prevents the liquid content from adhering to the outer peripheral surface of the nozzle tube 33 or the outer peripheral surface of the stem 25, and thus prevents the liquid content from adhering to the user's hands, etc.

[0045] In this embodiment, the seal portion 67 is configured as a protrusion that protrudes from the nozzle cylinder 33 toward the switching cylinder 51 and is in close contact with the inner circumferential surface of the switching cylinder 51. According to this configuration, compared to when a seal portion is provided on the movable switching cylinder 51, the switching cylinder 51 can be moved more smoothly relative to the nozzle cylinder 33. Furthermore, unlike when a seal portion is provided on the switching cylinder 51, the distance between the discharge port 33a and the seal portion 67 in the front-to-rear direction L1 (nozzle axial direction) does not change depending on the position of the switching cylinder 51 relative to the nozzle cylinder 33. In other words, regardless of the position of the switching cylinder 51, the seal position relative to the discharge port 33a can always be maintained at a constant position, thereby stabilizing the sealing performance.

[0046] In this embodiment, the switching cylinder 51 is configured to be movable relative to the nozzle cylinder 33 with the first engagement claw 61 in proximity to or in contact with the nozzle cylinder 33 (rail portion 63). According to this configuration, the switching cylinder 51 can be stably moved back and forth relative to the nozzle cylinder 33. This improves the operability of the switching cylinder 51.

[0047] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible within the scope of the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the appended claims. In the above-described embodiment, a configuration in which the sealing portion is formed on the nozzle cylinder 33 has been described, but the present invention is not limited to this configuration. The sealing portion may be provided on the switching cylinder 51, or may be provided separately from the nozzle cylinder 33 and the switching cylinder 51, as long as the sealing portion is provided between the nozzle cylinder 33 and the switching cylinder 51. In the above embodiment, the ejection head 26 is moved downward via the pressing member 14, but the present invention is not limited to this configuration. The ejection head 26 may be configured to be directly operated. In the above-described embodiment, the switching cylinder 51 is configured to have the outside air introduction portion 65, but the present invention is not limited to this configuration. The switching cylinder 51 may be configured without the outside air introduction portion 65. In the above-described embodiment, the switching member 16 moves back and forth relative to the nozzle cylinder 33 while the first engagement claw 61 is in proximity to or in contact with the rail portion 63 of the nozzle cylinder 33. However, the present invention is not limited to this configuration. The first engagement claw 61 may be in proximity to or in contact with the outer peripheral surface of the nozzle cylinder 33.

[0048] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0049] 2: Container body 2a: Mouth 10:Dispenser 12: Pump 25: Stem 33: Nozzle tube 33a: Discharge port 51: Switching tube 60a: Front end inner surface (rear regulating part) 61: First engaging claw (forward restricting portion) 64: Second engagement claw (engagement portion) 67: Seal part

Claims

1. a pump having a stem that is biased upward and movable downward relative to the opening of a container body in which the liquid content is accommodated, and a nozzle tube that extends forward from the upper end of the stem and is formed with a discharge port that opens forward, and which discharges the liquid content from the discharge port through the stem as the stem moves downward; a push-down member that operates the stem and that has a through-hole through which the nozzle cylinder passes; a switching cylinder that is arranged coaxially with the nozzle cylinder so as to penetrate the through hole in the front-rear direction and surrounds the nozzle cylinder, the switching cylinder is provided so as to be movable in a front-rear direction relative to the nozzle cylinder between a first position where a front end edge of the switching cylinder is located forward of the discharge port and a second position where a front end edge of the switching cylinder is located rearward of the first position, and a discharge mode of the content liquid discharged from the discharge port is switched between the first position and the second position; a seal portion that seals between the switching cylinder and the nozzle cylinder is disposed between an inner peripheral surface of the switching cylinder and an outer peripheral surface of the nozzle cylinder; The switching tube is provided with an exterior portion that extends up, down, left, and right from the switching tube and, in the second position, extends along the outer surface of the pressing member to close the through hole.

2. The dispenser according to claim 1, wherein the sealing portion is a protrusion that protrudes from the nozzle cylinder toward the switching cylinder and is in close contact with an inner circumferential surface of the switching cylinder.

3. an engaging portion that protrudes toward the switching cylinder is formed in a portion of the nozzle cylinder that is located rearward of the sealing portion; The switching cylinder is a front restriction portion that abuts against the engagement portion from behind and restricts movement of the switching cylinder forward of the first position relative to the nozzle cylinder; a rear restriction portion that abuts against the engagement portion from the front and restricts movement of the switching cylinder rearward beyond the second position relative to the nozzle cylinder, 3. The discharger according to claim 1, wherein the switching cylinder is configured to be movable relative to the nozzle cylinder in a state where the front regulating portion is in proximity to or in contact with the nozzle cylinder.

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