Ejector

Abstract

To provide a dispenser whose usability is good even if the discharge amount is increased.SOLUTION: A dispenser 1 can accumulate and discharge content 3 in a container body 2, the dispenser 1 has: a first cylinder 6; a first piston 7 vertically slidable on the first cylinder 6; a second cylinder 8 attached to the mouth part 2a of the container body 2; a second piston 9 vertically slidable on the second cylinder 8; a pump chamber 10 defined by the first cylinder 6, the first piston 7, the second cylinder 8 and the second piston 9; a holding member 11 capable of moving vertically with respect to the first cylinder 6 with the first piston 7 and vertically operable with respect to the second cylinder 8 with the first cylinder 6 and the second piston 9 by external operation; an internal flow path 14 that discharges content 3 in the pump chamber 10 to the outside from a discharge port 14a through the holding member 11 in response to the vertical movement of the holding member 11; and an energizing member 17 that energizes the holding member 11 upward with respect to the second cylinder 8.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] A dispenser attached to a container body for accumulating and discharging contents, comprising a cylinder, a piston slidable on the cylinder, a holding member operable with the piston relative to the cylinder by an external operation, a pump chamber defined by the cylinder and the piston, and an internal flow path for discharging the contents in the pump chamber to the outside through the holding member in response to the operation of the holding member, is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional dispenser having a pressure accumulation mechanism, when increasing the discharge (spray) amount, the stroke of the cylinder becomes longer and the pressing operation becomes heavier, resulting in problems in usability.

[0005] Therefore, an object of the present invention is to provide a dispenser with good usability even when the discharge amount is increased.

Means for Solving the Problems

[0006] The ejector of the present invention is an ejector that is attached to a container body and can accumulate and eject the contents inside the container body, and includes a first cylinder extending along a central axis, a first piston slidable in the vertical direction along the central axis on the first cylinder, a second cylinder attached to the mouth of the container body, a second piston slidable in the vertical direction on the second cylinder, a pump chamber defined by the first cylinder, the first piston, the second cylinder, and the second piston, and a holding member operable in the vertical direction with the first piston relative to the first cylinder and operable in the vertical direction with the first cylinder and the second piston relative to the second cylinder by an external operation, an internal flow path for discharging the contents in the pump chamber to the outside through the holding member in response to the vertical movement of the holding member, and a biasing member for biasing the holding member upward relative to the second cylinder. The biasing member includes a compression spring that is expandable and contractible in the vertical direction, and a connecting body that connects the upper end portion of the compression spring to the holding member so as to be movable in the vertical direction integrally with the holding member. The connecting body includes an engaging cylinder centered on the central axis, and an inward convex portion extending radially inward from the upper end portion of the engaging cylinder. The inward convex portion is fitted to the holding member so as to be operable in the vertical direction integrally with the holding member with respect to the second cylinder. It is an ejector.

[0008] In the ejector of the present invention, in the above configuration, it is preferable that the ejector is such that the holding member can push down the first cylinder via the connecting body in a state where the holding member is at the lower limit position with respect to the first cylinder.

[0009] In the ejector of the present invention, in the above configuration, it is preferable that the ejector is such that the biasing member can bias the first cylinder upward via the engaging portion between the connecting body and the first cylinder.

[0011] In the ejector of the present invention, in the above configuration, the holding member has a cylindrical stem extending in the vertical direction and a piston guide attached to the inner peripheral surface of the stem, the first piston has an elastic cylindrical portion surrounding the outer peripheral surface extending in the vertical direction of the piston guide, a part of the internal flow path is defined by the inner peripheral surface of the elastic cylindrical portion and the outer peripheral surface of the piston guide, and it is preferable that the ejector is such that the internal flow path blocked by the contact between the inner peripheral surface of the elastic cylindrical portion and the outer peripheral surface of the piston guide is opened when the elastic cylindrical portion is elastically deformed radially outward by the accumulation in the pump chamber.

[0012] In the above-described configuration, the ejector of the present invention is preferably an ejector in which the first cylinder has a reduced-diameter cylindrical portion that gradually reduces in diameter downward, the piston guide has an elastic piece that extends downward, and the elastic piece is elastically deformed radially inward by being pressed downward against the inner peripheral surface of the reduced-diameter cylindrical portion, thereby allowing the holding member to move downward with respect to the first cylinder, and the holding member is moved upward with respect to the first cylinder by restoration deformation.

[0013] In the above-described configuration, the ejector of the present invention is preferably an ejector that discharges the content in a mist form from the discharge port.

Advantages of the Invention

[0014] According to the present invention, it is possible to provide an ejector with good usability even when the discharge amount is increased.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be illustrated and described with reference to the drawings.

[0017] In the first embodiment of the present invention shown in Figs. 1 to 3, the discharger 1 is attached to the container body 2 and can store and discharge the content 3 in the container body 2. In this embodiment, the discharge container 4 is composed of the discharger 1, the container body 2, and the upper lid 5.

[0018] The discharger 1 includes a first cylinder 6, a first piston 7, a second cylinder 8, a second piston 9, a pump chamber 10 (a first chamber 10a, a second chamber 10b), a holding member 11 (a stem 12, a piston guide 13), an internal flow path 14, a first retaining member 15, a second retaining member 16, a biasing member 17, a first outflow suppressing portion 18 (a valve body 19, a reduced-diameter cylindrical portion 6a of the first cylinder 6), a first inflow suppressing portion 20 (a seating portion of the first piston 7, a seated portion of the piston guide 13), a second outflow suppressing portion 21 (a valve member 22, an outer peripheral portion of the suction port 8a), a pressure accumulating mechanism 23 (an elastic cylindrical portion 7a of the first piston 7, the piston guide 13), a mounting cap 24, and a nozzle head 25 (a head body 25a, a nozzle tip 25b).

[0019] The pump chamber 10 is partitioned by a first cylinder 6, a first piston 7, a second cylinder 8, and a second piston 9. The pump chamber 10 also has a first chamber 10a partitioned by the first cylinder 6 and the first piston 7, and a second chamber 10b partitioned by the second cylinder 8 and the second piston 9. The holding member 11 has a stem 12 and a piston guide 13. The internal flow path 14 has a flow path between the first piston 7 and the piston guide 13, a flow path between the stem 12 and the piston guide 13, a flow path inside the stem 12 above the piston guide 13, a flow path inside the nozzle head 25, and a discharge port 14a. The first outflow suppression portion 18 has a reduced-diameter cylinder portion 6a of the first cylinder 6 and a valve body 19. The first inflow suppression portion 20 has a seating portion of the first piston 7 and a seated portion of the piston guide 13. The second outflow suppression portion 21 has a valve member 22 and an outer peripheral portion of the suction port 8a. The pressure accumulation mechanism 23 has an elastic cylinder portion 7a of the first piston 7 and the piston guide 13. The nozzle head 25 has a head body 25a and a nozzle tip 25b. The nozzle tip 25b has a discharge port 14a. The biasing member 17 has a compression spring 17a, a connecting body 17b, and a lower end member 17c.

[0020] The first cylinder 6, the first piston 7, the second cylinder 8, the second piston 9, the stem 12, the piston guide 13, the first retaining member 15, the second retaining member 16, the biasing member 17, and the valve member 22 are made of resin, for example.

[0021] The container body 2 has a cylindrical mouth portion 2a extending along the central axis O of the first cylinder 6, a body portion 2b connected to the lower end of the mouth portion 2a, and a bottom portion connected to the lower end of the body portion 2b. Note that the mouth portion 2a may have a configuration other than a cylindrical shape, such as a rectangular tube shape. A liquid content 3 is accommodated in the container body 2.

[0022] For convenience of explanation, the direction along the central axis O is also referred to as the vertical direction, the direction from the body portion 2b toward the mouth portion 2a along the vertical direction is also referred to as the upward direction, the opposite direction is also referred to as the downward direction, the direction along a straight line orthogonal to the central axis O is also referred to as the radial direction, the direction around the central axis O is also referred to as the circumferential direction, and a cross section including the central axis O is also referred to as a longitudinal section.

[0023] The second cylinder 8 has a larger diameter than the first cylinder 6, has a suction port 8a, and is attached to the mouth portion 2a by attaching a mounting cap 24 to the mouth portion 2a. Further, the second cylinder 8 has a cylindrical shape centered on the central axis O and is in contact with the second piston 9, a second cylinder main body 8b, a flange 8c that extends radially outward from the upper portion of the second cylinder main body 8b and is disposed on the upper end surface of the mouth portion 2a via a packing, and a bottom wall 8d that extends radially inward from the lower portion of the second cylinder main body 8b and has a suction port 8a. The mounting cap 24 has a peripheral wall 24a attached to the outer peripheral surface of the mouth portion 2a, an annular wall 24b that extends radially inward from the upper portion of the peripheral wall 24a and abuts on the upper surface of the flange 8c, and a guide wall 24c that extends upward from the annular wall 24b and has a cylindrical shape centered on the central axis O.

[0024] The second outflow prevention portion 21 is formed by a valve member 22 disposed in the second chamber 10b and the outer peripheral portion of the suction port 8a. When the valve member 22 is separated from the outer peripheral portion of the suction port 8a, the movement of the content 3 from the container main body 2 into the second chamber 10b is allowed, while when the valve member 22 seats on the outer peripheral portion of the suction port 8a, the movement of the content 3 in the reverse direction is suppressed. The valve member 22 is configured as an elastic valve that can be separated from the outer peripheral portion of the suction port 8a by elastic deformation.

[0025] The second piston 9 has an annular shape centered on the central axis O and has a second sliding cylinder 9a and a cylinder shaft 9b. The second sliding cylinder 9a constitutes the outer peripheral edge portion of the second piston 9 and is slidable in the vertical direction on the inner peripheral surface of the second cylinder main body 8b. The cylinder shaft 9b constitutes the radially inner peripheral edge portion of the second piston 9, has a cylindrical shape extending in the vertical direction, the lower end portion of the cylinder shaft 9b is integrally formed with the second sliding cylinder 9a, and the upper end portion of the cylinder shaft 9b is integrally formed with the lower portion of the first cylinder 6.

[0026] The second retaining member 16 has an annular shape centered on the central axis O and has a second retaining portion 16a and a receiving portion 16b. The second retaining portion 16a has a tubular shape extending in the vertical direction and is arranged along the inner peripheral surface of the second cylinder main body 8b. Further, on the outer peripheral surface of the second retaining portion 16a, a retaining convex portion 16c that protrudes radially outward and is held between the flange 8c and the annular wall 24b is provided. The lower end portion of the second retaining portion 16a abuts against the upper end portion of the second sliding cylinder 9a that moves upward with respect to the second cylinder 8, so that the upward movement of the second sliding cylinder 9a can be restricted. The receiving portion 16b receives and supports the lower end member 17c of the biasing member 17 from below. The receiving portion 16b has a support portion 16d and a guide cylinder 16e. The support portion 16d extends radially inward from the second retaining portion 16a and abuts against the lower surface of the lower end member 17c of the biasing member 17. The guide cylinder 16e has a tubular shape extending upward from the inner peripheral edge portion of the support portion 16d, and the cylinder axis 9b of the second piston 9 can be guided vertically by the inner peripheral surface of the guide cylinder 16e during the vertical movement of the second piston 9 with respect to the second cylinder 8.

[0027] The first cylinder 6 extends along the central axis O and has a first cylinder main body 6b and a reduced-diameter cylinder portion 6a. The first cylinder main body 6b has a tubular shape centered on the central axis O and contacts the first piston 7. The reduced-diameter cylinder portion 6a gradually reduces in diameter downward from the lower end portion of the first cylinder main body 6b. A spherical valve body 19 is disposed on the reduced-diameter cylinder portion 6a so as to be seatable, and the reduced-diameter cylinder portion 6a and the valve body 19 constitute a first outflow suppression portion 18. The first outflow suppression portion 18 allows the movement of the content 3 from the second chamber 10b to the first chamber 10a while suppressing the movement in the reverse direction.

[0028] The holding member 11 can be operated vertically with the first piston 7 with respect to the first cylinder 6 and vertically with the first cylinder 6 and the second piston 9 with respect to the second cylinder 8 by an external operation via the nozzle head 25. Further, the holding member 11 has a tubular stem 12 extending in the vertical direction centered on the central axis O and a piston guide 13 attached to the inner peripheral surface of the stem 12. The piston guide 13 extends in the vertical direction centered on the central axis O and has a rod shape that expands in diameter at the lower end portion.

[0029] The first piston 7 forms an annular shape centered on the central axis O and has a first sliding cylinder 7b and an elastic cylinder portion 7a. The first sliding cylinder 7b constitutes the outer peripheral edge portion of the first piston 7 and is slidable in the vertical direction on the inner peripheral surface of the first cylinder main body 6b. The elastic cylinder portion 7a forms a cylindrical shape extending in the vertical direction centered on the central axis O, and the lower end portion of the elastic cylinder portion 7a is continuous with the first sliding cylinder 7b. The elastic cylinder portion 7a surrounds the outer peripheral surface of the piston guide 13 extending in the vertical direction and is movable in the vertical direction with respect to the piston guide 13. A part of the internal flow path 14 is partitioned by the inner peripheral surface of the elastic cylinder portion 7a and the outer peripheral surface of the piston guide 13, and the internal flow path 14 blocked by the contact between the inner peripheral surface of the elastic cylinder portion 7a and the outer peripheral surface of the piston guide 13 is opened when the elastic cylinder portion 7a is elastically deformed radially outward by the accumulated pressure in the pump chamber 10. That is, the accumulator mechanism 23 is constituted by the elastic cylinder portion 7a of the first piston 7 and the piston guide 13. According to the accumulator mechanism 23, the content 3 can be vigorously discharged (sprayed) from the discharge port 14a, and the occurrence of dripping from the discharge port 14a can also be suppressed.

[0030] The lower end portion of the elastic cylinder portion 7a has a seating portion that can be seated on the seated portion of the piston guide 13 according to the vertical movement of the first piston 7 with respect to the holding member 11. The first inflow suppression portion 20 is constituted by the seating portion of the first piston 7 and the seated portion of the piston guide 13. When the seating portion is separated from the seated portion, the movement of the content 3 from the pump chamber 10 to the internal flow path 14 is allowed, while when the seating portion is seated on the seated portion, the movement of the content 3 in the reverse direction is suppressed.

[0031] The first retaining member 15 is annular with the central axis O as the center, and has a first retaining portion 15a and a contact convex portion 15b. The first retaining portion 15a is cylindrical and extends in the vertical direction along the inner peripheral surface of the first cylinder main body 6b. On the outer peripheral surface of the first retaining portion 15a, a contact convex portion 15b that protrudes radially outward and contacts the upper end surface of the first cylinder main body 6b is provided. The lower end portion of the first retaining portion 15a contacts the upper end portion of the first sliding cylinder 7b that moves upward with respect to the first cylinder 6, so that the upward movement of the first sliding cylinder 7b can be restricted. The first retaining portion 15a can guide the stem 12 in the vertical direction by the inner peripheral surface of the first retaining portion 15a during the vertical movement of the holding member 11 with respect to the first cylinder 6.

[0032] The biasing member 17 includes a compression spring 17a that extends in the vertical direction with the central axis O as the center and can expand and contract in the vertical direction, a connecting body 17b that holds the upper end portion (upper end portion) of the compression spring 17a and is connected to the holding member 11 so as to be movable in the vertical direction integrally with the holding member 11, and a lower end member 17c that is connected to the lower end portion (lower end portion) of the compression spring 17a and is supported by the receiving portion 16b. The biasing member 17 is an integrally formed product in which the compression spring 17a, the connecting body 17b, and the lower end member 17c are integrally formed. The connecting body 17b has an engaging cylinder 17d with the central axis O as the center and an inward convex portion 17e that extends radially inward from the upper end portion of the engaging cylinder 17d. The inward convex portion 17e is annular with the central axis O as the center and fits into an annular groove formed on the outer peripheral surface of the stem 12 with the central axis O as the center at the inner peripheral edge. The connecting body 17b can operate in the vertical direction integrally with the holding member 11 with respect to the second cylinder 8 due to the fitting of the inward convex portion 17e and the stem 12. Therefore, the compression spring 17a expands and contracts according to the vertical movement of the holding member 11 and the connecting body 17b with respect to the second cylinder 8, and biases the holding member 11 upward with respect to the second cylinder 8 through the connecting body 17b in the contracted state.

[0033] The biasing member 17 can bias the first cylinder 6 upward via the engaging portion 26 between the connecting body 17b and the first cylinder 6 in a state where the first piston 7 and the holding member 11 are at the upper limit position with respect to the first cylinder 6. Therefore, the load acting on the upper end portion of the first sliding cylinder 7b of the first piston 7 can be reduced, and damage to the first piston 7 can be suppressed. The engaging portion 26 is composed of a convex portion provided on the outer peripheral surface of the first cylinder 6 and a concave portion provided on the inner peripheral surface of the engaging cylinder 17d of the connecting body 17b. The convex portion can move vertically with a stroke corresponding to the vertical stroke of the holding member 11 with respect to the first cylinder 6 with respect to the concave portion. Note that the engaging portion 26 may be composed of a concave portion provided on the outer peripheral surface of the first cylinder 6 and a convex portion provided on the inner peripheral surface of the engaging cylinder 17d of the connecting body 17b.

[0034] Further, the holding member 11 can push down the first cylinder 6 via the inward convex portion 17e of the connecting body 17b and the upper end portion of the first retaining member 15 in a state where the holding member 11 is at the lower limit position with respect to the first cylinder 6. Therefore, the load acting on the lower end portion of the first sliding cylinder 7b of the first piston 7 can be reduced, and damage to the first piston 7 can be suppressed. In a state where the holding member 11 is at the upper limit position with respect to the first cylinder 6, a vertical gap having a size corresponding to the vertical stroke of the holding member 11 with respect to the first cylinder 6 is formed between the inward convex portion 17e of the connecting body 17b and the upper end portion of the first retaining member 15.

[0035] The head body 25a is attached to the upper end portion of the stem 12. The nozzle tip 25b is attached in a fitting groove provided on the side surface of the head body 25a, and a flow path for discharging (i.e., spraying) the content 3 in a mist form from the discharge port 14a is formed by a groove between the head body 25a. The upper surface of the head body 25a forms an operated portion that receives a downward pressing operation from the outside. The nozzle head 25 is disposed radially inside the guide wall 24c of the mounting cap 24 and can operate vertically with respect to the second cylinder 8 and the container body 2 integrally with the holding member 11 by a downward pressing operation.

[0036] The internal flow path 14 discharges the content 3 in the first chamber 10a of the pump chamber 10 to the outside through the stem 12 and out of the discharge port 14a according to the operation of the holding member 11. The volume of the first chamber 10a is smaller than the volume of the second chamber 10b.

[0037] The upper lid 5 is configured to be able to open and close the ejector 1. The upper lid 5 has an outer peripheral wall 5a that is detachably attached to the outer peripheral surface of the peripheral wall 24a of the mounting cap 24 in a cylindrical shape centered on the central axis O when the upper lid 5 closes the ejector 1, and a top wall 5b that continues from the upper end of the outer peripheral wall 5a.

[0038] Since the ejector 1 of the present embodiment is configured as described above, it can operate as follows by a pressing-down operation.

[0039] When the holding member 11 moves downward with respect to the second cylinder 8 integrally with the connecting body 17b by a pressing-down operation against the biasing force of the compression spring 17a of the biasing member 17, the position of the first cylinder 6 is maintained until the inward convex portion 17e of the connecting body 17b abuts against the upper end portion of the first retaining member 15. First, the first chamber 10a contracts and the internal pressure of the first chamber 10a increases by the pressure accumulation mechanism 23. As shown in FIG. 2, the content 3 is vigorously discharged in a mist form from the discharge port 14a through the first inflow suppression portion 20 and the internal flow path 14. Thus, according to the present embodiment, at the initial stage of the operation of the holding member 11, in the small first chamber 10a, the content 3 can be efficiently compressed by the first outflow suppression portion 18 and the pressure accumulation mechanism 23 and discharged vigorously.

[0040] When the pressing operation is further continued, the inward convex portion 17e of the connecting body 17b abuts against the upper end portion of the first retaining member 15 to push down the first cylinder 6. Accordingly, the holding member 11, the first cylinder 6, and the second piston 9 operate integrally downward with respect to the second cylinder 8. As shown in FIG. 3, the second chamber 10b contracts and the internal pressure of the second chamber 10b increases by the pressure accumulating mechanism 23, and the content 3 is vigorously discharged in a mist form from the discharge port 14a through the first outflow restricting portion 18, the first chamber 10a, the first inflow restricting portion 20, and the internal flow path 14. Thus, according to the present embodiment, the discharge (spray) amount at one time can be set to be larger by the amount obtained by adding the second chamber 10b to the first chamber 10a. Therefore, according to the present embodiment, it is possible to increase the discharge (spray) amount while suppressing an increase in the stroke of the cylinder and suppressing an increase in the pressing operation force.

[0041] Further, according to the present embodiment, by one biasing member 17, not only can the first piston 7 be biased upward with respect to the first cylinder 6, but also the second piston 9 can be biased upward with respect to the second cylinder 8. Therefore, simplification of the structure can be easily realized.

[0042] In the second embodiment of the present invention shown in FIGS. 4 to 6, the dispenser 1 is different from the case of the first embodiment in that it does not have the first outflow restricting portion 18 (the valve body 19 and the reduced-diameter cylinder portion 6a), the pump chamber 10 is not divided into the first chamber 10a and the second chamber 10b, and the shape of the bottom wall 8d of the second cylinder 8 and the configuration of the second outflow restricting portion 21 are different. In other respects, it has the same configuration as the case of the first embodiment.

[0043] In the second embodiment, the bottom wall 8d of the second cylinder 8 has an annular step portion 8e that extends upward in a stepped manner radially inward from the lower end portion of the second cylinder main body 8b, and a central cylinder portion 8f that has a cylindrical shape centered on the central axis O extending upward from the inner peripheral edge of the annular step portion 8e. The central cylinder portion 8f has a suction port 8a at its upper end. The central cylinder portion 8f extends into the cylinder axis 9b of the second piston 9 in a state where the second piston 9 is at the upper limit position with respect to the second cylinder 8, and a gap through which the content 3 can pass in the vertical direction is formed between the outer peripheral surface of the central cylinder portion 8f and the inner peripheral surface of the cylinder axis 9b. In the second embodiment, the volume of the pump chamber 10 is smaller than that in the case of the first embodiment due to the provision of the annular step portion 8e and the central cylinder portion 8f on the bottom wall 8d.

[0044] The second outflow prevention portion 21 is formed by a spherical valve member 22 disposed in the pump chamber 10 and the outer peripheral portion of the suction port 8a. When the valve member 22 is separated from the outer peripheral portion of the suction port 8a, the movement of the content 3 from the container main body 2 into the pump chamber 10 is allowed, while when the valve member 22 seats on the outer peripheral portion of the suction port 8a, the movement of the content 3 in the reverse direction is suppressed.

[0045] According to the present embodiment, similar to the case of the first embodiment, it is possible to suppress an increase in the stroke of the cylinder and an increase in the pressing operation while increasing the discharge (spray) amount.

[0046] In the third embodiment of the present invention shown in FIGS. 7 to 9, the ejector 1 is different from the case of the first embodiment in that it does not have the first outflow prevention portion 18 (valve body 19), the pump chamber 10 is not divided into the first chamber 10a and the second chamber 10b, and the piston guide 13 has a plurality of elastic pieces 13b extending downward, and has the same configuration as the case of the first embodiment in other respects.

[0047] In the third embodiment, the piston guide 13 has a piston guide main body 13a and a plurality of elastic pieces 13b arranged in the circumferential direction. The piston guide main body 13a is attached to the inner peripheral surface of the stem 12, extends in the vertical direction around the central axis O, and has a rod shape with a diameter-expanded lower end portion. Each elastic piece 13b is provided so as to extend downward from the lower end of the rod-shaped piston guide 13a, and is elastically deformed radially inward by downward pressing contact with the inner peripheral surface of the reduced-diameter cylindrical portion 6a, thereby allowing the holding member 11 to move downward with respect to the first cylinder 6, and restoring deformation causes the holding member 11 to move upward with respect to the first cylinder 6. Note that the plurality of elastic pieces 13b are provided such that the lower end portions of the plurality of elastic pieces 13b do not block the opening formed at the inner peripheral edge of the reduced-diameter cylindrical portion 6a during elastic deformation.

[0048] According to the present embodiment, similar to the case of the first embodiment, it is possible to suppress an increase in the stroke of the cylinder and suppress an increase in the pressing operation while increasing the discharge (spray) amount. Further, according to the present embodiment, near the upper limit position of the holding member 11, the urging force from the elastic deformation of the elastic piece 13b can assist the upward urging of the holding member 11 by the urging member 17, so that the holding member 11 can be quickly returned to its initial position after the pressing operation.

[0049] In the fourth embodiment of the present invention shown in FIGS. 10 to 12, the ejector 1 is different from the case of the third embodiment in that the shape of the bottom wall 8d of the second cylinder 8 and the configuration of the second outflow suppression portion 21 are the same as those in the case of the second embodiment, and in other respects, it has the same configuration as the case of the third embodiment.

[0050] According to the fourth embodiment, similar to the case of the second embodiment, it is possible to suppress an increase in the stroke of the cylinder and suppress an increase in the pressing operation while increasing the discharge (spray) amount. Further, according to the present embodiment, similar to the case of the third embodiment, it is possible to easily realize a quick return of the holding member 11 to its initial position after the pressing operation.

[0051] The present invention is not limited to the above-described embodiments and can be variously modified without departing from the gist thereof.

[0052] Therefore, the ejector 1 of the above-described embodiment is an ejector 1 that is attached to the container body 2 and can store and eject the contents 3 in the container body 2, and includes a first cylinder 6 extending along the central axis O, a first piston 7 slidable in the vertical direction along the central axis O on the first cylinder 6, a second cylinder 8 attached to the mouth portion 2a of the container body 2, a second piston 9 slidable in the vertical direction on the second cylinder 8, a pump chamber 10 defined by the first cylinder 6, the first piston 7, the second cylinder 8, and the second piston 9, a holding member 11 operable in the vertical direction with the first piston 7 with respect to the first cylinder 6 and operable in the vertical direction with the first cylinder 6 and the second piston 9 with respect to the second cylinder 8 by an external operation, an internal flow path 14 for discharging the contents 3 in the pump chamber 10 to the outside through the holding member 11 in accordance with the vertical operation of the holding member 11, and a biasing member 17 for biasing the holding member 11 upward with respect to the second cylinder 8, and can be modified as long as it has the ejector 1.

[0053] For example, the valve body 19 is not limited to a spherical configuration. The ejector 1 is not limited to a configuration that ejects the content 3 in a mist form, and may be configured to eject it, for example, in a foam form or a straight form. The biasing member 17 may have a compression spring 17a made of metal. Also, the biasing member 17 may separately provide the compression spring 17a, the connecting body 17b, and the lower end member 17c. The biasing member 17 may be configured without the lower end member 17c. The ejector 1 is not limited to a configuration in which the lower end member 17c of the biasing member 17 is received by the second retaining member 16, and may be configured, for example, such that the lower end of the biasing member 17 is received by the annular wall 24b of the mounting cap 24. The holding member 11 may be configured as an integrally formed product in which the stem 12 and the piston guide 13 are integrally formed. The second cylinder 8 is not limited to a configuration having a larger diameter than the first cylinder 6. The second piston 9 is not limited to a configuration integrally formed with the first cylinder 6. The ejector 1 is not limited to a configuration in which the holding member 11 is moved in the vertical direction by an operation of directly pushing down the upper surface of the nozzle head 25, and may be configured, for example, such that the holding member 11 is moved in the vertical direction by pulling the trigger.

[0054] Note that, in the ejector 1 of the above-described embodiment, in the above configuration, it is preferable that the biasing member 17 has a compression spring 17a that can expand and contract in the vertical direction, and a connecting body 17b that connects the upper end portion of the compression spring 17a to the holding member 11 so as to be movable in the vertical direction integrally with the holding member 11.

[0055] In the ejector 1 of the above-described embodiment, in the above configuration, it is preferable that the ejector 1 is such that the holding member 11 can push down the first cylinder 6 via the connecting body 17b in a state where the holding member 11 is at the lower limit position with respect to the first cylinder 6.

[0056] In the ejector 1 of the above-described embodiment, in the above configuration, it is preferable that the ejector 1 is such that the biasing member 17 can bias the first cylinder 6 upward via the engaging portion 26 between the connecting body 17b and the first cylinder 6.

[0057] In the above-described configuration, the ejector 1 of the foregoing embodiment has an engaging cylinder 17d centered on the central axis O and an inward convex portion 17e extending radially inward from the upper end portion of the engaging cylinder 17d. It is preferable that the ejector 1 is such that the inward convex portion 17e is fitted to the holding member 11 so as to be vertically movable integrally with the holding member 11 with respect to the second cylinder 8.

[0058] In the above-described configuration, the ejector 1 of the foregoing embodiment has a cylindrical stem 12 extending in the vertical direction and a piston guide 13 attached to the inner peripheral surface of the stem 12. The first piston 7 has an elastic cylindrical portion 7a surrounding the outer peripheral surface of the piston guide 13 extending in the vertical direction. A part of the internal flow path 14 is defined by the inner peripheral surface of the elastic cylindrical portion 7a and the outer peripheral surface of the piston guide 13, and the internal flow path 14 closed by the contact between the inner peripheral surface of the elastic cylindrical portion 7a and the outer peripheral surface of the piston guide 13 is opened when the elastic cylindrical portion 7a is elastically deformed radially outward by the accumulated pressure in the pump chamber 10. It is preferable that the ejector 1 is such.

[0059] In the above-described configuration, the ejector 1 of the foregoing embodiment has a reduced-diameter cylindrical portion 6a in which the first cylinder 6 gradually reduces in diameter downward, and the piston guide 13 has an elastic piece 13b extending downward. The elastic piece 13b is elastically deformed radially inward by being pressed downward against the inner peripheral surface of the reduced-diameter cylindrical portion 6a, thereby allowing the holding member 11 to move downward with respect to the first cylinder 6, and the holding member 11 is moved upward with respect to the first cylinder 6 by the restoring deformation. It is preferable that the ejector 1 is such.

[0060] In the above-described configuration, it is preferable that the ejector 1 ejects the content 3 in a mist form from the discharge port 14a.

Explanation of Reference Numerals

[0061] 1 Ejector 2 Container body 2a Mouth portion 2b Barrel portion 3 Content 4 Discharge container 5 Upper lid 5a Outer peripheral wall 5b Top wall 6 First cylinder 6a Reduced-diameter cylindrical portion 6b First cylinder body 7 First piston 7a Elastic cylindrical portion 7b First sliding cylinder 8 Second cylinder 8a Suction port 8b Second cylinder body 8c Flange 8d Bottom wall 8e Annular stepped portion 8f Central cylindrical portion 9 Second piston 9a Second sliding cylinder 9b Cylinder axis 10 Pump chamber 10a First chamber 10b Second chamber 11 Holding member 12 Stem 13 Piston guide 13a Piston guide body 13b Elastic piece 14 Internal flow path 14a Discharge port 15 First anti-disengagement member 15a First anti-disengagement portion 15b Contact convex portion 16 Second anti-disengagement member 16a Second anti-disengagement portion 16b Receiving portion 16c Holding convex portion 16d Supporting portion 16e Guide cylinder 17 Biasing member 17a Compression spring 17b Connecting body 17c Lower end member 17d Engaging cylinder 17e Inward convex portion 18 First outflow suppression portion 19 Valve body 20 First inflow suppression portion 21 Second outflow suppression portion 22 Valve member 23 Pressure accumulating mechanism 24 Mounting cap 24a Peripheral wall 24b Annular wall 24c Guide wall 25 Nozzle head 25a Head body 25b Nozzle tip 26 Engagement part O Central axis

Claims

1. A discharger attached to a container body for accumulating and discharging the contents inside the container body, a first cylinder extending along a central axis, a first piston slidable in the vertical direction along the first cylinder along the central axis, a second cylinder attached to the mouth of the container body, a second piston slidable in the vertical direction on the second cylinder, a pump chamber defined by the first cylinder, the first piston, the second cylinder and the second piston, a holding member operable in the vertical direction with the first piston with respect to the first cylinder and operable in the vertical direction with the first cylinder and the second piston with respect to the second cylinder by an external operation, an internal flow path for discharging the contents in the pump chamber to the outside through the holding member in response to the vertical movement of the holding member, a biasing member for biasing the holding member upward with respect to the second cylinder, and having the biasing member having a compression spring that can expand and contract in the vertical direction, and a connecting body that connects the upper end of the compression spring to the holding member so as to be movable integrally with the holding member in the vertical direction, the connecting body having an engaging cylinder centered on the central axis and an inward convex portion extending radially inward from the upper end of the engaging cylinder, the inward convex portion fitting into the holding member so as to be operable in the vertical direction integrally with the holding member with respect to the second cylinder, a discharger.

2. The discharger according to claim 1, wherein the holding member can push down the first cylinder via the connecting body in a state where the holding member is at a lower limit position with respect to the first cylinder.

3. The discharger according to claim 1 or 2, wherein the biasing member can bias the first cylinder upward via an engaging portion between the connecting body and the first cylinder.

4. The holding member has a cylindrical stem extending in the vertical direction and a piston guide attached to the inner peripheral surface of the stem, The first piston has an elastic cylindrical portion surrounding the outer peripheral surface of the piston guide extending in the vertical direction, A part of the internal flow path is defined by the inner peripheral surface of the elastic cylindrical portion and the outer peripheral surface of the piston guide, The internal flow path blocked by the contact between the inner peripheral surface of the elastic cylindrical portion and the outer peripheral surface of the piston guide is opened when the elastic cylindrical portion is elastically deformed radially outward by the accumulated pressure in the pump chamber. The ejector according to any one of claims 1 to 3.

5. The first cylinder has a reduced-diameter cylindrical portion that gradually reduces in diameter downward, The piston guide has an elastic piece extending downward, The elastic piece is elastically deformed radially inward by the downward pressure contact against the inner peripheral surface of the reduced-diameter cylindrical portion, thereby allowing the downward movement of the holding member relative to the first cylinder, and restoring deformation causes the holding member to move upward relative to the first cylinder. The ejector according to claim 4.

6. The ejector according to any one of claims 1 to 5, which discharges the content in a mist form from the discharge port.

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