Pump-type discharge tool and pump-type discharge container

Abstract

To provide a pump-type discharge tool and a pump-type discharge container in which a force necessary for push-down operation to push down a push-down head as having a synthetic resin piston is reduced.SOLUTION: Provided is a pump-type discharge tool 1 has: a fitting cap 10; a cylinder body 20; a piston guide 30; a push-down head 40; a spring 50; a synthetic resin piston 60 provided with a lower side seal piece 61a and an upper side seal piece 61b; an inflow side check valve 70; and a pressing part 80 integrally provided with the fitting cap 10 and configured to press the upper side seal piece 61b on an inner peripheral surface of the cylinder body 20 when the piston 60 is positioned at an initial position, wherein the piston 60 moves downward from the initial position to separate from the pressing part 80, which makes the lower side seal piece 61a pressed further on the inner peripheral surface of the cylinder body 20 and the upper seal piece 61b rotates in a direction apart from the inner peripheral surface of the cylinder body 20. Also provided is a pump-type discharge container 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pump-type dispenser and a pump-type discharge container.

Background Art

[0002] As a discharge container for storing disinfecting alcohol, hand soap, etc. as contents, in order to facilitate the removal of the contents, a pump-type dispenser or a pump-type discharge container configured to operate a pump by pressing a push-down head and discharge a predetermined amount of the contents to the outside by distribution is known (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] For example, when all the members constituting the pump-type dispenser are made of a synthetic resin material in order to enhance recyclability, etc., using a piston made of a synthetic resin has been considered.

[0005] However, when the piston is made of a synthetic resin, compared with the case where it is formed of an elastic material such as synthetic rubber, there is a problem that the sliding resistance of the piston against the inner peripheral surface of the cylinder becomes large, and a large force is required for the pressing operation of the push-down head, making the pressing operation difficult.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a pump-type dispenser and a pump-type discharge container having a piston made of a synthetic resin and reducing the force required for the pressing operation of the push-down head.

Means for Solving the Problems

[0007] The pump-type applicator of the present invention is a pump-type applicator used by being attached to the mouth part of a container body, and includes a mounting cap attached to the mouth part, an air replacement hole, a cylinder body supported by the mounting cap and disposed inside the container body, a piston guide having an upper end protruding upward from the mounting cap and a lower end side disposed inside the cylinder body, a nozzle part continuous with the inner flow path of the piston guide, a pressing head attached to the upper end of the piston guide and capable of being pushed downward together with the piston guide, a spring provided between the mounting cap and the pressing head and biasing the pressing head upward, a lower seal piece contacting the inner peripheral surface of the cylinder body and an upper seal piece provided above the lower seal piece, a synthetic resin piston that partitions and forms a cylinder chamber inside the cylinder body and is movable in the vertical direction in cooperation with the pressing head, an inflow-side check valve provided at the lower end of the cylinder body and opening and closing to allow the inflow of the content from the inside of the container body into the cylinder chamber, and a pressing part integrally provided on the mounting cap and configured to contact the piston when the piston is in the initial position and press the upper seal piece against the inner peripheral surface of the cylinder body. When the piston moves downward from the initial position and separates from the pressing part, the lower seal piece is further pressed against the inner peripheral surface of the cylinder body and the upper seal piece is configured to rotate in a direction away from the inner peripheral surface of the cylinder body.

[0008] In the pump-type applicator of the present invention having the above configuration, it is preferable that the piston has a piston main body part provided with the lower seal piece and the upper seal piece, an inner cylinder part mounted outside the piston guide, and an annular connecting part that is integrally continuous with the piston main body part and the inner cylinder part and has a thin-walled part, and the piston main body part is configured to rotate around the thin-walled part.

[0009] In the pump-type dispenser of the present invention, in the above configuration, it is preferable that the mounting cap, the cylinder body, the piston guide, the pressing head, the spring, the inflow-side check valve, and the pressing portion are each made of the same synthetic resin as the piston.

[0010] The pump-type discharge container of the present invention is characterized by having a container body and the pump-type dispenser mounted on the mouth of the container body.

Advantages of the Invention

[0011] According to the present invention, it is possible to provide a pump-type dispenser and a pump-type discharge container that have a piston made of synthetic resin and in which the force required for the pressing operation of the pressing head is reduced.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0013] Hereinafter, the pump-type dispenser 1 and the pump-type discharge container 2 according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] In the present specification and claims, the vertical direction shall mean the vertical direction in the state where the pump-type discharging tool 1 to the pump-type discharging container 2 is in the upright posture shown in FIG. 1.

[0015] As shown in FIG. 1, the pump-type discharging tool 1 according to the present embodiment is a so-called pump-type dispenser that is attached to and used at the mouth portion 3a of the container body 3. The pump-type discharging container 2 is constituted by the pump-type discharging tool 1 and the container body 3.

[0016] The container body 3 is, for example, a synthetic resin bottle container having a cylindrical mouth portion 3a centered on the axis O. The container body 3 can store, for example, a liquid or fluid such as disinfecting alcohol or hand soap as the content 4 inside. The pump-type discharging tool 1 can distribute and discharge the content 4 stored in the container body 3 in predetermined amounts to the outside.

[0017] The pump-type discharging tool 1 has a mounting cap 10, a cylinder body 20, a piston guide (stem) 30, a pressing head 40, a spring 50, a piston 60, an inflow-side check valve 70, and a pressing portion 80.

[0018] In the present embodiment, the mounting cap 10, the cylinder body 20, the piston guide 30, the pressing head 40, the spring 50, the piston 60, the inflow-side check valve 70, and the pressing portion 80 are each made of synthetic resin formed of polypropylene resin, which is the same synthetic resin material. Thereby, the recyclability of the pump-type discharging tool 1 is enhanced.

[0019] The mounting cap 10 includes a capped cylindrical cap body 11 centered on the axis O, and the cap body 11 is detachably attached to the mouth portion 3a by screw connection. Note that the cap body 11 is not limited to screw connection, and may be configured to be attached to the mouth portion 3a by, for example, a stopper.

[0020] In this embodiment, the mounting cap 10 is integrally provided with a cylindrical guide tube 12 that is continuously connected to the top wall 11a of the cap body 11 and extends vertically upward from the top wall 11a. An annular spring receiving portion 13 along the inner peripheral surface of the guide tube 12 is integrally provided at the lower end of the guide tube 12.

[0021] The cylinder body 20 includes a cylindrical cylinder main body 21 centered on the axis O and a flange portion 22 integrally connected to the upper end of the cylinder main body 21. The cylinder body 20 is supported by the mounting cap 10 with the flange portion 22 being fitted and fixed inside the cap body 11 and is disposed inside the container body 3.

[0022] An air replacement hole 23 for introducing outside air into the container body 3 as the content 4 stored in the container body 3 decreases is provided in the cylinder main body 21.

[0023] In addition, an inlet 24 is provided at the lower end of the cylinder body 20. Further, a connection cylinder portion 25 that surrounds the inlet 24 and projects downward is integrally provided at the lower end of the cylinder body 20. A tube 26 communicating with the inside of the container body 3 and the inlet 24 is connected to the connection cylinder portion 25. Although not shown in detail, the tube 26 extends to the bottom of the container body 3.

[0024] The piston guide 30 has a bottomed cylindrical shape having a cylindrical peripheral wall 31 centered on the axis O and a bottom wall 32 closing the lower end of the peripheral wall 31, and the inside thereof is an inner flow path 33. The upper end of the piston guide 30 projects upward from the mounting cap 10 and the lower end side is disposed inside the cylinder body 20.

[0025] An inflow hole 34 penetrating the peripheral wall 31 is provided at the lower end side of the peripheral wall 31 disposed inside the cylinder body 20.

[0026] Further, a stopper portion 35 is integrally provided at the lower end of the peripheral wall 31. The stopper portion 35 has a flange shape extending radially outward from the outer peripheral surface of the peripheral wall 31, and a plurality of notches 35a are provided at intervals in the circumferential direction on its outer peripheral surface.

[0027] The pressing head 40 includes a nozzle portion 41 connected to the inner flow path 33 of the piston guide 30, and is attached to the upper end of the piston guide 30 by fitting and fixing a mounting cylinder portion 43 provided on the head body 42 to the upper end of the peripheral wall 31 of the piston guide 30. The nozzle portion 41 protrudes laterally from the head body 42, and its tip serves as a discharge port 41a for the content 4. The head body 42 integrally includes a cylindrical outer peripheral wall 44 having a larger diameter than the guide cylinder 12.

[0028] The pressing head 40 can be pushed downward together with the piston guide 30 while the outer peripheral wall 44 is guided by the guide cylinder 12. That is, the pressing head 40 can move vertically along the axis O with respect to the cylinder body 20 between the top dead center position (the position shown in FIG. 1) and the bottom dead center position together with the piston guide 30. Therefore, by operating the pressing head 40 downward, the piston guide 30 can be moved from the top dead center to the bottom dead center.

[0029] A pressing cylinder portion 45 is integrally provided on the pressing head 40. The pressing cylinder portion 45 has a cylindrical shape centered on the axis O, and is arranged coaxially and integrally with the lower end of the mounting cylinder portion 43 with a gap outside the peripheral wall 31 of the piston guide 30. The lower end of the pressing cylinder portion 45 is adjacent to the inside of the spring receiving portion 13 at the lower end of the guide cylinder 12.

[0030] The spring 50 is provided between the mounting cap 10 and the pressing head 40, and biases the pressing head 40 upward, i.e., toward the top dead center. More specifically, the spring 50 is coaxially disposed outside the mounting cylinder portion 43 and the pressing cylinder portion 45. Its upper end abuts against the lower surface of the head body 42 of the pressing head 40 inside the outer peripheral wall 44, and its lower end engages with the spring receiving portion 13 provided on the mounting cap 10. The pressing head 40 and the piston guide 30 are biased upward by the elastic force of the spring 50 in the natural state where no pressing force is applied, regardless of whether they are at the top dead center, the bottom dead center, or any position between the top dead center and the bottom dead center.

[0031] Note that as long as the spring 50 is provided between the mounting cap 10 and the pressing head 40, it may be provided at a portion other than the above.

[0032] As shown in FIG. 2, the piston 60 is annular with the axis O as the center, and integrally has a piston main body portion 61, an inner cylinder portion 62, and a connecting portion 63.

[0033] The piston main body portion 61 includes a lower seal piece 61a that abuts against the inner peripheral surface of the cylinder main body 21 of the cylinder body 20, and an upper seal piece 61b provided above the lower seal piece 61a. The space between the lower seal piece 61a and the upper seal piece 61b is a cylindrical portion 61c, and the lower seal piece 61a and the upper seal piece 61b project radially outward with respect to the cylindrical portion 61c.

[0034] The inner cylinder portion 62 is cylindrical with the axis O as the center, and is mounted outside the peripheral wall 31 of the piston guide 30. When the piston guide 30 is at the top dead center, the inner cylinder portion 62 abuts against the stopper portion 35 over the entire circumference at its lower end 62a, and abuts against the inner peripheral surface of the pressing cylinder portion 45 over the entire circumference at its upper end 62b. By the lower end 62a of the inner cylinder portion 62 abutting against the stopper portion 35 over the entire circumference, the inflow hole 34 of the piston guide 30 is blocked from communicating with the cylinder chamber R.

[0035] The connecting portion 63 is annular with the axis O as the center, and is integrally connected to the piston main body portion 61 and the inner cylinder portion 62. The connecting portion 63 is provided with an annular groove 63a on its upper surface, and thus has a thin-walled portion 63b that is thinner than other portions.

[0036] As shown in FIG. 3, in the natural state of the piston 60 alone, the outer diameter D1 of the lower seal piece 61a is larger than the outer diameter D2 of the upper seal piece 61b. Also, the vertical distance d1 from the portion connected to the connecting portion 63 of the piston main body portion 61 to the lower seal piece 61a is smaller than the vertical distance d2 from the portion connected to the connecting portion 63 of the piston main body portion 61 to the upper seal piece 61b. And the piston main body portion 61 can rotate about the connecting portion 63 in a direction in which the outer diameter D1 of the lower seal piece 61a increases while the outer diameter D2 of the upper seal piece 61b decreases, and in a direction in which the outer diameter D1 of the lower seal piece 61a decreases while the outer diameter D2 of the upper seal piece 61b increases, due to the elastic deformation of the connecting portion 63 in the vertical direction. In particular, in this embodiment, since the connecting portion 63 has the thin-walled portion 63b, the piston main body portion 61 can easily rotate about the thin-walled portion 63b.

[0037] Note that the connecting portion 63 may be configured without the thin-walled portion 63b. In this case, the piston main body portion 61 may be configured to rotate about, for example, any position of the connecting portion 63, or may be configured to rotate about the connecting portion with the connecting portion 63.

[0038] As shown in Fig. 1, the piston 60 forms a cylinder chamber R inside the cylinder body 20 by the lower sealing piece 61a contacting the inner peripheral surface of the cylinder main body 21. Further, the piston 60 is disposed below the pressing cylinder portion 45 with a predetermined interval (an interval sufficiently smaller than the stroke between the top dead center and the bottom dead center of the pressing head 40). Furthermore, the piston 60 can move in the vertical direction in cooperation with the pressing head 40. That is, when the pressing head 40 is pressed down, the pressing cylinder portion 45 moves downward together with the pressing head 40 and the piston guide 30. After the lower end 62a of the inner cylinder portion 62 separates from the stopper portion 35 provided on the piston guide 30, the lower end of the pressing cylinder portion 45 contacts the piston 60, and the piston 60 moves downward together with the pressing head 40 by being pushed by the pressing cylinder portion 45. Also, when the pressing head 40 moves upward, after the stopper portion 35 provided on the piston guide 30 that moves upward together with the pressing head 40 contacts the lower end 62a of the inner cylinder portion 62, the piston 60 moves upward together with the pressing head 40 as the inner cylinder portion 62 is pushed by the stopper portion 35.

[0039] The inflow-side check valve 70 is provided at the lower end of the cylinder body 20 and opens and closes to allow the content 4 to flow from the inside of the container body 3 into the cylinder chamber R.

[0040] In the present embodiment, the inflow-side check valve 70 is a three-point valve integrally having an annular support body 71 fitted and fixed to the lower end of the cylinder body 20, a valve body 72 disposed above the inflow port 24 to close the inflow port 24, and three (only one is shown in Fig. 1) elastically deformable connecting leg portions 73 connecting the support body 71 and the valve body 72. When the pressure inside the cylinder chamber R is the same as or higher than the pressure inside the container body 3, the valve body 72 contacts the upper surface of the peripheral edge of the inflow port 24 to close the space between the inflow port 24 and the cylinder chamber R. On the other hand, when the pressure inside the cylinder chamber R becomes lower than the pressure inside the container body 3, the plurality of connecting leg portions 73 elastically deform and the valve body 72 moves upward, and the inflow-side check valve 70 opens to communicate the inflow port 24 with the cylinder chamber R.

[0041] In addition, the inflow check valve 70 may be a check valve having a configuration other than the above-mentioned three-way valve as long as it is provided at the lower end of the cylinder body 20 and opens and closes to allow the inflow of the content 4 from the inside of the container body 3 toward the cylinder chamber R.

[0042] The pressing portion 80 is provided integrally with the mounting cap 10 and is configured to contact the piston 60 when the piston 60 is in the initial position (the position shown in FIG. 1) and press the upper seal piece 61b against the inner peripheral surface of the cylinder body 20.

[0043] In the present embodiment, as shown in FIG. 2, the pressing portion 80 is provided as a corner portion of a downward step portion provided on the outer peripheral surface on the lower end side of the guide cylinder 12. The pressing portion 80 is configured to contact the cylindrical portion 61c above the connecting portion 63 and press the upper seal piece 61b against the inner peripheral surface of the cylinder main body 21 when the piston 60 is in the initial position.

[0044] When the upper seal piece 61b is pressed by the pressing portion 80 and contacts the inner peripheral surface of the cylinder main body 21 when the piston 60 is in the initial position, the piston main body portion 61 rotates so that the lower seal piece 61a moves away from the inner peripheral surface of the cylinder main body 21. At this time, the vertical distance d1 from the portion connected to the connecting portion 63 of the piston main body portion 61 to the lower seal piece 61a is smaller than the vertical distance d2 from the portion connected to the connecting portion 63 of the piston main body portion 61 to the upper seal piece 61b. Therefore, even in the rotated state, the lower seal piece 61a can contact the inner peripheral surface of the cylinder main body 21 with a predetermined pressure and provide sufficient sealing performance against the content 4.

[0045] As shown in FIG. 2, the air replacement hole 23 provided in the cylinder main body 21 is located between the lower seal piece 61a and the upper seal piece 61b when the piston 60 is in the initial position. As shown in FIG. 1, the air replacement hole 23 communicates with the outside through the gap between the guide cylinder 12 and the pressing-down cylinder portion 45 and the gap between the guide cylinder 12 and the outer peripheral wall 44. When the piston 60 operates, outside air corresponding to the amount of the content 4 discharged into the container main body 3 through the gap can be introduced. However, when the piston 60 is in the initial position, the air replacement hole 23 is sealed between the lower seal piece 61a and the upper seal piece 61b pressed against the inner peripheral surface of the cylinder main body 21 by the pressing portion 80, and the communication with the outside is blocked. Therefore, during distribution or the like, even if the container main body 3 is in a fallen posture, for example, it is possible to prevent the content 4 from leaking out to the outside through the gap from the air replacement hole 23.

[0046] Next, a method of using the pump-type discharge tool 1 or the pump-type discharge container 2 having the above configuration will be described.

[0047] When discharging the content 4 from the nozzle portion 41 of the pump-type discharge container 2, a pressing-down operation is performed with the pressing-down head 40 directed downward from the initial state (the state shown in FIG. 1) where the pressing-down head 40 is at the top dead center (the position shown in FIG. 1).

[0048] As shown in FIG. 4, when the pressing-down head 40 is pressed downward and moves downward from the top dead center to the bottom dead center, the piston guide 30 and the pressing-down cylinder portion 45 move downward together with the pressing-down head 40 while compressing the spring 50.

[0049] When the piston guide 30 moves downward, the lower end 62a of the inner cylinder portion 62 separates from the stopper portion 35, and the inflow hole 34 of the piston guide 30 communicates with the cylinder chamber R. After the inflow hole 34 communicates with the cylinder chamber R, the lower end of the pressing-down cylinder portion 45 abuts against the piston 60, and thereafter, the piston 60 is pushed by the pressing-down cylinder portion 45 and moves downward together with the piston guide 30 and the pressing-down cylinder portion 45.

[0050] When the piston 60 moves downward, the volume of the cylinder chamber R is narrowed by the piston 60, and the content 4 inside the cylinder chamber R is pressurized and discharged from the inflow hole 34 through the inner flow path 33 inside the piston guide 30 to the outside from the discharge port 41a of the nozzle portion 41. At this time, the inflow-side check valve 70 is in a closed state.

[0051] Here, as shown in FIG. 5, when the piston 60 is pushed by the push-down cylinder portion 45 and moves downward from the initial position, the piston main body portion 61 separates from the pressing portion 80, and due to the internal stress thereof, the lower seal piece 61a of the piston main body portion 61 is further pressed against the inner peripheral surface of the cylinder main body 21 of the cylinder body 20, and the upper seal piece 61b rotates about the thin-walled portion 63b of the connecting portion 63 in a direction away from the inner peripheral surface of the cylinder main body 21 of the cylinder body 20. In the present embodiment, due to the rotation, the upper seal piece 61b is slightly separated from the inner peripheral surface of the cylinder main body 21. Note that after the rotation, the upper seal piece 61b may be configured to slightly touch the inner peripheral surface of the cylinder main body 21 so that the seal is released.

[0052] As described above, in the pump-type discharge tool 1 and the pump-type discharge container 2 according to the present embodiment, in the initial position, the piston 60 can reliably seal the air replacement hole 23 with both the lower seal piece 61a and the upper seal piece 61b contacting the inner peripheral surface of the cylinder main body 21. When the push-down head 40 is pushed down and the piston 60 moves downward from the initial position, only the lower seal piece 61a slides on the inner peripheral surface of the cylinder main body 21, and the upper seal piece 61b is separated from or slightly contacts the inner peripheral surface of the cylinder main body 21, so that the sliding resistance generated between the inner peripheral surface of the cylinder body 20 when moving downward from the initial position can be reduced. Therefore, while ensuring the desired sealing performance by the synthetic resin piston 60, the force required for the push-down operation of the push-down head 40 can be reduced.

[0053] In addition, in the pump-type applicator 1 and the pump-type discharge container 2 according to the present embodiment, the piston 60 is configured to include a piston main body portion 61, an inner cylinder portion 62, and a connecting portion 63, and the piston main body portion 61 is configured to rotate about a thin-walled portion 63b provided in the connecting portion 63. Therefore, the piston main body portion 61 can be rotated more easily, and the above-described effects can be obtained more reliably.

[0054] Furthermore, in the pump-type applicator 1 and the pump-type discharge container 2 according to the present embodiment, the mounting cap 10, the cylinder body 20, the piston guide 30, the push-down head 40, the spring 50, the inflow-side check valve 70, and the pressing portion 80 are each made of the same synthetic resin as the piston 60. Therefore, while enhancing the recyclability of the pump-type applicator 1 to the pump-type discharge container 2, the force required for the push-down operation of the push-down head 40 can be reduced.

[0055] After the push-down head 40 is pushed down to the bottom dead center and the discharge of the content 4 is completed, when the push-down operation of the push-down head 40 is released, the push-down head 40 moves upward toward the top dead center by the spring force of the spring 50. When the push-down head 40 moves upward, the stopper portion 35 abuts against the lower end 62a of the inner cylinder portion 62, and the communication between the cylinder chamber R of the inflow hole 34 is blocked. In this state, when the push-down head 40 further moves upward, the cylinder chamber R is brought into a negative pressure by the piston 60 that moves upward together with the push-down head 40, and the inflow-side check valve 70 opens, and the content 4 inside the container body 3 is filled into the cylinder chamber R through the tube 26 and the inlet 24. When the push-down head 40 returns to the top dead center, the piston 60 also returns to the initial position, the air replacement hole 23 is closed by the piston 60, and the cylinder chamber R is filled with the content 4.

[0056] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

[0057] For example, in the above-described embodiment, the piston 60 is configured to integrally include the piston main body portion 61, the inner cylinder portion 62, and the connecting portion 63, but the present invention is not limited thereto.

[0058] In addition, in the above-described embodiment, the pump-type discharge tool 1 is made of synthetic resin in which the mounting cap 10, the cylinder body 20, the piston guide 30, the pressing head 40, the spring 50, the piston 60, the inflow-side check valve 70, and the pressing portion 80 are each formed of the same synthetic resin material. However, as long as the piston 60 is made of synthetic resin, the other members may be formed of other materials.

[0059] Furthermore, in the above-described embodiment, the pressing portion 80 is provided as a corner portion of a downward step portion in the guide cylinder 12. However, the present invention is not limited to this, and as long as the upper seal piece 61b can be pressed against the inner peripheral surface of the cylinder body 20 when the piston 60 is in the initial position, other shapes may be used, or it may be provided separately from the guide cylinder 12.

Explanation of Reference Numerals

[0060] 1 Pump-type discharge tool 2 Pump-type discharge container 3 Container body 3a Mouth portion 4 Contents 10 Mounting cap 11 Cap body 11a Top wall 12 Guide cylinder 13 Spring receiving portion 20 Cylinder body 21 Cylinder main body 22 Flange portion 23 Air replacement hole 24 Inlet 25 Connection cylinder portion 26 Tube 30 Piston guide 31 Peripheral wall 32 Bottom wall 33 Inner flow path 34 Inflow hole 35 Stopper portion 35a Notch 40 Pressing head 41 Nozzle portion 41a Discharge port 42 Head body 43 Mounting cylinder part 44 Outer peripheral wall 45 Pushing-down cylinder part 50 Spring 60 Piston 61 Piston main body part 61a Lower sealing piece 61b Upper sealing piece 61c Cylindrical part 62 Inner cylindrical part 62a Lower end 62b Upper end 63 Connecting part 63a Annular groove 63b Thin-walled part 70 Inflow side check valve 71 Support body 72 Valve body 73 Connecting leg part 80 Pressing part O Axis R Cylinder chamber D1 Outer diameter D2 Outer diameter d1 Distance d2 Distance

Claims

1. A pump-type discharging tool that is used by being attached to the mouth of a container body, a mounting cap that is attached to the mouth, a cylinder body that has an air replacement hole and is supported by the mounting cap and disposed inside the container body, a piston guide whose upper end protrudes upward from the mounting cap and whose lower end side is disposed inside the cylinder body, a nozzle portion that is continuous with the inner flow path of the piston guide, and a pressing head that is attached to the upper end of the piston guide and can be pushed downward together with the piston guide, a spring that is provided between the mounting cap and the pressing head and biases the pressing head upward, a lower sealing piece that abuts against the inner peripheral surface of the cylinder body and an upper sealing piece that is provided above the lower sealing piece, partitioning a cylinder chamber inside the cylinder body and a synthetic resin piston that can move in the vertical direction in cooperation with the pressing head, an inflow-side check valve that is provided at the lower end of the cylinder body and opens and closes to allow the inflow of the content from inside the container body toward the cylinder chamber, a pressing portion that is integrally provided on the mounting cap and is configured to abut against the piston and press the upper sealing piece against the inner peripheral surface of the cylinder body when the piston is in the initial position, and has, when the piston moves downward from the initial position and separates from the pressing portion, the lower sealing piece is further pressed against the inner peripheral surface of the cylinder body and the upper sealing piece is configured to rotate in a direction away from the inner peripheral surface of the cylinder body. A pump-type discharging tool characterized by this.

2. The piston, a piston main body portion provided with the lower sealing piece and the upper sealing piece, an inner cylinder portion attached to the outside of the piston guide, and an annular connecting portion that is integrally continuous with the piston main body portion and the inner cylinder portion and has a thin portion, The piston main body portion is configured to rotate around the thin portion. The pump-type discharging tool according to Claim 1.

3. The mounting cap, the cylinder body, the piston guide, the pressing head, the spring, the inflow-side check valve, and the pressing portion are each made of the same synthetic resin as the piston. The pump-type discharging tool according to Claim 1 or 2.

4. A pump-type discharge container, comprising: a container body; and the pump-type discharge tool according to claim 1 attached to the mouth of the container body.

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