JP6710455B2 - Discharge pump - Google Patents

Description

The present invention relates to a push-down head type discharge pump, and more particularly to a discharged head internal solution that can be received by both hands.

BACKGROUND ART Conventionally, as a push-down head type discharge pump, as described in, for example, Patent Document 1, a cylinder fixed to the mouth of a container for containing a content liquid and a cylinder in which the cylinder is slid up and down with an upward biasing state. It is known that a stem having a movable piston and a push-down head for discharging an internal solution sucked up through the stem from a nozzle are known.

JP, 2008-162671, A

In the conventional discharge pump described in Patent Document 1, the inner solution discharged when the push-down head is pushed down with one hand is received by the opposite hand. However, it is convenient if the inner solution can be received by both hands at the same time, for example, when the alcohol disinfectant is discharged.

The present invention was developed to solve the above problems, and an object of the present invention is to provide a push-down head type discharge pump capable of receiving discharged internal solution with both hands.

That is, the gist of the present invention is as follows.
1. A cylinder fixed to the mouth of the container for containing the content liquid, a stem having a piston that can slide up and down in the cylinder in an upwardly biased state, and a pusher for discharging the internal solution sucked up through the stem from a nozzle. In a discharge pump with a lowering head,
A storage chamber that stores the internal solution fed from the stem by pressing down the pressing head under pressure, and discharges the stored internal solution from the nozzle when the pressing head rises;
The hold-down head comprises an upper cylinder having an internal cross-sectional area greater than that of the cylinder,
The stem includes an upper piston that is vertically slidable in the upper cylinder,
A discharge pump, wherein the storage chamber is formed by the upper cylinder and the upper piston.

2. The discharge pump according to claim 1, wherein the push-down head includes an opening/closing unit that shuts off communication between the storage chamber and the nozzle when the push-down head is pushed down, and opens the shut-off when the push-down head is raised. ..

3. The pressing head includes a lower head having the upper cylinder, and an upper head having the nozzle and attached to the lower head so as to be vertically movable.
One of the lower head and the upper head includes an annular opening/closing valve seat that surrounds a flow path connected to the nozzle,
The other of the lower head and the upper head includes an opening/closing valve body that can be seated on the opening/closing valve seat,
The discharge pump according to the second aspect, wherein the opening/closing portion is formed by the opening/closing portion valve seat and the opening/closing portion valve body.

4. The discharge pump according to any one of 1 to 3, further comprising a sealing portion that blocks communication between the storage chamber and the nozzle when the push-down head is at an upper end position.

5. One of the push-down head and the stem includes an annular sealing portion valve seat that surrounds a flow path connected to the nozzle,
The other of the pressing head and the stem is provided with a sealing portion valve body that can be seated on the sealing portion valve seat,
5. The discharge pump according to 4, wherein the sealing portion is formed by the sealing portion valve seat and the sealing portion valve body.

6. 6. The discharge pump according to any one of 1 to 5 above, further comprising a holding cylinder that holds the pressing head with respect to the cylinder so that the pressing head can move up and down and cannot come out upward by engaging with the pressing head.

7. 7. The discharge pump according to 6, wherein the container is equipped with a mounting cap for fixing the cylinder to the mouth of the container, and the mounting cap includes the holding cylinder.

In the present invention, since the upper cylinder of the stem has an internal cross-sectional area larger than the internal cross-sectional area of the cylinder, the pressure of the content liquid causes the stem to move downward with respect to the pressing head when the pressing head is pressed. It can be moved so that the internal solution can be stored under pressure in the reservoir. Therefore, according to the present invention, the internal solution fed from the stem by the pressing of the pressing head can be stored in the storage chamber under pressure, and the stored internal solution can be discharged from the nozzle when the pressing head is raised. ..

Therefore, according to the present invention, it is possible to provide a push-down head type discharge pump capable of receiving the discharged inner solution with both hands.

FIG. 3 is a side sectional view of the discharge pump according to the embodiment of the present invention, showing a state before the pressing down of the pressing head is started. FIG. 2 is a cross-sectional view in an enlarged side view showing an opening/closing part and a sealing part of the discharge pump of FIG. 1, where (a) shows a state in which communication between the storage chamber and the nozzle is blocked by the sealing part, b) shows a state in which the communication between the storage chamber and the nozzle is blocked by the opening/closing portion. FIG. 2 is a cross-sectional view of the discharge pump of FIG. 1 as seen from a side, showing a state in which the push-down head is pushed down. FIG. 2 is a partial cross-sectional view of the discharge pump of FIG. 1 as seen from the side, showing the state when the pressing down of the pressing head is completed. FIG. 2 is a partial cross-sectional view of the discharge pump of FIG. 1 as seen from the side, showing a state where the push-down head has been completely lifted.

Hereinafter, the discharge pump 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.
In the present specification, the up-down direction means the direction along the central axis O of the cylinder 1, and the upper side is the side on which the push-down head 3 is arranged with respect to the cylinder 1 (for example, the upper side in FIG. 1). , The lower side is the opposite side. Further, the side on which the nozzle 10g is located with respect to the central axis O of the cylinder 1 is the front, and the opposite side is the rear. Further, the lateral direction when viewed from the front to the rear is defined as the lateral direction.

As shown in FIG. 1, the discharge pump 100 according to this embodiment includes a cylinder 1, a stem 2, and a push-down head 3. The cylinder 1 is fixed to the mouth portion Ca of the container C containing the content liquid by the mounting cap 4. A seat surface 1a is formed on the inner peripheral side of the lower portion of the cylinder 1, and a valve element 5 having an elastic valve 5a that can be seated on the seat surface 1a is arranged.

A biasing member (a coil spring in this embodiment) 6 that biases the stem 2 upward is disposed between the valve body 5 and the stem 2. The stem 2 has an annular piston 2a that can slide up and down in the cylinder 1, and a cylindrical stem body 2b that extends upward from the inner peripheral side of the piston 2a. A check valve (ball valve in this embodiment) 7 is formed on the inner peripheral surface of the stem body 2b to prevent the internal solution from flowing backward.

Further, the stem 2 has an upper piston 2c which is vertically slidable in the cylindrical upper cylinder 9a of the push-down head 3. The upper piston 2c has an annular shape, and its inner peripheral side is connected to the upper end of the stem body 2b. Further, the valve body 2e for the sealing portion is connected to the inner peripheral side of the upper piston 2c via a plurality of connecting pieces 2d arranged at intervals in the circumferential direction. A communication hole for communicating the space inside the stem body 2b and the space inside the upper cylinder 9a is formed between the plurality of connecting pieces 2d. The valve body 2e for the sealing portion has a projection shape protruding upward.

In the present embodiment, the stem 2 is configured by fitting and fixing the lower stem member 2A and the upper stem member 2B to each other. However, the stem 2 may be composed of a single member or may be composed of three or more members.

The mounting cap 4 is configured to fix the cylinder 1 to the mouth Ca by being mounted on the mouth Ca of the container C. In addition, in this embodiment, the mounting cap 4 is configured to be mounted on the mouth portion Ca by screwing, but may be configured to be mounted by fitting by overcoming the undercut shape.

Further, the mounting cap 4 is provided with a holding cylinder 8 that engages with the push-down head 3 to hold the push-down head 3 with respect to the cylinder 1 so that the push-down head 3 can move up and down and cannot come out upward. The holding cylinder 8 does not necessarily have to be provided on the mounting cap 4 as long as the holding cylinder 8 can be held by the pressing head 3 so that the pressing head 3 can be moved vertically with respect to the cylinder 1 and cannot be pulled out upward. .. For example, the holding cylinder 8 may be formed integrally with the cylinder 1 or may be configured to be fittable into the cylinder 1.

The holding cylinder 8 has a tubular shape extending in the vertical direction, and a step portion 8a for reducing the diameter of the upper portion is provided at an intermediate portion of the inner peripheral surface in the vertical direction. The cylindrical upper cylinder 9a of the push-down head 3 has an engagement protrusion 9b that prevents the push-down head 3 from coming out upward by engaging with the stepped portion 8a.

A push-down head 3 is arranged above the stem 2. The push-down head 3 includes a lower head 9 having an upper cylinder 9a that houses the upper piston 2c of the stem 2, and an upper head 10 that is attached to the lower head 9 so as to be vertically movable.

The cylindrical upper cylinder 9 a included in the lower head 9 has an internal cross-sectional area larger than that of the cylinder 1. Here, the "internal cross-sectional area" means a cross-sectional area in a cross section orthogonal to the central axis O of the upper cylinder 9a or the cylinder 1. A disc-shaped upper wall 9c is connected to the upper end of the upper cylinder 9a. A through hole 9d is formed in the center of the upper wall 9c. A cylindrical wall 9e extending upward is provided on the outer peripheral edge of the upper wall 9c.

The upper head 10 includes a peripheral wall 10a that engages with the cylindrical wall 9e of the lower head 9 so as not to slip upward, and a disk-shaped top wall 10b that is continuous with the upper end of the peripheral wall 10a. A plurality of through holes 10c are intermittently provided around the top wall 10b along the peripheral wall 10a, and extension portions 9f that can be inserted into the through holes 10c are intermittently provided at the upper end edge of the cylindrical wall 9e. It is set around. A protrusion 9g is formed on the outer peripheral side of each extension 9f, and a protrusion 10d engageable with the protrusion 9g is formed on the inner peripheral surface of the peripheral wall 10a.

The top wall 10b of the upper head 10 is provided with a cylindrical guide wall 10e that hangs down on the inner peripheral side of the peripheral wall 10a. The guide wall 10e is adapted to be in sliding contact with the inner peripheral surface of the cylindrical wall 9e of the lower head 9.

On the inner peripheral side of the guide wall 10e, a hanging cylinder 10f hangs from the top wall 10b. On the inner peripheral surface of the hanging cylinder 10f, a standing cylinder 9h which is erected on the upper wall 9c of the lower head 9 is arranged so as to be liquid-tight and vertically slidable. It is also possible to reverse the arrangement of the hanging cylinder 10f and the standing cylinder 9h, and to arrange the standing cylinder 9h on the outer peripheral surface of the hanging cylinder 10f so as to be liquid-tight and vertically slidable. In any case, the drooping cylinder 10f and the standing cylinder 9h form a flow path of the internal solution connected to the nozzle 10g.

On the inner peripheral side of the hanging cylinder 10f, an opening/closing valve body 10h having a pin shape extending in the vertical direction hangs from the ceiling wall 10b. When the upper head 10 is at a position moved upward with respect to the lower head 9 as shown in FIG. 1, the opening/closing valve body 10h has a through hole 9d in the upper wall 9c as shown in FIG. 2(a). A gap serving as a flow path for the content liquid is formed between the inner peripheral surface and the inner peripheral surface. Further, when the upper head 10 is in a position where the upper head 10 is moved downward with respect to the lower head 9 as shown in FIG. 3, the opening/closing valve body 10h is located inside the through hole 9d as shown in FIG. 2(b). It is configured to be seated on the valve seat 9d1 for the opening/closing part constituted by the peripheral surface and to block the flow path. The opening/closing valve seat 9d1 has an annular shape and surrounds a flow path connected to the nozzle 10g.

As shown in FIGS. 3 and 4, the discharge pump 100 stores under pressure the internal solution fed from the stem 2 by pressing down the pressing head 3, and as shown in FIG. 5, presses down the stored internal solution. A storage chamber 11 for ejecting from the nozzle 10g when the head 3 is raised is provided. The storage chamber 11 is formed by the upper cylinder 9a, the upper piston 2c, and the upper wall 9c described above.

Further, in the discharge pump 100, an opening/closing unit which, when the push-down head 3 pushes down the push-down head 3, shuts off the communication between the storage chamber 11 and the nozzle 10g, and opens the shut-off when the push-down head 3 rises. 12 (see FIG. 2). In the present embodiment, the opening/closing part 12 is formed by the opening/closing part valve seat 9d1 and the opening/closing part valve body 10h. The opening/closing part 12 is not limited to such a configuration. For example, the upper head 10 is provided with an annular opening/closing part valve seat surrounding the flow passage connected to the nozzle 10g, and the lower head 9 is seated on the opening/closing part valve seat. An openable/closable valve body may be provided, and the open/closed portion may be configured by the open/closed valve seat and the open/closed valve body.

Further, as shown in FIGS. 1 and 2(a), the discharge pump 100 includes a sealing portion 13 that blocks the communication between the storage chamber 11 and the nozzle 10g when the pressing head 3 is at the upper end position. There is. In the present embodiment, an annular sealing portion valve seat 9d2 that is formed by the lower end edge of the through hole 9d formed in the upper wall 9c of the push-down head 3 and surrounds the flow path that is connected to the nozzle 10g, and the stem 2 is provided. The sealing portion 13 is formed by the sealing portion valve body 2e that can be seated on the sealing portion valve seat 9d2. The sealing portion 13 is not limited to such a configuration. For example, the stem 2 is provided with an annular sealing portion valve seat surrounding the flow path connected to the nozzle 10g, and the pressing head 3 (lower head 9) is provided. A sealing portion valve body that can be seated on the sealing portion valve seat may be provided, and the sealing portion may be configured by the sealing portion valve seat and the sealing portion valve body.

With this configuration, the internal solution can be discharged in the following manner. First, when the push-down head 3 is pushed down when the push-down head 3 is at the upper end position as shown in FIG. 1, the upper head 10 which is directly pushed moves downward with respect to the lower head 9, As shown in b), the opening/closing valve body 10h is seated on the opening/closing valve seat 9d1, and the communication between the storage chamber 11 and the nozzle 10g is blocked.

Then, as shown in FIG. 3, when the push-down head 3 is further pushed down, the stem 2 is pushed down together with the push-down head 3 so that the pressure of the content liquid below the check valve 7 increases and the check valve 7 is opened. When opened, the content liquid flows into the storage chamber 11. At this time, since the upper cylinder 9a has an internal cross-sectional area larger than that of the cylinder 1, the pressure of the content liquid acts to move the stem 2 downward with respect to the push-down head 3. .. Therefore, when the push-down head 3 is pushed down, the content liquid is sent from the stem 2 to the storage chamber 11 and is stored in the storage chamber 11 under pressure.

As shown in FIG. 4, when the pressing head 3 reaches the lower end position, or when the pressing of the pressing head 3 is stopped before reaching the lower end position, the pressure in the storage chamber 11 causes the upper head 10 to move toward the lower head 9. And moves upward to open the cutoff of the communication between the storage chamber 11 and the nozzle 10g. Therefore, as shown in FIG. 5, the inner solution is discharged from the nozzle 10g while the push-down head 3 moves up.

As described above, in the discharge pump 100 according to the present embodiment, it is possible to prevent the inner solution from being discharged when the push-down head 3 is pushed down, and to discharge the inner solution when the push-down head 3 is raised. The hand holding down the head 3 can be moved to the nozzle side to receive the internal solution. Therefore, it is possible to receive the inner solution with both hands. Examples of preferable internal solution include alcohol disinfectant, but not limited to this, various liquids such as cosmetics and liquid soap can be used as the internal solution.

As described above, the discharge pump 100 according to the present embodiment is capable of sliding up and down in the cylinder 1 fixed to the mouth portion Ca of the container C containing the content liquid and in the cylinder 1 in the upward biased state. A stem 2 having a flexible piston 2a, and a pressing head 3 for discharging the internal solution sucked up through the stem 2 from a nozzle 10g. The internal solution fed from the stem 2 by pressing the pressing head 3 is pressurized. The upper cylinder 9a is provided with a storage chamber 11 for accommodating and discharging the contained internal solution from the nozzle 10g when the push-down head 3 rises. The push-down head 3 has an internal cross-sectional area larger than that of the cylinder 1. The stem 2 is provided with an upper piston 2c that is vertically slidable in the upper cylinder 9a, and the storage chamber 11 is formed by the upper cylinder 9a and the upper piston 2c.

Further, in the discharge pump 100 according to the present embodiment, the push-down head 3 blocks the communication between the storage chamber 11 and the nozzle 10g when the push-down head 3 is pushed down, and cuts off the shut-down head 3 when the push-down head 3 rises. It is configured to include an opening/closing part 12 for opening the. Therefore, according to the present embodiment, it is possible to store the internal solution in the storage chamber 11 when the push-down head 3 is pushed down and to discharge it when the push-down head 3 is raised with a simple configuration.

Further, in the discharge pump 100 according to the present embodiment, the push-down head 3 includes a lower head 9 having an upper cylinder 9a, and an upper head 10 having a nozzle 10g and vertically attached to the lower head 9. One of the lower head 9 and the upper head 10 is provided with an annular opening/closing valve seat 9d1 surrounding the flow path connected to the nozzle 10g, and the other of the upper head 10 and the lower head 9 is an opening/closing valve. The seat 9d1 is provided with an open/close valve body 10h that can be seated, and the open/close portion 12 is formed by the open/close valve seat 9d1 and the open/close valve body 10h. Therefore, according to the present embodiment, the opening/closing part 12 can be formed with a simple configuration.

Further, the discharge pump 100 according to the present embodiment is configured to include the sealing portion 13 that blocks the communication between the storage chamber 11 and the nozzle 10g when the pressing head 3 is at the upper end position. Therefore, according to the present embodiment, with a simple configuration, it is possible to prevent the content liquid from leaking out from the nozzle 10g when the container C falls over.

Further, in the discharge pump 100 according to the present embodiment, one of the push-down head 3 and the stem 2 is provided with the annular seal portion valve seat 9d2 surrounding the flow path connected to the nozzle 10g. The other of the two includes a sealing portion valve body 2e that can be seated on the sealing portion valve seat 9d2, and the sealing portion 13 is formed by the sealing portion valve seat 9d2 and the sealing portion valve body 2e. It is configured to be. Therefore, according to the present embodiment, the sealing portion 13 can be formed with a simple structure.

Further, the discharge pump 100 according to the present embodiment has the holding cylinder 8 that holds the pressing head 3 so that the pressing head 3 can be moved vertically with respect to the cylinder 1 and cannot be pulled out upward by engaging the pressing head 3. It is configured to prepare. Therefore, according to the present embodiment, it is possible to maintain the connection state between the push-down head 3 and the cylinder 1 with a simple configuration.

Further, the discharge pump 100 according to the present embodiment includes a mounting cap 4 that is mounted on the opening Ca of the container C to fix the cylinder 1 to the opening Ca, and the mounting cap 4 includes a holding cylinder 8. Is configured. Therefore, according to the present embodiment, it is possible to further simplify the configuration.

The above description merely shows one embodiment of the present invention, and it goes without saying that various modifications may be made in the claims.

1 Cylinder 1a Seat surface 2 Stem 2a Piston 2b Stem body 2c Upper piston 2d Connecting piece 2e Sealing valve body 2A Lower stem member 2B Upper stem member 3 Push down head 4 Mounting cap 5 Valve body 5a Elastic valve 6 Energizing Member 7 Check valve 8 Holding cylinder 8a Step 9 Lower head 9a Upper cylinder 9b Engagement protrusion 9c Upper wall 9d Through hole 9d1 Opening/closing valve seat 9d2 Sealing valve seat 9e Cylindrical wall 9f Extension 9g Projection 9h Standing cylinder 10 Upper head 10a Peripheral wall 10b Top wall 10c Through hole 10d Protrusion 10e Guide wall 10f Pendant cylinder 10g Nozzle 10h Valve for opening/closing part 11 Storage chamber 12 Opening/closing part 13 Sealing part 100 Discharge pump O Axis C container Ca mouth

Claims (7)

A cylinder fixed to the mouth of the container for containing the content liquid, a stem having a piston that can slide up and down in the cylinder in an upwardly biased state, and a pusher for discharging the internal solution sucked up through the stem from a nozzle. In a discharge pump with a lowering head,
A storage chamber that stores the internal solution fed from the stem by pressing down the pressing head under pressure, and discharges the stored internal solution from the nozzle when the pressing head rises;
The hold-down head comprises an upper cylinder having an internal cross-sectional area greater than that of the cylinder,
The stem includes an upper piston that is vertically slidable in the upper cylinder,
A discharge pump, wherein the storage chamber is formed by the upper cylinder and the upper piston. The press-down head includes an opening/closing unit that blocks communication between the storage chamber and the nozzle when the press-down head is pressed down, and opens the blockage when the press-down head rises. Discharge pump. The pressing head includes a lower head having the upper cylinder, and an upper head having the nozzle and attached to the lower head so as to be vertically movable.
One of the lower head and the upper head includes an annular opening/closing valve seat that surrounds a flow path connected to the nozzle,
The other of the lower head and the upper head includes an opening/closing valve body that can be seated on the opening/closing valve seat,
The discharge pump according to claim 2, wherein the opening/closing portion is formed by the opening/closing portion valve seat and the opening/closing portion valve body. The discharge pump according to claim 1, further comprising a sealing portion that blocks communication between the storage chamber and the nozzle when the push-down head is at the upper end position. One of the push-down head and the stem includes an annular sealing portion valve seat that surrounds a flow path connected to the nozzle,
The other of the pressing head and the stem is provided with a sealing portion valve body that can be seated on the sealing portion valve seat,
The discharge pump according to claim 4, wherein the sealing portion is formed by the sealing portion valve seat and the sealing portion valve body. The holding cylinder which holds the push-down head so that the push-down head can be moved up and down with respect to the cylinder and cannot be pulled out upward by engaging with the push-down head. The described discharge pump. The discharge pump according to claim 6, further comprising: a mounting cap that is mounted on the mouth of the container to fix the cylinder to the mouth, and the mounting cap includes the holding cylinder.

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