JPH0567351U - dispenser - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a dispenser configured to discharge the contents from a discharge port to the outside by pressing a push button, and to reduce the number of parts and prevent the occurrence of dripping. To aim. [Structure] A stem 21 in which a piston 28, which is integrally formed during a downward movement, slides in a liquid-tight manner inside a tank 22, and an opening 33 is opened when the stem 21 is displaced upward, so that the contents flow into the tank 22. Is formed integrally with the piston 28 and the piston 28 having a valve portion that allows the valve to allow the contents to flow from the tank 22 into the stem 21 when the stem 21 moves downward, and the stem 21 moves upward. Valve body 29 that closes the stem 21 and the tank 22 in a liquid-tight manner, and the poppet 25
And a groove 35 formed in a predetermined range upward from the position where the valve element 29 faces when the stem 21 is in the lower limit.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dispenser, and more particularly to a dispenser configured to discharge contents from a discharge port to the outside by pressing a push button.

[0002]

[Prior Art]

 For example, some containers for emulsion, lotion, shampoo, etc. are equipped with a dispenser that discharges the contents by pressing a push button provided on the head. According to the container with the dispenser, it is not necessary to tilt the container to take out the contents, and it is easy to handle, and a fixed amount of the contents can be taken out every time the push button is operated.

FIG. 7 is a sectional view showing the structure of a conventional dispenser 1. In the figure, 2 is a push button integrated with the discharge nozzle 3, 4 is a screw cap, 5 is a stem, 6 is a tank, 7 is a coil spring, 8 and 9 are ball valves functioning as check valves, and 10 is A pipe and 13 are poppets.

The dispenser 1 is attached to the container 11 by screwing a screw cap 4 into the container opening. The stem 5, the tank 6 and the like form a fluid passage inside the dispenser 1 from the pipe 10 to the discharge nozzle 3.

When the push button 2 is pressed against the elastic biasing force of the coil spring 7, the stem 5 is displaced and the piston 12 (the lower end portion of the stem 5 that is in liquid-tight contact with the inner wall of the tank 6) is displaced. Attached to) also moves downward. As a result, the content filled in the fluid passage is pressurized, the piston 12 is separated from the tip of the poppet 13, and the tank 6 and the stem 5 communicate with each other. Further, since the ball valve 8 closes the lower portion of the cylinder 6, the contents are discharged from the discharge nozzle 3.

On the other hand, when the pushing operation of the push button 2 is stopped, the stem 5 is biased by the coil spring 7 and returns to its original position. At this time, since the ball valve 9 closes the upper portion of the stem 5, the outside air does not enter the dispenser 1 from the discharge nozzle 3 and the tank 6 has a negative pressure, so that the container 11 The contents inside pass through the pipe 10 and enter the dispenser 1. As a result, the structure was prepared for the next discharge operation.

[0007]

[Problems to be solved by the device]

 In the dispenser 1 having the above structure, when the ball valve 9 is closed after the operation of taking out the content is completed, the content remains in the discharge flow path 14 extending from the ball valve 9 to the discharge port 3a. In the conventional dispenser 1, the discharge flow path 14 is configured so that the contents simply flow at the time of discharge. Therefore, when the viscosity of the contents is low, the remaining contents leak from the discharge port 3a. There was a problem that so-called dripping occurred.

In addition, in the dispenser 1 having the above-described configuration, each component has a single function for discharging the content, so that the number of parts is increased, and accordingly, the product cost is increased. There were problems such as rise, complicated assembly process, and troublesome parts management. The present invention has been made in view of the above points, and an object of the present invention is to provide a dispenser capable of reducing the number of parts and preventing the occurrence of dripping.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the dispenser according to the present invention, a tank fixed to a container filled with contents, a discharge nozzle arranged at the upper part, and a piston integrally formed at the lower part are integrally formed. The piston is configured to slide liquid-tight in the tank when the push button formed on the discharge nozzle is pressed, and the stem is disposed so that it can be displaced minutely. When the stem is in the locked position and when the stem moves down, the opening formed in the tank is closed, and the stem is opened slightly by a small displacement at the time of upward movement to open the opening and store it in the tank. It is formed integrally with the above-mentioned piston and a poppet that forms a valve that allows the inflow of material, and when the stem moves downward, it allows the content to flow from the tank into the stem. Both are formed on the poppet and a valve element that slides against the outer wall of the poppet to close the stem and the tank in a liquid-tight manner when the stem moves upward, and the valve element opposes when the stem is in the lower limit. From this position, a groove formed upwardly over a predetermined range and a spring member for urging the stem upward are provided.

[0010]

[Action]

 By configuring the dispenser as described above, when the stem moves downward (that is, when the push button is pressed to discharge the contents), the valve element allows the contents to flow from the tank into the system. Therefore, the contents are discharged from the discharge nozzle.

On the other hand, when the stem moves upward, the valve body slides on the outer wall of the poppet to seal the stem and the tank in a liquid-tight manner. However, a groove is formed in the poppet, and this groove is formed in a predetermined range in the upper direction from the position where the valve bodies face each other when the stem is in the lower limit of movement. In the area where the groove is formed, the stem and the tank remain in communication with each other through the groove even when the stem moves upward.

Negative pressure is generated in the tank due to the upward movement of the stem, but this negative pressure is applied to the inside of the stem through the groove in a predetermined range where the valve body faces the groove. To be done. Therefore, the content remaining in the discharge nozzle is sucked into the stem by the suction force of this negative pressure, and it is possible to prevent dripping from the discharge nozzle.

In addition, since the dispenser having the above-described structure has a structure in which the valve body is integrated with the stem and the valve portion is formed in the poppet so that the stem and the poppet have two functions, the number of parts is reduced. Can be planned.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a dispenser 20 according to an embodiment of the present invention. The dispenser 20 is roughly composed of a stem 21, a tank 22, a coil spring 23, a cap 24, a poppet 25, and the like. The dispenser 20 is attached to, for example, a container 27 (shown by a chain line) filled with a liquid content.

The stem 21 is a resin molded product, and a discharge nozzle 26 (having a push button 26a) is arranged on the upper part thereof. The interior of the stem 21 and the discharge nozzle 26 are hollow, forming a discharge flow path 26b through which the contents pass. A piston 28 is integrally formed at the outer peripheral position of the lower end of the stem 21, and the piston 28 is in liquid-tight contact with the inner wall 22 a of the tank 22.

A valve body 29 is integrally formed on the stem 21 at a position opposite to the position where the piston 28 is arranged. The valve element 29 has a shape that extends obliquely inward and is configured to be capable of sliding contact with a poppet 25, which will be described later, in a liquid-tight manner. Unlike the conventional dispenser 1 (see FIG. 7), the dispenser 20 according to the present invention does not have a ball valve disposed on the upper portion of the stem 21, and the stem 21 directly communicates with the discharge passage 26b. Is becoming

As described above, the tank 22 has the piston 28 formed on the stem 21 slidably contacting the inner wall 22 a thereof, and the stem 21 can slide vertically and liquid-tightly in the tank 22. Is becoming A cap 24 is provided at the upper end of the tank 22, and the dispenser 20 is fixed to the container 27 by screwing the cap 24 onto a screw 27a formed in the container opening. A ring 30 having a stopper portion 30a for locking the stem 21 at the upper limit position is fitted to the cap 24. A screw 30b is formed on the inner peripheral portion of the ring 30. The screw 30b is screwed with the screw portion 26d formed on the discharge nozzle 26 when the stem 21 is fixed at the lock position.

On the other hand, a pipe 32 is provided in the opening 33 formed in the lower portion of the tank 22, and the contents filled in the container 27 are stored in the tank 22 through the pipe 32 and the opening 33. Enter. Further, an engaging portion 31 that engages with a protruding piece 36 formed on the poppet 25 described below is formed on the lower portion of the inner wall of the tank 22.

The poppet 25 is a rod-shaped member, and is arranged in the stem 21 and the tank 22 so as to be able to be slightly displaced in the vertical direction. The lower end portion of the poppet 25 is a valve portion 34, and a groove portion 35 is formed at a substantially central position of the outer wall 25a. The groove portion 35 is formed over a predetermined range in the upward direction above the position where the valve body 29 faces when the stem 21 is pressed to the lower limit position. The formation range of the groove 35 will be described in detail later.

A protruding piece 36 that engages with the engaging portion 31 formed on the tank 22 is formed at the lower end of the poppet 25 so as to protrude outward. The poppet 25 is configured to be guided to move in the vertical direction by the engagement of the protruding piece 36 with the engaging portion 31. Further, the protruding piece 36 and the engaging portion 31 are engaged with each other in a loosely fitted state, so that the contents can pass through the engaging portions of both.

Further, the valve portion 34 formed at the lower end portion of the poppet 25 closes the opening portion 33 by contacting the valve seat portion 37 formed near the opening portion 33 of the tank 22. .. The valve portion 34 is configured to contact the valve seat portion 37 and close the opening portion 33 except when the contents in the container 27 are sucked into the tank 22.

The coil spring 23 has its upper end contacting the lower end of the piston 28, and its lower end contacting the upper end of the engaging portion 31 formed in the tank 22. The coil spring 23 elastically biases the stem 21 upward in the drawing.

In the dispenser 20 having the above structure, the piston 21 and the valve body 29 are integrally formed on the stem 21, so that the stem 21 has a function as a valve. Further, by providing the poppet 25 with the valve portion 34, the poppet 25 also has a function as a valve. By providing the stem 21 and the poppet 25 with a plurality of functions in this way, it is possible to reduce the number of parts, thereby reducing the product cost, reducing the assembly man-hour, and facilitating the parts management. ..

Next, the operation of the dispenser 20 having the above configuration will be described. FIG. 1 shows the dispenser 20 in an unused state (hereinafter, referred to as a pre-use state).

In the pre-use state, the coil spring 23 extends and the stem 21 is pushed up by the coil spring 23. However, when the piston 28 comes into contact with the stopper portion 30 a formed on the ring 30, The stem 21 has its upward movement regulated and is stopped at the upper movement limit position.

In this pre-use state, the valve element 29 is in liquid-tight contact with the outer wall 25a of the poppet 25 at a position above the position where the groove portion 35 of the poppet 25 is formed, so that the stem 21 and the tank 22 are liquid-tightly separated. Is made. Thereby, the airtightness of the container 27 is maintained, and the deterioration of the contents filled in the container 27 is prevented.

Next, the operation of the dispenser 20 during operation will be described.

To use the dispenser 20 to take out the contents from the container 27, the push button 26a is pressed downward. Although the stem 21 moves downward by this pressing operation, as described above, the valve body 29 is in sliding contact with the outer peripheral wall 25a of the poppet 25, and the valve portion 34 formed in the poppet 25 is in the tank 22. It abuts the valve seat portion 37 and closes the opening 33. Further, when 21 moves downward, the volume of the space portion formed by the stem 21 and the tank 22 (indicated by an arrow A in the figure, and the space portion is filled with contents) is small. The internal pressure rises.

As described above, the space portion A is sealed by the valve body 29 slidingly contacting the outer peripheral wall 25 a of the poppet 25 at the upper portion thereof, and the valve portion 34 is in contact with the valve seat portion 37 at the lower portion thereof. It is a space sealed by contact. Further, in the dispenser 20 according to the present invention, this sealing force is stronger at the portion where the valve portion 34 is in contact with the valve seat portion 37 than the portion where the valve body 29 is in sliding contact with the outer peripheral wall 25a. It is configured to do. Therefore, when the downward movement of the stem 21 progresses and the internal pressure of the space portion A further rises and the internal pressure of the space portion A becomes larger than the sealing force of the valve body 29, the valve body 29 is displaced and the valve body 29 and A gap is formed between the outer peripheral wall 25a (this state is shown in FIG. 2).

As a result, the contents in the space A enter the stem 21 through the gap formed as described above, and further are discharged to the outside from the discharge port 26c through the projecting flow path 26b. By the series of operations described above, the contents in the container 27 can be discharged from the discharge nozzle 26.

FIG. 3 shows a state in which the stem 21 is pressed down to the lower limit. At the stage where the discharge operation of this content is completed, the content still remains in the discharge flow path 26b (this content is referred to as residual content 38. Part of it is shown in satin in the figure). .. Further, the valve element 29 is in sliding contact with the outer wall 25a at a position lower than the groove portion 35 formed in the poppet 25.

Subsequently, when the pressing operation of the push button 26 a is released from the state shown in FIG. 3, the stem 21 starts to move upward due to the elastic restoring force of the coil spring 23. As a result, the volume of the space A formed in the tank 22 increases, and the inside of the space A becomes negative pressure.

FIG. 4 shows a state in which the stem 21 has moved up slightly. As described above, the groove portion 35 is formed in the poppet 25, and the formation position thereof is a predetermined range portion in the upward direction from the position where the valve body 29 faces when the stem 21 is in the lower limit of movement. Therefore, when the stem 21 moves upward by the formation length of the groove portion 35, the valve body 29 and the groove portion 35 are kept facing each other.

When the valve body 29 faces the groove portion 35, the valve body 29 is separated from the outer peripheral wall 25 a of the poppet 25, and the groove portion 35 serves as a bypass passage so that the stem 21 and the tank 22 are in communication with each other. Becomes In this state, the negative pressure generated in the space A due to the upward movement of the stem 21 is applied to the discharge flow passage 26b via the groove 34 and the stem 21. Therefore, the residual contents 38 remaining in the discharge passage 26b are sucked into the stem 21 by the applied negative pressure, and the residual contents 36 remaining in the discharge passage 26b can be reduced or eliminated. As a result, it is possible to reliably prevent dripping.

Further, when the stem 21 moves upward, the valve body 29 passes through the position where the groove portion 35 is formed and again comes into sliding contact with the outer peripheral wall 25 a of the poppet 25. This state is shown in FIG. When the valve body 29 is brought into sliding contact with the outer peripheral wall 25a of the poppet 25, the stem 21 and the tank 22 are again liquid-tightly defined, and the negative pressure in the space A is stopped from being applied to the stem 21. Further, the negative pressure in the space A is applied only in the tank 22, and the force for raising the stem 21 acts as a force for moving the poppet 25 upward through the valve body 29, so that the poppet 25 is slightly increased. The valve portion 34 moves away from the valve seat portion 37, and the opening portion 33 formed in the lower portion of the tank 21 is opened.

Therefore, the tank 22 and the container 27 communicate with each other through the opening 33 and the pipe 32, and since the inside of the tank 22 has a negative pressure, the contents inside the container 27 are sucked into the tank 22. It Eventually, the stem 21 reaches the upper limit position shown in FIG. 1, and one discharge operation is completed. When the discharge operation is completed, the negative pressure in the tank 22 disappears, so the poppet 25 moves downward to close the opening 33 again.

As is clear from the above description, the length of the groove portion 35 corresponds to the time for sucking the residual content 38 from the discharge flow path 26b. If the length of the groove 35 is long, the residual content 38 is surely sucked from the discharge flow path 26b, but if it is set too long, the content to be discharged next time will not be sufficiently filled in the tank 22. I will end up. On the other hand, if the length of the groove portion 35 is short, the content to be discharged next time is sufficiently filled in the tank 22, but the residual content 38 cannot be sufficiently sucked from the discharge flow path 26b, which may cause dripping. There is. Therefore, the length of the groove 35 is set so that the residual contents 38 can be sucked to the extent that no dripping occurs and the contents to be discharged next time can be sufficiently filled into the tank 22. ..

On the other hand, FIG. 6 shows the dispenser 20 in a locked state. This locked state means that when the container 27 in which the dispenser 20 is installed is shipped as a product, the contents are not discharged and the virgin property is not lost due to the contents coming into contact with the outside air. It refers to a state in which the outside air is blocked and the stem 21 is fixed so as not to be displaced. Specifically, it means a state in which the screw portion 26d formed on the discharge nozzle 26 is screwed into the slew 30b formed on the ring 30.

In this state, the upper end portion of the poppet 25 is pressed downward by the pressing portion 26e formed on the discharge nozzle 26, and therefore the valve portion 34 formed on the poppet 25 is valved by the screwing force. The seat portion 37 is strongly pressed, and the opening portion 33 is firmly closed. Moreover, the movement of the stem 21 is also restricted by screwing the screw portion 26d into the slew 30b. Therefore, in the locked state, the valve portion 34 abuts on the valve seat portion 37, so that the virginity of the contents in the container 27 is secured, and the leakage of the contents due to the displacement of the stem 21 during the unloading is prevented. be able to.

Since the residual content 38 sucked into the stem 21 is discharged in the next discharge operation, there is no problem such as deterioration of the content.

[0042]

[Effect of the device]

 As described above, according to the present invention, it is possible to prevent dripping from the discharge nozzle to prevent deterioration of the contents, and to reduce the number of parts, thereby reducing the product cost, the assembly process, and the parts. It has features such as easy management.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a dispenser (before operation) according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the dispenser in a use state.

FIG. 3 is a cross-sectional view of the dispenser with the stem operated to a lower limit position.

FIG. 4 is a cross-sectional view of the dispenser with the valve body facing the groove.

FIG. 5 is a cross-sectional view of the dispenser in a state where the valve body has moved to the upper part of the groove.

FIG. 6 is a cross-sectional view showing the dispenser in a locked state.

FIG. 7 is a cross-sectional view showing an example of a conventional dispenser.

[Explanation of symbols]

 20 Dispenser 21 Stem 22 Tank 22a Inner wall 23 Coil spring 24 Cap 25 Poppet 25a Outer wall 26 Discharge nozzle 26a Push button 26b Discharge flow path 26c Discharge port 27 Container 28 Piston 29 Valve body 30 Ring 30a Stopper part 31 Engagement part 32 Pipe 33 Opening part 34 Valve part 35 Groove part 36 Projecting piece 37 Valve seat part 38 Residual contents

Claims (1)

[Scope of utility model registration request] 1. A tank fixed to a container filled with contents, a discharge nozzle provided in an upper portion, and a piston integrally formed in a lower portion, which are formed in the discharge nozzle. The piston is configured to slide in a liquid-tight manner in the tank when the push button portion is pressed, and the stem is disposed in the stem so as to be finely displaceable, and the stem is in the lock position. When the stem is moved downward, the opening formed in the tank is closed, and the stem is slightly displaced at a predetermined time so that the opening is opened to open the contents in the tank. A poppet that forms a valve portion that allows the inflow of a substance is formed integrally with the piston, and when the stem moves downward, the content is prevented from flowing from the tank into the stem. Allowed and when the stem moves up A valve element that is in sliding contact with the outer wall of the poppet and liquid-tightly closes the stem and the tank; and a valve element that is formed on the poppet and that faces the valve element when the stem is in the lower limit of movement. A dispenser having a groove portion formed over a predetermined range toward the base and a spring member for urging the stem upward.