JPH08182944A - Push type dispenser - Google Patents

Abstract

PURPOSE: To prevent the intrusion of water, etc., into a container by setting at least the top end of the through-hole of a chaplet inserted with a piston at the smallest possible diameter, providing the upper surface of this chaplet with a large-diameter annular recessed part and boring the base of this annular recessed part with a drain hole. CONSTITUTION: The piston 14 is pushed in when a nozzle head 11 is pushed in. The liquid in a cylinder 12 is then pressurized and this pressurized liquid flows out of a nozzle 11a. The nozzle head 11 is pushed up together with the piston 14 and is returned to an initial position and the liquid in a container 18 is sucked up by as much as the corresponding amt. into the cylinder 12 when the pressing force on the nozzle head 11 is removed. In such a case, the through-hole 22a of the chaplet 22 inserted with the piston 14 is formed to the smallest possible diameter. The upper surface of the chaplet 22 is provided with the annular recessed part 36 of the diameter larger than the diameter at the top end of the cylinder 14 and the base of this annular recessed part 36 is bored with the drain hole 38. As a result, the intrusion of the water, hot water, etc., into the container 18 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push type dispenser which sucks and pressurizes a liquid into a cylinder and causes the liquid to flow out by reciprocating movement of a piston which is interlocked with pushing of a nozzle head.

[0002]

2. Description of the Related Art A push-type dispenser that sucks up a liquid by pushing a nozzle head, pressurizes the liquid, and discharges the liquid from a nozzle is well known as a dispenser mounted on a container such as shampoo or rinse.

As shown in FIG. 4, a conventional push-type dispenser 110 is detachably attached to a mouth of a container 118 by a bottle cap 124 and has a nozzle head 111.
Piston 114 in cylinder 112
The liquid is sucked up from the container and pressurized to flow out from the nozzle 111a by sliding (reciprocating). A return spring 120 is built in the cylinder 112 and pushes up the nozzle head 111 to its initial position.
The nozzle head is pushed against the biasing force of the return spring.

Here, a member called a chaplet 122, for example, a member with a female screw is fixed to the upper end of the cylinder, the nozzle head 111 is pushed in, and the male screw 132 of the nozzle head is screwed into the female screw 134 of the chaplet 122. It is possible to transport and display the dispenser 110 of. In this way, by fixing the nozzle head 111 at the push-in position,
It is impossible to push in the nozzle head and cause the outflow of the liquid due to it, and it is possible to reliably prevent an unexpected outflow (liquid leakage) of the liquid during transportation and display. In addition, the dispenser 110 becomes shorter, and the space required for transportation and exhibition is reduced.

When the nozzle head 111 and the chaplet 122 are unscrewed for use, the return spring 120 causes the nozzle head to be pushed up together with the piston 114 from the pushed-in position to return to the initial position. Then, when the nozzle head 111 at the initial position is pushed in and the piston 114 is reciprocated, the liquid is pressurized and flows out.

[0006]

When the liquid in the container is pressurized and flows out, the liquid level in the container is lowered, and if the outside air is not replenished, the inside of the container becomes negative pressure and the subsequent liquid outflow. It will be difficult. Therefore, in the dispenser 110, for example, a ventilation hole (negative pressure prevention hole) 130 is formed in the side wall of the cylinder 112.

In this structure, when the piston 114 slides with respect to the cylinder 112, a negative pressure inside the container 118 is prevented by ventilating the outside air through the gap between the piston peripheral surface and the ventilation hole 130.

By the way, for example, a recess 136 is formed in the chaplet so that the male screw 132 of the nozzle head can be screwed into the female screw 134 of the chaplet 122. The chaplet recess 136 is usually provided continuously to the through hole 122a, and the bottom of the recess is closed to the piston 114 by an integral seal piece 123.

Since the recess 136 is located below the upper surface of the chaplet 122, water drops, dust and the like are likely to collect in the recess. Especially, the dispenser attached to a container such as shampoo and conditioner is used in bathrooms and washrooms where water and hot water are likely to be splashed, so the water and hot water splashed on the dispenser should be recessed, that is, around the piston. Easy to stay.

However, as mentioned above, the piston 11
Since there is a ventilation gap around 4, the water and hot water that has accumulated in the recess 136 flows into the cylinder, that is, the container through the gap around the piston under the reciprocating motion of the piston. . The inflow (mixing) of water and hot water into the cylinder and the container dilutes the liquid in the container and reduces the effectiveness of the liquid, so that the quality is not maintained and it becomes difficult to completely use up the liquid.

Further, if dust or the like accumulated in the recess 136 is mixed in the container, the liquid may be contaminated and the quality may be deteriorated, or the valve may be prevented from coming into close contact with the valve seat to make it difficult for the liquid to flow out. is there.

Furthermore, foreign liquids such as detergents of other kinds are recessed 13
When it flows into the container from 6 through the through hole 122a, it causes a chemical change in the liquid such as shampoo and rinse in the container, and the quality of the liquid originally contained in the container is significantly deteriorated and the safety is impaired. There is even fear.

An object of the present invention is to provide a push type dispenser which prevents water and the like from entering the container.

[0014]

To achieve this object, according to the present invention, the through hole of the chaplet is formed in the minimum diameter that can ensure the sliding of the piston and the ventilation on the peripheral surface. . Then, a ring-shaped recess having a diameter larger than the diameter of the fixed cylinder upper end is provided on the upper surface of the chaplet, an internal thread is formed on the outer peripheral surface in the ring-shaped recess, and at least a single penetrating hole is formed on the bottom surface of the ring-shaped recess. A drain hole is provided.

[0015]

In this structure, since the recess in which the female thread of the chaplet is formed is formed as a large-diameter ring-shaped recess and isolated from the through hole, even if water or hot water flows into the ring-shaped recess, Water does not accumulate on the peripheral surface of the piston. Further, since the through hole of the chaplet is formed to have the minimum diameter capable of ensuring the sliding of the piston and ventilation on the peripheral surface, it is possible to reliably prevent water, hot water, etc. from entering the container.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIG. 1, a push-type dispenser 10 according to the present invention comprises a push-in nozzle head 11, a cylinder 12, and a piston 14 which reciprocates in the cylinder in association with the nozzle head. ing. The dispenser 10 is detachably attached to the container 18 and sucks and pressurizes liquid such as shampoo and rinse in the container into the cylinder 12 under the reciprocating motion of the piston 14 which is interlocked with the pushing of the nozzle head 11. It is configured to drain.

The nozzle head 11 integrally includes a substantially horizontal nozzle (beak) 11a having a defined outflow path and a vertical stem 11b, and liquid is flown out from the end (outflow port) of the outflow path of the nozzle. . Then, for example, the piston 14 is integrally connected and fixed to the nozzle head 11 by fitting the upper end to the stem 11b.

Note that, for example, a secondary valve 19 is disposed inside the stem 11b of the nozzle head so as to be in close contact with the upper end of the piston 14, and the flow of liquid from the piston can be controlled by opening and closing the secondary valve. Is configured to control.

The piston 14 is formed, for example, in a hollow shape integrally having a skirt-shaped seal piece 14b slidably contacting the inner surface of the cylinder 12 at the lower end thereof, and resists the biasing force of the return spring 20 such as a compression coil spring. It is disposed inside the cylinder so that it can be pushed in. Then, a chaplet having a through hole 22a through which the piston 14 can be inserted and slidable is provided in the center.
22 is fitted on the upper end of the cylinder 12, and the piston is slidably and irremovably attached to the cylinder.

Further, the bottle cap 24 having the female screw 24a on the inner surface is provided with the flange 12a of the cylinder 12 and the chaplet.
It is provided so as not to be detachable and rotatable with respect to 22.
Then, the cylinder 12 is inserted from the mouth of the container 18 and the female screw for the male screw (not shown) of the container mouth
The bottle cap 24, that is, the dispenser 10 is detachably attached to the container under the screwing of the 24a.

A primary valve 25 is arranged below the piston 14 inside the cylinder 12, and the flow of liquid in the cylinder is controlled by opening and closing the primary valve.

In the dispenser 10 having such a structure,
Due to the negative pressure of the cylinder 12 at the previous stroke, the liquid in the container 18 is sucked into the suction tube 26 at the lower end of the cylinder.
It is sucked up into the cylinder in advance through the primary valve 25.

Then, when the nozzle head 11 is pushed again against the biasing force of the return spring (compression coil spring) 20, the piston 14 is pushed (lowered) while slidingly contacting the cylinder 12, and the liquid inside the cylinder is pushed. Is pressurized, and the pressurized liquid is discharged from the tip (outlet) of the nozzle 11a of the nozzle head through the inside of the piston and the secondary valve 19 (see FIG. 2).

When the pushing force on the nozzle head 11 is removed, the nozzle head is pushed up together with the piston 14 and returned to the initial position shown in FIG. 1 under the biasing force of the return spring 20. This nozzle head 11, that is, the piston
By pushing up 14, the cylinder 12 is made negative pressure, and the liquid is sucked up from the container 18 to the cylinder by a corresponding amount.

As shown in FIG. 1, in such a dispenser 10, for example, a ventilation hole 30 communicating with the inside of the container 18 is formed in the side wall of the cylinder 12. In such a configuration, by pushing in the nozzle head 11,
Since the gap between the piston 14 and the peripheral surface of the chaplet through hole 22a and the ventilation hole 30 are communicated with each other, the inside of the container 18 is communicated with the outside air through the gap and the ventilation hole.

Therefore, the piston 14 and the chaplet through hole
Outside air flows into the inside of the container 18 through the gap between the peripheral surfaces of 22a and the ventilation hole 30 to prevent negative pressure inside the container, thereby ensuring smooth outflow of the liquid.

By the way, as shown in FIG. 1, in such a dispenser 10, a pair of male and female screws, that is, a pair of screws 32 and a female screw 34 are provided in the nozzle head 11 and the chaplet 22, respectively. The dispenser is transported and displayed by fixing the nozzle head in the pushed-in position under the screwing of the screw and the female screw (see FIG. 2). Normal,
The male screw is on the nozzle head 11, and the female screw 34 is on the chaplet 22.
Are provided respectively.

As a result, the nozzle head 11 and the piston 14 cannot be pushed in and the resulting outflow of liquid cannot be performed, and unexpected outflow of liquid (liquid leakage) at the time of transportation and exhibition is prevented. Further, the dispenser 10 becomes short, and the space required for transportation and exhibition is reduced.

Here, in the present invention, the through hole 22a of the chaplet is set to the minimum diameter that can ensure the sliding of the piston 14 and the ventilation on the peripheral surface, and as shown in FIGS. 1 and 3 (A). As shown, a ring-shaped recess 36 that is discontinuous with the through hole is provided on the upper surface of the chaplet 22, and a female screw 34 is formed on the outer peripheral surface of the ring-shaped recess. Male thread 32
Are formed on the outer peripheral surface of the lower end of the nozzle head 11, for example.

For example, if the diameter of the through hole 22a of the chaplet is set so that the sliding of the piston 14 can be guaranteed,
A gas-permeable gap is inevitably formed between the peripheral surface of the piston and the through hole. That is, by setting the minimum diameter that can ensure smooth sliding of the piston 14 as the diameter of the through hole 22a of the chaplet, ventilation can be easily ensured on the circumferential surface of the piston.

As can be seen from FIG. 1, the ring-shaped recess 36 has a diameter larger than the diameter of the upper end of the fixed cylinder 12, for example. That is, the chaplet 22 is formed so that the upper end of the cylinder 12 can be fitted from below into the groove 37 between the stem 11b and the ring-shaped recess 36 (FIG. 3).
(See (B)).

As shown in FIGS. 1 and 3 (B), a drain hole 38 is formed through the bottom of the ring-shaped recess 36 of the chaplet. The water draining holes 38 are, for example, arcuate long holes provided at four places separated by equal intervals.

In such a structure, the recess of the chaplet 22 for the internal thread 34 is provided as a ring-shaped recess 36 having a larger diameter than the upper end of the cylinder 14 and is isolated from the through hole 22a, and therefore the dispenser 10 is provided with the recess. Even if the splashed water or hot water enters the ring-shaped recess, the water or the like does not stay in contact with the piston 14.

Since the ring-shaped recess 36 has a larger diameter than the upper end of the cylinder 12, the drain hole 38 at the bottom of the ring-shaped recess is located above the bottle cap 24, as can be seen in FIG. Is connected to the outside. That is, even if the water or hot water that has entered the ring-shaped recess 36 flows out through the water drain hole 38, it does not enter the container 18 and is reliably discharged to the outside.

Therefore, even if water or hot water splashed on the dispenser 10 enters the ring-shaped recess 36, the water or the like is discharged to the outside without staying in the ring-shaped recess. Further, even if dust or the like enters the ring-shaped recess 36 of the chaplet, it is discharged to the outside together with water and hot water from the drain hole 38, so that the retention of dust or the like in the ring-shaped recess is assured like water. To be prevented.

In the present invention, the through hole 22a of the chaplet is formed to have the minimum diameter that can ensure the sliding of the piston 14 and the ventilation on the peripheral surface. That is,
Since the ring-shaped recess 36 is provided separately from the through-hole 22a of the chaplet, in addition to preventing water from staying around the piston 14, the inflow of water and hot water from the circumferential surface of the piston is sufficiently suppressed. Also from this point, mixing of water and the like into the container 18 is sufficiently prevented.

Therefore, according to the push type dispenser 10 of the present invention, the liquid inside the container 18 such as shampoo and rinse is not diluted by the mixing of water and hot water, so that the liquid caused by the mixing of water etc. There is no reduction in efficacy. As a matter of course, the inflow of a liquid such as a detergent accompanied by a chemical change is also prevented, and a chemical change that impairs safety is prevented in advance. Further, the liquid is not contaminated by the inclusion of dust or the like, and the dust or the like does not interfere with the opening and closing of the valve.

Since it is sufficient that the ring-shaped recess 36 of the chaplet is provided so as to be separated from the piston 14 and the diameter of the through hole 22a is formed to the minimum that can ensure the sliding of the piston 14 and the ventilation on the peripheral surface, A seal piece or the like that is in close contact with the circumferential surface of the piston can be omitted from the chaplet. Therefore, the structure of the chaplet 22 can be simplified.

Here, if the upper end opening 40 of the through hole 22a is located above the opening end 36a of the ring-shaped recess 36 and the upper surface 22b between the through hole and the ring-shaped recess is formed as a slope inclined outward. Good. In such a configuration, water, hot water splashed near the upper end opening of the through hole 22a of the chaplet, water that adheres to the peripheral surface of the piston 14 and is peeled off by the upper end opening of the through hole 22b is used as the upper surface (slope) 22b And flows outward through the drainage hole 38 of the ring-shaped recess and is discharged to the outside.

That is, according to this structure, since the retention of water or the like at the position where it comes into contact with the piston 14 is blocked by the upper surface 22b formed of the sloped surface, the contamination of water or the like into the container 18 can be more reliably performed. To be prevented.

Here, in the embodiment, as shown in FIG. 3 (B), the water drain holes 38 on the bottom surface of the ring-shaped recess of the chaplet 22 are illustrated as four long holes which are equally spaced. However, it is only necessary to provide water, hot water, etc. at one or more locations, so the water drain hole of the chaplet
The number, shape, and arrangement of 38 are not limited to the illustrated configuration.

Further, the upper surface 22b between the through hole 22a of the chaplet and the ring-shaped recess 36 is exemplified as a straight slope, but water or hot water around the upper end opening of the through hole is outward, that is, ring-shaped. Since it suffices to flow into the recess 36, the slope is not limited to a linear slope, and may be, for example, a substantially arc slope.

Further, in the embodiment, the entire length of the through hole 22a of the chaplet is exemplified as the minimum diameter that allows the piston 14 to slide and vent. However, since it is sufficient to reliably prevent the inflow of water and hot water along the piston 14, it is not limited to the entire length of the through hole 22a of the chaplet, and, for example, to prevent the retention of water or the like at the upper end opening, Only the predetermined length of the upper end portion may be formed as the minimum diameter that allows the piston 14 to slide and vent.

However, the through hole 22a of the chaplet
Assuming that the total length of the piston 14 is the minimum diameter that allows sliding and ventilation of the piston 14, the chaplet 22, that is, the cylinder 12
It is possible to reliably prevent the rattling of the piston with respect to.

In the embodiment, the dispenser to be attached to a container containing shampoo, rinse, etc. is illustrated, but the contents of the container are not limited to this, and other materials such as hand soap can be used. It goes without saying that the present invention can also be applied to a dispenser mounted on a container containing the liquid as described above.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0048]

As described above, according to the push-type dispenser of the present invention, the recess of the chaplet, which is inevitably generated by the screw formation, is provided as a large-diameter ring-shaped recess, which is isolated from the through hole. Therefore, it is possible to prevent water or hot water from staying in contact with the circumferential surface of the piston.

Since the drain hole is provided on the bottom surface of the ring-shaped recess, water and hot water do not stay in the ring-shaped recess. That is, the retention of water or the like does not hinder the screwing between the male thread of the nozzle head and the female thread of the chaplet, so that the usability of the screw is reliably improved.

Further, since the diameter of the through hole of the chaplet is set to the minimum diameter that can ensure the sliding of the piston and the ventilation on the peripheral surface, water or the like adhering to the peripheral surface of the piston can be pushed into the nozzle head. Under the accompanying sliding of the piston, it is peeled off from the circumferential surface of the piston. Therefore, also from this point, mixing of water and the like into the container is sufficiently prevented.

Furthermore, since the seal piece or the like that is brought into close contact with the peripheral surface of the piston can be omitted from the chaplet, the structure of the chaplet is simplified.

If the upper end opening of the through-hole is set higher than the opening end of the ring-shaped recess and the upper surface between the through-hole and the ring-shaped recess is formed as a slope inclined outward, the vicinity of the upper end opening of the through-hole is increased. Since the water and hot water flows outward along the slope, the retention of water and the like at the position where it contacts the piston is reliably prevented, and the mixing of water and hot water inside the container is more reliably prevented. .

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a push type dispenser according to the present invention in an initial position.

FIG. 2 is a schematic vertical cross-sectional view of the push type dispenser at the pushing position of the nozzle head.

FIG. 3 is a perspective view of the chaplet seen from above and below.

FIG. 4 is a schematic vertical sectional view of a conventional push-type dispenser in an initial position.

[Explanation of symbols]

 10 Push-type dispenser 11 Nozzle head 12 Cylinder 14 Piston 18 Container 20 Return spring 22 Chaplet 22a Through hole 22b Top surface (slope) 32 Male thread 34 Female thread 36 Ring-shaped recess 36a Open end of ring-shaped recess 38 Drain hole 40 Through hole Top opening of

Claims (2)

[Claims] 1. A nozzle for a female screw of a chaplet fixed to the upper end of a cylinder, which can suck and pressurize liquid into a cylinder by a reciprocating motion of a piston by pushing the nozzle head against a return spring to flow out from an outlet of the nozzle head. In a push-type dispenser in which the nozzle head is fixed in its pushed-in position by screwing the male thread of the head, at least the upper end of the through hole of the chaplet through which the piston is inserted is used to prevent sliding of the piston and ventilation of the peripheral surface. Provide a minimum diameter that can be guaranteed, and provide a ring-shaped recess with a diameter larger than the fixed upper end of the cylinder on the upper surface of the chaplet, form an internal thread on the outer peripheral surface inside the ring-shaped recess, and at the bottom of the ring-shaped recess. The push-type device is characterized in that at least one through-drainage hole is formed in the Spencer. 2. A nozzle for a female screw of a chaplet fixed to the upper end of the cylinder by sucking and pressurizing the liquid into the cylinder by the reciprocating motion of the piston by pushing the nozzle head against the return spring and flowing out from the outlet of the nozzle head. In a push-type dispenser in which the nozzle head is fixed in its pushed-in position by screwing the male thread of the head, at least the upper end of the through hole of the chaplet through which the piston is inserted is used to prevent sliding of the piston and ventilation of the peripheral surface. Provide a minimum diameter that can be guaranteed, and provide a ring-shaped recess with a diameter larger than the diameter of the fixed cylinder upper end on the upper surface of the chaplet, and form a female screw on the outer peripheral surface inside the ring-shaped recess to open the upper end of the through hole. It is set higher than the opening end of the ring-shaped recess, and the upper surface between the through hole and the ring-shaped recess is a slope inclined outward. And on the bottom of the ring-shaped recess,
A push-type dispenser having at least a single through-hole draining hole.