Discharge container

Abstract

The present invention provides a discharge container that can prevent the nozzle tip from detaching or becoming partially detached due to the discharge pressure generated in the downstream flow path by the external force acting on the stem when the container falls in an inverted position. [Solution] The discharge container 1 includes a container 2, a pump base 5 having a cylinder 5a1, a pump lifting section 6 having a piston 6a, a stem section 6b, and a nozzle section 7 forming a discharge port 6c, a spring section 8, a pump chamber 9 partitioned by the cylinder 5a1 and the piston 6a, and a downstream flow path 10 extending from the pump chamber 9 to the discharge port 6c. The nozzle section 7 includes a nozzle body section 7a and a nozzle tip 7b attached to the nozzle body section 7a. The downstream flow path 10 has a flow path throttling section 10a that narrows the flow path cross-sectional area between the pump chamber 9 and the discharge port 6c. When the cross-sectional area of ​​the downstream flow path 10 at the stem section 6b is S1 and the flow path cross-sectional area of ​​the flow path throttling section 10a is S2, then S2 is (1 / 14)S1 to (1 / 5)S1.

Description

Technical Field

[0001] The present invention relates to a discharge container.

Background Art

[0002] A pump base having a cylinder and attached to the mouth of the container, a piston sliding in the cylinder, a stem portion that moves up and down with respect to the cylinder along with the piston, and a pump lifting portion having a nozzle portion that extends forward from the upper end of the stem portion and forms a discharge port, a pump chamber partitioned by the cylinder and the piston, and a downstream flow path extending from the pump chamber to the discharge port. The nozzle portion has a nozzle main body portion and a nozzle tip attached to the front end portion of the nozzle main body portion by fitting. The nozzle tip has a tip peripheral wall extending in the nozzle axial direction and a tip front wall extending radially inward from the front edge of the tip peripheral wall and forming a discharge port. The pump lifting portion discharges the contents from the pump chamber through the downstream flow path from the discharge port by receiving an external force that lowers the stem portion with respect to the cylinder. A discharge container 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] An object of the present invention is to provide a discharge container capable of suppressing the nozzle tip from coming off or being on the verge of coming off due to the discharge pressure generated in the downstream flow path by the external force acting on the stem portion when the container falls in an inverted posture.

Means for Solving the Problems

[0005] One aspect of the present invention is as follows.

[0006] [1] A container having a mouth, body, and bottom arranged in this order, A pump base having a cylinder and attached to the aforementioned opening, A pump lifting section having a piston that slides on a sliding surface on the inner circumferential surface of the cylinder, a stem that moves up and down relative to the cylinder together with the piston, and a nozzle that extends forward from the upper end of the stem and forms a discharge port, A spring portion that generates a biasing force to raise the pump lifting section relative to the cylinder, A pump chamber partitioned by the cylinder and the piston, It has a downstream flow path extending from the pump chamber to the discharge port, The nozzle portion comprises a nozzle body and a nozzle tip that is fitted to the front end of the nozzle body. The nozzle tip has a tip circumferential wall extending in the direction of the nozzle axis, and a tip front end wall extending radially inward from the front end edge of the tip circumferential wall and forming the discharge port. The pump lifting mechanism receives an external force that lowers the stem portion relative to the cylinder against the biasing force of the spring portion, thereby discharging the contents from the pump chamber through the downstream flow path to the discharge port. Conversely, when the external force is released, the biasing force of the spring portion raises the stem portion relative to the cylinder, thereby drawing the contents from the container into the pump chamber. The downstream flow path has a flow path constriction section that narrows the flow path cross-sectional area between the pump chamber and the discharge port. A discharge container in which, when S1 is the cross-sectional area of ​​the downstream flow path at the stem portion and S2 is the cross-sectional area of ​​the flow path constriction portion, S2 is (1 / 14)S1 to (1 / 5)S1.

[0007] [2] The flow path throttling portion is provided in the stem portion, as described in [1], for the discharge container.

[0008] [3] A discharge container according to [1] or [2], which is held on the pump base so as to be able to swing in the front-rear direction and has a trigger portion that pushes down the stem portion when pulled backward. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a discharge container that can suppress the nozzle tip from becoming detached or partially detached due to the discharge pressure generated in the downstream flow path by the external force acting on the stem when the container falls in an inverted position. [Brief explanation of the drawing]

[0010] [Figure 1] This is a cross-sectional view showing a dispensing vessel of one embodiment of the present invention. [Figure 2] Figure 1 is a cross-sectional view showing what happens when the discharge container falls in an inverted position. [Modes for carrying out the invention]

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0012] As shown in Figure 1, in one embodiment of the present invention, the dispensing container 1 comprises a container 2 having a mouth portion 2a, a body portion 2b, and a bottom portion (not shown) connected in that order, and a pump 4 attached to the mouth portion 2a for dispensing the contents 3 inside the container 2. The contents 3 are not particularly limited, but in this embodiment they are liquid, for example, cosmetics.

[0013] The pump 4 includes a pump base 5 attached to the opening 2a and having a cylindrical cylinder 5a1 centered on a central axis O; a pump lifting section 6 having a piston 6a that slides on a sliding surface 5a2 on the inner circumferential surface of the cylinder 5a1, a stem section 6b that moves up and down relative to the cylinder 5a1 together with the piston 6a, and a nozzle section 7 that extends forward from the upper end of the stem section 6b and forms a discharge port 6c; a spring section 8 that generates a biasing force to raise the pump lifting section 6 relative to the cylinder 5a1; a pump chamber 9 partitioned by the cylinder 5a1 and the piston 6a; a downstream flow path 10 extending from the pump chamber 9 to the discharge port 6c; and a trigger section 11 that is held by the pump base 5 so as to be swingable in the front-rear direction and pushes down the stem section 6b when pulled backward.

[0014] In this embodiment, the direction along the central axis O is called the vertical direction, the direction from the bottom of the container 2 to the mouth 2a along the vertical direction is called the upward direction, the opposite direction is called the downward direction, the direction perpendicular to the central axis O is called the radial direction, and the direction that circles the central axis O is called the circumferential direction. Also, the direction along the nozzle axis P of the nozzle portion 7 is called the nozzle axis direction, the side of the nozzle portion 7 from the rear end (base end) to the front end (tip) along the nozzle axis direction is called the nozzle front end side, the opposite side is called the nozzle rear end side, the direction perpendicular to the nozzle axis P is called the nozzle radial direction, and the direction that circles the nozzle axis P is called the nozzle circumferential direction. Also, the direction perpendicular to both the vertical direction and the nozzle axis direction is called the left-right direction, and the direction perpendicular to both the vertical direction and the left-right direction is called the front-back direction.

[0015] In this embodiment, the nozzle portion 7 extends linearly from the upper end of the stem portion 6b, inclined upward toward the front. The discharge port 6c is located on the nozzle axis P.

[0016] The nozzle portion 7 has a nozzle main body portion 7a and a nozzle tip 7b that is attached to the front end portion of the nozzle main body portion 7a by fitting. The nozzle tip 7b has a tip peripheral wall 7b1 that extends in the nozzle axis direction and a tip front wall 7b2 that extends radially inward from the front edge of the tip peripheral wall 7b1 and forms a discharge port 6c. The nozzle main body portion 7a has a nozzle base portion 7a1 that is attached to the upper end portion of the stem portion 6b by fitting and a tip holding member 7a2 that is attached to the outer peripheral surface of the nozzle base portion 7a1 by fitting, and the nozzle tip 7b is attached to the tip holding member 7a2 by fitting.

[0017] The tip holding member 7a2 has a tip holding cylinder 7a3 that extends in the nozzle axis direction and has a cylindrical shape and fits onto the outer peripheral surface of the tip peripheral wall 7b1, a columnar body 7a4 that extends in the nozzle axis direction and has a columnar shape and fits onto the inner peripheral surface of the tip peripheral wall 7b1, and a plurality (three in this embodiment) of connecting portions 7a5 that are arranged at intervals in the circumferential direction and connect the rear end portions of the respective columnar bodies 7a4 to the tip holding cylinder 7a3. The content 3 flows through the inside of the nozzle base portion 7a1, between the connecting portions 7a5 adjacent to each other in the nozzle circumferential direction, between the inner peripheral surface of the tip peripheral wall 7b1 and the columnar body 7a4, and between the rear surface of the tip front wall 7b2 and the columnar body 7a4 in this order and reaches the discharge port 6c.

[0018] The stem portion 6b is composed of a cylindrical stem 6b1 centered on the central axis O, a piston guide 6b2 that is attached by fitting onto a lower fitting portion on the inner peripheral surface of the stem 6b1, and a nozzle mounting cylinder 6b3 that extends downward from the rear end portion of the nozzle base end portion and fits onto an upper fitting portion provided on the inner peripheral surface of the stem 6b1 above the lower fitting portion. The piston 6a is held by the stem portion 6b so as to be able to move up and down between the lower end portion of the stem 6b1 and the piston guide 6b2.

[0019] The pump lifting part 6 has an opening and closing part 12 that opens the downstream flow path 10 when the stem part 6b descends with respect to the cylinder 5a1 and closes the downstream flow path 10 when the stem part 6b ascends with respect to the cylinder 5a1. The opening and closing part 12 is formed by a piston 6a and a piston guide 6b2 at the upstream end of the downstream flow path 10 of the pump chamber 9, and opens when the piston guide 6b2 descends with respect to the piston 6a and closes when it ascends. Note that the opening and closing part 12 is not limited to the configuration formed by the piston 6a and the piston guide 6b2.

[0020] The pump 4 has a suction valve 13 that closes the upstream end of the pump chamber 9 when the pump lifting part 6 descends and opens the upstream end of the pump chamber 9 due to the negative pressure in the pump chamber 9 when it ascends. In this embodiment, the suction valve 13 is constituted by a ball valve, but it is not limited to this.

[0021] The pump base 5 has a cylinder member 5a, a mounting cap 5b, a trigger support member 5c, a unit 5d that can be used in both upright and inverted positions, and a pipe 5e.

[0022] The cylinder member 5a has a cylinder 5a1, a flange part 5a3 that extends radially outward from the upper end of the cylinder 5a1, and a fitting cylinder 5a4 that extends upward from the flange part 5a3. The mounting cap 5b has a mounting cylinder 5b1 that is screwed onto the outer peripheral surface of the mouth part 2a and a flange pressing part 5b2 that extends radially inward from the upper end of the mounting cylinder 5b1. The flange part 5a3 is held sandwiched in the vertical direction by the upper end surface of the mouth part 2a and the flange pressing part 5b2.

[0023] The trigger support member 5c is fitted to the fitting cylinder 5a4 and has a stopper part 5c1 that regulates the pump lifting part 6 from coming out upward from inside the cylinder 5a1, and a trigger support arm 5c2 that extends rearward and upward from the stopper part 5c1. The rear end part of the trigger part 11 is connected to the upper end part of the trigger support arm 5c2 so as to be swingable about a swing axis Q along the left - right direction.

[0024] The trigger portion 11 has a nozzle insertion opening 11a in the middle section connecting its front and rear ends, and the nozzle portion 7 penetrates the nozzle insertion opening 11a in the front-rear direction. The trigger portion 11 has a pressing portion 11b that presses down the upper end of the stem portion 6b (the rear end of the nozzle portion 7). The pressing portion 11b presses down the protrusions 6d that protrude on both the left and right sides at the upper end of the stem portion 6b. The portion of the trigger portion 11 located in front of and below the nozzle insertion opening 11a constitutes the operated portion 11c for rearward towing operations.

[0025] The pump 4 has a stopper 14 that can swing between a restricting position that restricts the descent of the pump lifting section 6 and an allowable position that allows the descent of the pump lifting section 6. The stopper 14 is supported by the retaining section 5c1 so as to be able to swing about the stopper swing axis R, and in the restricting position, the swinging end of the stopper 14 abuts against the lower surface of a projection 6e that is provided at the rear of the upper end of the stem section 6b and protrudes rearward, thereby restricting the descent of the pump lifting section 6. Due to the swing from the restricting position to the allowable position, the swinging end of the stopper 14 retracts rearward from directly below the projection 6e. Note that a configuration without the stopper 14 is also possible.

[0026] With the stopper 14 in the allowable position, the pump lifting section 6 receives an external force from the trigger section 11 that lowers the stem section 6b relative to the cylinder 5a1 against the biasing force of the spring section 8, thereby discharging the contents 3 from the pump chamber 9 through the downstream flow path 10 to the discharge port 6c. Conversely, when the external force is released, the biasing force of the spring section 8 raises the stem section 6b relative to the cylinder 5a1, thereby drawing the contents 3 from the container 2 into the pump chamber 9.

[0027] The inverted / upright unit 5d is fitted onto the lower end of the cylinder member 5a. The inverted / upright unit 5d also has an inlet 5d1 for the upright position, which introduces the contents 3 from inside the container 2 into the pump chamber 9 by the rise of the stem portion 6b relative to the cylinder 5a1 when the unit is upright, and an inlet 5d2 for the inverted position, which is located above the inlet 5d1 and introduces the contents 3 from inside the container 2 into the pump chamber 9 by the rise of the stem portion 6b relative to the cylinder 5a1 when the unit is inverted. The upper end of the pipe 5e, which sucks the contents 3 from inside the container 2, is attached to the inlet 5d1 for the upright position. Note that the inverted / upright unit 5d may not be provided in this configuration.

[0028] The downstream flow path 10 has a flow path throttling section 10a that narrows the flow path cross-sectional area between the pump chamber 9 and the discharge port 6c. The flow path throttling section 10a is provided at the upper end of the stem section 6b (directly above the pump chamber 9). The flow path throttling section 10a is formed as a single elongated flow path extending vertically along a circular cross-section centered on the central axis O. Note that the flow path throttling section 10a may be formed as two or more flow paths, may be provided in a part of the stem section 6b other than the upper end, or may be provided in the nozzle section 7.

[0029] In the stem portion 6b, the downstream flow path 10 has a nearly constant cross-sectional area S1, although its cross-sectional area is locally narrowed to S2 by the flow path constriction portion 10a at the upper end of the stem portion 6b. Therefore, it can be said that the cross-sectional area of ​​the downstream flow path 10 at the stem portion 6b is S1. In this embodiment, when the cross-sectional area of ​​the downstream flow path 10 at the stem portion 6b is S1 and the flow path cross-sectional area of ​​the flow path constriction portion 10a is S2, then S2 is (1 / 14)S1 to (1 / 5)S1. By providing a flow path constriction portion 10a with such a flow path cross-sectional area, it is possible to suppress the nozzle tip 7b from coming off or becoming detached due to the discharge pressure generated in the downstream flow path 10 by the external force acting from the trigger portion 11 to the stem portion 6b when the device falls in an inverted position as shown in Figure 2. When the flow path cross-sectional area S2 of the flow path constriction section 10a becomes smaller than (1 / 14)S1, the pulling operation during discharge becomes heavier, and when S2 becomes larger than (1 / 5)S1, the nozzle tip 7b detached or became partially detached in the tests described later. Therefore, from the viewpoint of enhancing this effect, it is preferable that S2 be between (1 / 14)S1 and (1 / 5)S1.

[0030] Although embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and the embodiments described above can be modified in various ways without departing from the spirit of the present invention. [Examples]

[0031] A discharge container according to the above embodiment was fabricated and dropped in an inverted position from a height of 70 cm to check for any problems such as the nozzle tip detaching or becoming dislodged (partially detached). As a comparative example, a discharge container with the same structure except for the absence of a flow path constriction was fabricated and the same test was performed. Three types of containers with different capacities (150 ml, 250 ml, and 280 ml) were prepared and filled with water. The ambient temperature was room temperature for all of them. [Table 1]

[0032] As shown in Table 1, in the small 150ml volume, neither the example nor the comparative example experienced any detachment or displacement of the nozzle tip. However, as the volume increased to 250ml and 280ml, the comparative example experienced nozzle tip displacement, while the example did not. [Explanation of symbols]

[0033] 1 Discharge container 2 containers 2a Mouth 2b Torso 3 Contents 4 pumps 5 Pump base 5a Cylinder member 5a1 Cylinder 5a2 Sliding surface 5a3 Flange section 5a4 fitting tube 5b Mounting cap 5b1 Mounting tube 5b2 Flange retaining part 5c Trigger support member 5c1 Retaining part 5c2 Trigger Support Arm 5d Upright and Inverted Unit 5d1 Inlet when upright position 5d2 Inlet for inverted position 5e pipe 6 Pump lifting section 6a Piston 6b Stem section 6b1 stem 6b2 Piston Guide 6b3 Nozzle mounting cylinder 6c outlet 6d convex part 6e Protrusion 7. Nozzle section 7a Nozzle body 7a1 Nozzle base 7a2 Chip holding member 7a3 Tip holding tube 7a4 columnar body 7a5 Connecting part 7b Nozzle Tip 7b1 Chip perimeter 7b2 Front end wall of the chip 8. Spring section 9 Pump Room 10 Downstream flow path 10a Flow channel constriction 11 Trigger section 11a Nozzle insertion port 11b Press down part 11c Operated part 12 Opening / Closing Section 13. Suction valve 14 Stopper O center axis P Nozzle axis Q: Oscillating axis R Stopper Oscillating Axis S1 Cross-sectional area S2 flow path cross-sectional area

Claims

1. A container having a mouth, body, and bottom arranged in this order, A pump base having a cylinder and attached to the aforementioned opening, A pump lifting section having a piston that slides on a sliding surface on the inner circumferential surface of the cylinder, a stem that moves up and down relative to the cylinder together with the piston, and a nozzle that extends forward from the upper end of the stem and forms a discharge port, A spring portion that generates a biasing force to raise the pump lifting section relative to the cylinder, A pump chamber partitioned by the cylinder and the piston, It has a downstream flow path extending from the pump chamber to the discharge port, The nozzle portion comprises a nozzle body and a nozzle tip that is fitted to the front end of the nozzle body. The nozzle tip has a tip circumferential wall extending in the direction of the nozzle axis, and a tip front end wall extending radially inward from the front end edge of the tip circumferential wall and forming the discharge port. The pump lifting mechanism receives an external force that lowers the stem portion relative to the cylinder against the biasing force of the spring portion, thereby discharging the contents from the pump chamber through the downstream flow path to the discharge port. Conversely, when the external force is released, the biasing force of the spring portion raises the stem portion relative to the cylinder, thereby drawing the contents from the container into the pump chamber. The downstream flow path has a flow path constriction section that narrows the flow path cross-sectional area between the pump chamber and the discharge port. The cross-sectional area of ​​the downstream channel at the stem portion is S １ The flow path cross-sectional area of ​​the flow path constriction portion is set to S. ２ When that happens, S ２ (1 / 14)S １ ~ (1 / 5 S) １ This is a dispensing container.

2. The discharge container according to claim 1, wherein the flow path throttling portion is provided in the stem portion.

3. The discharge container according to claim 1, which is held on the pump base so as to be able to swing in the front-rear direction and has a trigger portion that pushes down the stem portion when pulled backward.

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