JPH04267757A - Push type dispenser - Google Patents

Abstract

PURPOSE:To simplify a cylinder structurally. CONSTITUTION:A cylinder 12 is composed of an upper half part 18 and a lower half part 20, the former including a flange 22 and a ventilating hole 32 and the latter including a valve seat 40 for a primary valve and a seat retaining projection 41. The lower half part 20 and the upper half part 18 are joined together by the means other than threaded engagement to fabricate the cylinder.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention draws up the liquid in the container into the cylinder by sliding a piston that is attached to the mouth of the container and is linked to the movement of the nozzle head between the pressing position and the protruding position. This invention relates to a push type dispenser that pressurizes and causes the flow to flow out from the outlet.

0002

[Prior Art] In general, push type dispensers
When a cylinder is attached to the mouth of a container using a bottle cap and a nozzle head with a piston attached to the bottom end is pressed downward, the piston slides inside the cylinder and the liquid in the container flows into the cylinder. It is configured to suck up, pressurize, and drain.

A suction tube is attached to the lower end of the cylinder, and an inflow passage communicating with the suction tube is formed at the lower end of the cylinder. Further, an outflow path is formed from the piston to the nozzle head to communicate an outflow port provided in the nozzle head with the cylinder. A valve (primary valve) that controls the flow of liquid from the container to the cylinder is placed in the inflow path at the bottom end of the cylinder, and a valve (secondary valve) that controls the flow of pressurized liquid from the cylinder to the outflow port is placed in the outflow path. are provided in each.

A compression spring is disposed within the cylinder and biases the nozzle head outwardly with the piston so that the nozzle head projects into its outward position. Then, when the nozzle head is pushed in against the biasing force of the compression spring, the piston slides inside the piston, and the protruding position of the nozzle head is
The distance corresponding to the distance between pushed positions (pressing positions) is the stroke of the piston.

[0005] The nozzle head is normally movable in the vertical direction (can be raised and lowered), but it may also be movable in the horizontal direction or in the tilting direction.

[0006]

The cylinder, like the nozzle head, piston, bottle cap, and suction tube, is molded from plastic. However, due to the following design constraints, cylinders tend to be structurally more complex than other members. (1) A flange that is pressed and held against the upper surface of the mouth of the container by the bottle cap is integrally molded at the upper end of the cylinder. (2) Ventilation holes (negative pressure prevention holes) are installed to prevent the inside of the container from becoming negative pressure due to the outflow of liquid from inside the container.
is provided on the upper side wall of the cylinder. (3) In order to form an inflow passage and attach a suction tube, the cylinder is formed into a stepped shape with a smaller diameter at the lower end. (4) A compression spring that biases the nozzle head and piston is built into the cylinder, and the cylinder has a stepped shape to ensure a spring seat for the compression spring. (5) In order to secure the valve seat of the primary valve and to limit the play of the primary valve in the lateral direction, the cylinder is also provided with a stepped shape at the position where the primary valve is arranged. (6) Steel balls are often used as the primary valve, and a protrusion is molded into the cylinder inner wall above the valve seat to prevent the steel balls from escaping upwards.

As mentioned above, the cylinder has a stepped shape with 3 to 4 steps, and is molded with a flange at the top end, a ventilation hole at the top of the side wall, and an escape prevention protrusion near the bottom end. The cylinder becomes structurally complex. Therefore, the mold becomes complicated, the manufacturing cost of the mold increases, the molding cycle becomes longer, high productivity cannot be ensured, and the cylinder cannot be produced at low cost. Also, due to the complex structure, it is difficult to obtain a high quality cylinder.

Generally, a push type dispenser is transported and displayed at a store with a cylinder attached to the mouth of a container containing a liquid to be dispensed using a bottle cap. However, since the piston slides in conjunction with the pressure of the nozzle head and causes the liquid to flow out, it is necessary to prevent unnecessary pressure of the nozzle head during transportation and display.

[0009] Therefore, the dispenser, for example,
The nozzle head can be locked in the pressed position by screwing the male thread at the bottom end of the nozzle head into the female thread at the top end of the cylinder, or by engaging the engagement protrusion at the bottom end of the nozzle head with the corresponding engagement protrusion at the top end of the cylinder. It is composed of According to this configuration, by locking the nozzle head in the pressing position, unexpected pressing of the nozzle head due to carelessness or falling is prevented, and sliding of the piston is indirectly prevented, thereby preventing liquid leakage. Ru.

Furthermore, by locking the nozzle head in its pressed position, the dispenser can be made smaller by an amount equivalent to the stroke of the piston, making it possible to pack it into a smaller size, reducing display space, and facilitating efficient transportation and Exhibition is possible.

By the way, the primary and secondary valves are normally pressed against the valve seat by their own weight, but when transported or displayed, containers may fall over or
When tilted, the primary valve and secondary valve separate from the valve seat and are opened. Then, the inside of the container is communicated with the outside air through the opened primary valve and secondary valve, and there is a possibility that the liquid inside the container leaks from the outlet through the primary valve and the secondary valve.

As described above, even if the nozzle head is locked to prevent the piston from sliding, leakage of liquid due to overturning or tilting of the container cannot be prevented. Therefore, a push-type dispenser has a configuration in which a valve holder for the primary valve is provided at the lower end of the piston, and when the nozzle head is locked in the pressed position, the valve holder pushes the primary valve and forcibly presses the primary valve against the valve seat. - is known (for example, JP-A-58-02
No. 0259, JP-A-60-166769). According to this configuration, when the nozzle head is locked in the pressed position, the primary valve is forcibly pressed against the valve seat by the valve holder, so even if the container falls over or tilts, the primary valve will not open, and the inside of the container will not open. Communication with the outside air is cut off, preventing liquid leakage.

However, in a configuration in which the nozzle head is locked and the primary valve is pressed by the valve holder at the same time, it is necessary to reduce molding errors and assembly errors of related components such as the nozzle head, piston, valve holder, and primary valve. Components must be molded to high quality.

[0014] Here, if a slit is provided in the valve holder and the primary valve is pressed under elasticity, molding errors and assembly errors can be absorbed to some extent and the pressing of the primary valve can be ensured. but,
Since the valve holder is formed at the lower end of the piston made of plastic, the elasticity of the valve holder decreases as it is used, and there is a possibility that it will not be able to reliably press the primary valve. Also,
If the molding error and assembly error are relatively large, the elasticity of the valve holder can no longer absorb the molding error and assembly error, and the valve holder cannot press the primary valve.

In addition, in a push-type dispenser configured to lock the nozzle head in a pressed position and press the primary valve with a valve holder, the cylinder has a female thread or an engaging protrusion at the upper end, so the cylinder is structurally It becomes even more complicated. Furthermore, in order to accurately ensure the relative position of the valve seat with respect to the piston, the cylinder must be molded with high quality, making it impossible to obtain an inexpensive cylinder.

The object of the present invention is to provide a push type dispenser with a simplified cylinder structure.

[0017]

[Means for Solving the Problems] In order to achieve this object, according to the present invention, a cylinder has a container opening, an upper half having a flange sandwiched between a bottle cap and opening at the top and bottom, and a suction It is molded to be divided into a lower end to which the tube is attached, and a lower half having a lower end. The upper end of the lower half is open and is formed to be able to fit into the upper half. Also,
An inflow passage with a valve seat is formed in the lower half of the cylinder to guide the liquid in the container from the suction tube to the cylinder.

[0018] The piston extends into the lower cylinder half through the upper end opening of the cylinder lower half and is screwed into the cylinder lower half, so that the piston contacts the valve seat of the valve in the inlet passage of the cylinder lower half. It's pressing.

[0019]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the push type dispenser 10 according to the present invention includes a cylinder 12, a piston 14 slidably provided within the cylinder, and a nozzle head 16 fixed to the upper end of the piston. The cylinder, piston, and nozzle head are all made of plastic.

The cylinder 12 is formed into an upper half 18 with open upper and lower ends, and a lower half 20 with an upper end fitted into the upper half. A flange 22 is formed at the upper end of the cylinder upper half 18, and below the flange, the cylinder 1
An annular stopper 24 is formed on the inside of 2. A compression spring 26 is built into the cylinder 12 and pushes the piston 14 and nozzle head 16 outward together, and the step 28 of the piston comes into contact with the stopper 24 of the cylinder, so that the protruding position of the piston, that is, the nozzle head, is adjusted. stipulated.

The dispenser 10 is detachably attached to the mouth of the container using the bottle cap, with the flange 22 of the cylinder being sandwiched between the mouth of the container 30 and the bottle cap 31. Generally, the dispenser 10 is attached to the mouth of a container by screwing the female thread of the bottle cap 31 onto the male thread of the container mouth 30, but the dispenser may be attached by other methods. .

In order to prevent the inside of the container from becoming negative pressure due to the outflow of liquid from inside the container, a ventilation hole (negative pressure prevention hole) 32 is provided in the upper half of the cylinder 18 below the stopper 24.
For example, three of them are provided on the side wall of the housing, spaced apart by 120° from each other.

The piston 14 is integrally provided below the ventilation hole 32 of the cylinder with a skirt-shaped seal piece 34 that slides into contact with the inner wall of the upper cylinder half 18, and this seal piece is fitted with a compression spring. It also functions as a spring seat. Further, an annular protrusion 35 that comes into sliding contact with the stopper 24 of the cylinder is attached to the piston 14.
The stopper 24 is formed on the outer wall at a middle portion thereof, and the upper part of the stopper 24 extends upward to ensure elastic sliding contact with the projection.

The upper end of the lower cylinder half 20 is open, and the upper end is shaped so that the lower end of the piston 14 can be inserted therethrough. Since the upper end of the lower cylinder half 20 is open,
The lower half of the cylinder is elastically fitted into the upper half of the cylinder 18, allowing for reliable fitting.

The lower half of the cylinder 20 has a stepped shape with a smaller diameter at the lower end, and a suction tube 36 is attached to the lower end of the lower half of the cylinder. Additionally, an inlet passage 38 is formed in the lower cylinder half 20 and a valve seat 40 for the primary valve 42 is formed.
is provided in the inflow channel. In the embodiment, a steel ball is employed as the primary valve 42, and an escape prevention protrusion 41 formed on the inner wall of the lower cylinder half 20 prevents the steel ball (primary valve) from rolling upward.

A thread 15 is formed at the lower end of the piston 14, and a female thread 21 is formed at the lower half portion 20 of the cylinder. The lower end of the piston 14 is formed into a truncated cone shape corresponding to the shape of the inner wall of the lower cylinder half 20, and a slit 44 is provided at the lower end of the piston. Here, when the piston 14 is screwed into the lower cylinder half 20 as shown in FIG.
5,21 are provided.

An outlet 46 is formed in the nozzle head 16, and an outlet passage 48 communicating with the outlet is provided in the piston 14 and the nozzle head 16. Further, a valve seat 50 is provided in the outflow passage 48 within the piston, and a secondary valve 52 is built into the piston 14. The secondary valve 52 is made of a steel ball like the primary valve, and the escape prevention protrusion 51 prevents the secondary valve 52 from rolling.

As shown in FIG. 2, when the nozzle head 16 is pushed in and the piston 14 is screwed onto the lower cylinder half 20, the nozzle head is locked, and the dispenser 10 is transported with the nozzle head locked. It will be exhibited. Therefore, during transportation and display, the nozzle head 1
6 cannot be pressed, and unexpected pressing of the nozzle head due to carelessness or falling is prevented, and liquid leakage is reliably prevented.

Of course, since the nozzle head 16 is pushed in, the dispenser 10 is miniaturized and can be packed into a small size, and requires less display space, allowing for efficient transportation and display.

In conventional configurations, the nozzle head is locked by threading or engaging the cylinder or bottle cap. This configuration places the locking mechanism externally and does not provide an aesthetic appearance. On the other hand, in the structure of the present invention in which the male thread 15 at the lower end of the piston is screwed into the female thread 21 of the lower cylinder half 20 inside the cylinder 12 to lock the nozzle head 16, the locking mechanism 43 is located outside. A beautiful appearance can be obtained without any problems.

By screwing the piston 14 and the cylinder lower half 20 together, the lower end of the piston forcibly presses the primary valve 42 against the valve seat 40 to close the primary valve. Therefore, the suction tube 36, the inflow passage 38, the primary valve 42, the cylinder 12
, the secondary valve 52, the outflow path 48, and the outflow port 46, the communication between the inside of the container and the outside air is cut off by the primary valve, and leakage of liquid is prevented.

As can be seen from FIG. 2, when the nozzle head 16 is locked by screwing the piston 14 and the cylinder lower half 20, the annular projection 35 of the piston slides against the upper part of the cylinder stopper. Therefore, even if the liquid in the container flows into the cylinder 12 through the ventilation hole 32, the annular protrusion 3
5, the liquid will not leak out.

In this invention, the cylinder 12 has an upper half 18,
The cylinder is assembled by dividing the cylinder into a lower half 20 and fitting the lower half into the upper half. In this configuration, the cylinder lower half 20
can be used as the compression spring 26 spring seat, and the stepped portion for the spring seat can be omitted.

In the known configuration, the flange, the ventilation hole, the valve seat of the primary valve, and the escape prevention protrusion are formed in an integrated cylinder, so the cylinder has a stepped shape with 3 to 4 stages, and the configuration of the cylinder is complication is unavoidable.

In contrast, in the present invention, in addition to omitting the stepped portion for the spring seat, the flange 22 and the ventilation hole 32 are provided in the upper half of the cylinder 18, the valve seat 40 of the primary valve, and the projection 41 for preventing escape. is provided in the lower half of the cylinder 20, and flanges and the like are distributed and arranged in the upper and lower halves of the cylinder. Therefore, as shown in FIG. 2, the cylinder upper half 18 has a simple structure without a step, and the mold is structurally simple. Compared to the case where a one-piece cylinder is molded from one mold, as in the present invention, the cylinder is molded in the upper half part 18,
By dividing the cylinder into the lower half 20, not only the upper half of the cylinder but also the lower half of the cylinder can be structurally simplified. Therefore, even considering the disadvantage of individually molding and assembling the upper half 18 and lower half 20 of the cylinder using two molds, overall mold costs are reduced and high productivity is ensured. The cylinder 12 can be produced at low cost.

Furthermore, since the cylinder 12 is assembled by fitting the upper half 18 and the lower half 20 of the cylinder without screwing, the assembly of the cylinder can be automated, and from this point of view as well, high productivity can be achieved. It will be done.

The upper half 18 of the cylinder 12 has a simple structure;
Since the lower half portion 20 is molded separately, molding errors are sufficiently reduced compared to molding an integral cylinder. Further, since the cylinder 12 is assembled by fitting the upper half 18 and the lower half 20 of the cylinder, large assembly errors will not occur. Therefore, a high quality cylinder 12 can be obtained.

Furthermore, the valve seat 40 of the primary valve relative to the piston 14 can be formed with high positional accuracy, and the piston can reliably press the primary valve 42 against the valve seat 40 when the nozzle head 16 is locked. In the embodiment, a slit 44 is formed at the lower end of the piston to provide elasticity at the lower end of the piston, so that molding errors and assembly errors can be absorbed to some extent by the elasticity of the lower end of the piston, and the piston 14 connects the primary valve 42 to the valve seat 40. can be reliably pressed.

When the piston 14 and the lower cylinder half 20 are unscrewed, the nozzle head 16 is unlocked, and the nozzle head 16 is pushed outward together with the piston 14 by the biasing force of the compression spring 26. The nozzle head 16 moves to the protruding position where the stepped portion 28 abuts the stopper 24 of the cylinder.

Note that the nozzle head 16 is pushed in between the pressing position, where the male thread 15 at the lower end of the piston does not contact the female thread 21 in the lower half of the cylinder, and the protruding position, and the piston 14
When the liquid in the container is slid in the cylinder 12, the liquid in the container flows into the cylinder 12 through the suction tube 36, the inflow path 38, and the primary valve 42, and is pressurized. Needless to say, the water flows out from the outlet 46 after passing through.

In the embodiment shown in FIGS. 1 and 2, the nozzle head 16 is formed in the shape of a beak, but nozzle heads of various other shapes can be used. Further, a spinner (a swirling member) may be provided at the outlet 46 of the nozzle head.

A push type dispenser 110 according to another embodiment shown in FIG. 3 has the following features except that the nozzle head 16 is cylindrical, a spinner 54 is provided at the outlet of the nozzle head, and a nozzle 55 is provided in front of the spinner. , has a similar configuration to the above-mentioned dispenser 110. spinner 5
4. The nozzle 55 is a known one, and the pressurized liquid flowing through the outlet passage 48 is turned into a vortex when it flows from the axial passage 56 to the tangential passage 57 of the spinner, and is sprayed from the orifice 58 of the nozzle. It flows out as a stream.

[0044] The above-mentioned embodiments are for illustrating the present invention, and do not limit the present invention in any way, and the present invention includes all modifications and modifications within the technical scope of the present invention. Needless to say, it can be done.

[0045]

[Effects of the Invention] As described above, in this invention, the cylinder is molded by being divided into an upper half and a lower half, so the upper half of the cylinder has a simple structure without a stepped part, and the mold is easy to use. Compositionally simplified. The lower half of the cylinder is also structurally simplified. Therefore, two molds were used to form the upper half of the cylinder,
Even considering the disadvantages of individually molding and assembling the lower half, overall, the cost of molding is reduced, high productivity is ensured, and the cylinder can be produced at low cost.

[0046] Since the cylinder is assembled by fitting the upper and lower halves of the cylinder without using screws, the assembly of the cylinder can be automated, and from this point of view as well, high productivity can be obtained.

[0047] Since the cylinder is molded by being divided into an upper half and a lower half, each having a simple structure, molding errors are sufficiently reduced compared to molding a one-piece cylinder. Further, since the cylinder is assembled by fitting the upper and lower halves of the cylinder, large assembly errors will not occur. Therefore, a high quality cylinder can be obtained.

Furthermore, the valve seat of the primary valve relative to the piston can be formed with high positional accuracy, and when the nozzle head is locked, the piston can reliably press the primary valve against the valve seat.

Since the cylinder is also divided into the upper and lower halves, the female thread can be molded into the lower half of the cylinder without any difficulty in molding, and the piston can be screwed into the lower half of the cylinder. . When the piston is screwed into the lower half of the cylinder, a configuration can be easily obtained in which the lower end of the piston forcibly presses the primary valve against the valve seat to close the primary valve. Therefore, communication between the inside of the container and the outside air is blocked by the primary valve, and leakage of liquid is reliably prevented.

[0050] Since the piston is screwed into the lower half of the cylinder inside the cylinder to lock the nozzle head, the locking mechanism of the nozzle head is not located on the outside, resulting in an aesthetic appearance.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a push-type dispenser according to an embodiment of the present invention, with a nozzle head in a protruding position.

FIG. 2 is a longitudinal sectional view of the push type dispenser with the nozzle head locked.

FIG. 3 is a longitudinal cross-sectional view of a push-type dispenser according to another embodiment of the invention, with the nozzle head in the protruding position.

[Explanation of symbols]

10 Push type dispenser 12 Cylinder 14 Piston 15 Male thread at the lower end of the piston 16 Nozzle head 18 Upper half of the cylinder (upper half of the cylinder) 20
Lower half of cylinder (lower cylinder half) 22 Flange 24 Stopper 26 Compression spring 30 Container 31 Bottle cap 32 Ventilation hole 36 Suction tube 38 Inflow passage 40 Valve seat 41 Escape prevention protrusion 42 Primary valve 43 Lock mechanism 46 Flow Outlet 48 Outflow path 50 Valve seat 51 Escaping prevention protrusion 52 Secondary valve 110 Push type dispenser 54 Spinner 55 Nozzle

Claims (2)

[Claims] Claim 1: A cylinder to which a suction tube is attached at the lower end is attached to the mouth of the container using a bottle cap, and a piston provided at the lower end of the nozzle head moves the nozzle head between the pressing position and the protruding position. In conjunction with the movement of
By sliding in the cylinder, the liquid in the container is sucked up into the cylinder through the suction tube and pressurized, and the liquid is pushed out from the outlet of the nozzle head through the piston and the outlet path of the nozzle head. In a type dispenser, the cylinder has a flange that is held between the container mouth and the bottle cap, and is open at the top and bottom, and has an upper half with a piston extending through the upper end opening; an open upper end that can be fitted into the upper half; and a lower end to which the suction tube is attached, and a lower half portion formed with an inflow passage with a valve seat that guides the liquid in the container from the suction tube to the cylinder. Features a push type dispenser. 2. A cylinder to which a suction tube is attached to the lower end is attached to the mouth of the container using a bottle cap, and a piston provided at the lower end of the nozzle head moves the nozzle head between the pressing position and the protruding position. In conjunction with the movement of
By sliding in the cylinder, the liquid in the container is sucked up into the cylinder through the suction tube and pressurized, and the liquid is pushed out from the outlet of the nozzle head through the piston and the outlet path of the nozzle head. In a type dispenser, the cylinder has a flange that is held between the container mouth and the bottle cap, and is open at the top and bottom, and has an upper half with a piston extending through the upper end opening; an open upper end that can be fitted into the upper half; and a lower end to which the suction tube is attached, and a lower half part formed with an inflow passage with a valve seat that guides the liquid in the container from the suction tube to the cylinder. The piston is characterized by extending into the lower half of the cylinder through the upper end opening of the lower half and being screwed into the lower half of the cylinder, thereby causing the piston to press the valve in the inflow path of the lower half of the cylinder against the valve seat. Push type dispenser.