阅读说明：本技术 扳机式泵分配器 (Trigger type pump dispenser ) 是由 赤筑充昭 于 2019-09-05 设计创作，主要内容包括：本发明提供一种能够防止在容器中的液体被抽吸入气缸的最后阶段发生液体从喷嘴飞溅的现象的扳机式泵分配器。一种扳机式泵分配器(A),其具备手柄结构体(1)、安装在该手柄结构体(1)上的喷嘴基座结构体(2)、安装在该手柄结构体(1)上的扳机(3)、安装在该手柄结构体(1)上的气缸结构体(4)、用于将该气缸结构体(4)按压安装在容器的口部上的盖(5)、在气缸结构体(4)内滑动的活塞结构体(6)、形成在活塞结构体(6)上的倒研钵状的唇部(61)、弹推该活塞结构体(6)的弹簧(7)、安装在喷嘴基座结构体(2)上的阀体(8)、形成在该阀体(8)上的研钵状的阀座(81)、安装在气缸结构体(4)的底部并在顶端具有鼓出部(91)的放液阀(9)、一次阀(FV)以及二次阀(SV),通过活塞结构体(6)从上止点移动到下止点,由此将气缸结构体(4)中的液体从喷嘴口(N)排出,放液阀(9)的顶端的鼓出部(91)以穿过倒研钵状的唇部(61)的状态配设,阀体(8)的研钵状的阀座(81)的通孔直径(D1)小于喷嘴口直径(D2)。(The present invention provides a trigger type pump dispenser capable of preventing a phenomenon that liquid splashes from a nozzle at the final stage when liquid in a container is sucked into an air cylinder. A trigger pump dispenser (A) is provided with a handle structure (1), a nozzle base structure (2) attached to the handle structure (1), a trigger (3) attached to the handle structure (1), a cylinder structure (4) attached to the handle structure (1), a cap (5) for pressing and attaching the cylinder structure (4) to a mouth of a container, a piston structure (6) sliding in the cylinder structure (4), a mortar-shaped lip (61) formed on the piston structure (6), a spring (7) for urging the piston structure (6), a valve body (8) attached to the nozzle base structure (2), a mortar-shaped valve seat (81) formed on the valve body (8), a bleed valve (9) attached to the bottom of the cylinder structure (4) and having a bulging portion (91) at the tip end, and a bleed valve seat (9), The primary valve (FV) and the Secondary Valve (SV) are moved from the top dead center to the bottom dead center by a piston structure (6) to discharge the liquid in the cylinder structure (4) from the nozzle opening (N), a bulge (91) at the tip of the bleeder valve (9) is disposed in a state of passing through the inverted mortar-shaped lip (61), and the diameter (D1) of the through hole of the mortar-shaped valve seat (81) of the valve body (8) is smaller than the nozzle opening diameter (D2).)

1. A trigger pump dispenser comprising a handle structure, a nozzle base structure attached to the handle structure, a trigger attached to the handle structure, a cylinder structure attached to the handle structure, a cap for pressing and attaching the cylinder structure to a mouth of a container, a piston structure sliding in the cylinder structure, an inverted mortar-shaped lip formed on the piston structure, a spring for urging the piston structure, a valve body attached to the nozzle base structure, a mortar-shaped valve seat formed on the valve body, a tapping valve attached to a bottom of the cylinder structure and having a bulge at a tip end, a primary valve, and a secondary valve, wherein liquid in the cylinder structure is discharged from a nozzle opening by moving from a top dead center to a bottom dead center through the piston structure,

the trigger pump dispenser is characterized in that,

the bulge portion of the tip end of the tapping valve is disposed in a state of passing through the inverted mortar-shaped rib, and the diameter of the through hole of the mortar-shaped valve seat of the valve body is smaller than the diameter of the nozzle opening.

2. The trigger pump dispenser of claim 1,

the trigger pump dispenser is configured such that the inverted mortar-shaped lip portion is pressed against the bulge portion at the tip end of the tapping valve immediately before the piston structure reaches the top dead center.

3. The trigger pump dispenser of claim 1,

the diameter D1 of the through hole is less than the diameter D2 of the nozzle opening, D1 is 2 mm-6 mm, and D2 is 3 mm-8 mm.

4. The trigger pump dispenser of claim 1,

a water guide pipe is attached below the small-diameter cylinder portion of the cylinder structure, and an attachment is attached to the lower end of the water guide pipe by press fitting.

5. The trigger pump dispenser of claim 4,

the attachment is a cylindrical body, and a thick-walled bottom wall having a bottom hole is provided in the interior of the attachment, and the lower end of the thick-walled bottom wall is an inclined surface.

Technical Field

The present invention relates to a trigger type pump dispenser capable of preventing a liquid splashing phenomenon from occurring, and more particularly, to a trigger type pump dispenser capable of preventing a liquid splashing phenomenon from occurring from a nozzle at a final stage when a liquid is sucked by operating a trigger.

Background

Conventionally, trigger pump dispensers have been widely used as devices for discharging or spraying internal liquid attached to containers.

The trigger pump dispenser typically has a piston and a cylinder, and the liquid is ejected from the nozzle by moving the piston to apply pressure to the cylinder.

The trigger pump dispenser is classified according to the movement mode of the piston, and for example, there is a trigger pump dispenser of a type in which a handle is held by 4 fingers, a trigger is pulled down by a thumb, and a liquid is discharged from a nozzle (see patent document 1).

In the trigger pump dispenser disclosed in patent document 1, a piston is depressed in conjunction with the operation of a trigger to apply pressure to the liquid in a cylinder, thereby discharging the liquid from a nozzle portion to the outside.

However, in the trigger pump dispenser, when the piston is lifted to suck the liquid in the container, the liquid is splashed just before the piston reaches the top dead center.

The reason for this is that immediately before the piston reaches the top dead center, the lip formed on the piston moves in a state of being pressed against the tip end of the liquid discharge valve attached to the cylinder, and the liquid filled between the valve body and the piston is subjected to pressure and suddenly flies out from the nozzle instantaneously.

If the liquid is accidentally spilled, it may contaminate the surrounding environment, and therefore, it is necessary to avoid the liquid splashing phenomenon as much as possible.

Documents of the prior art

Patent documents:

patent document 1: japanese patent laid-open No. 2016-64835

Disclosure of Invention

Problems to be solved by the invention

The present invention has been completed based on such background art.

That is, an object of the present invention is to provide a trigger type pump dispenser capable of preventing a phenomenon in which liquid splashes from a nozzle at a final stage in which liquid in a container is drawn into a cylinder.

Means for solving the problems

The present inventors have conducted extensive studies to solve the above problems, and as a result, have found that the liquid splash phenomenon, which is a conventional problem, can be solved by setting the relationship between the nozzle opening diameter of the nozzle portion and the through hole diameter of the valve seat of the valve body to satisfy a certain condition, and have completed the present invention based on this finding.

The trigger pump dispenser a according to claim 1 includes a handle structure 1, a nozzle base structure 2 attached to the handle structure 1, a trigger 3 attached to the handle structure 1, a cylinder structure 4 attached to the handle structure 1, a cap 5 for pressing and attaching the cylinder structure 4 to a mouth of a container, a piston structure 6 sliding in the cylinder structure 4, an inverted mortar-shaped lip 61 formed on the piston structure 6, a spring 7 for urging the piston structure 6, a valve body 8 attached to the nozzle base structure 2, a mortar-shaped valve seat 81 formed on the valve body 8, a liquid discharge valve 9 having a bulging portion 91 at a tip end thereof and attached to a bottom of the cylinder structure 4, a primary valve FV, and a secondary valve SV, and moves from a top dead center to a bottom dead center by the piston structure 6 to discharge a liquid in the cylinder structure 4 from a nozzle port N, the bulge 91 at the tip of the tapping valve 9 is disposed in a state of passing through the inverted mortar-shaped lip 61, and the through hole diameter D1 of the mortar-shaped valve seat 81 of the valve body 8 is smaller than the nozzle opening diameter D2.

The trigger pump dispenser a according to claim 2 is configured such that the inverted mortar-shaped lip 61 is brought into pressure contact with the bulge portion 91 at the tip end of the tapping valve 9 immediately before the piston structure 6 reaches the top dead center in addition to the trigger pump dispenser a according to claim 1.

Technical scheme 3 the trigger type pump dispenser A on the basis of technical scheme 1 the trigger type pump dispenser A, through-hole diameter D1 < nozzle opening diameter D2, D1 is 2mm ~ 6mm, D2 is 3mm ~ 8 mm.

The trigger pump dispenser a according to claim 4 is the trigger pump dispenser a according to claim 1, wherein a water guide pipe 10 is attached to a lower portion of a small-diameter cylinder portion 4B of the cylinder structure 4, and an attachment 12 is press-fitted to a lower end of the water guide pipe 10.

The trigger pump dispenser a according to claim 5 is the trigger pump dispenser a according to claim 4, wherein the attachment 12 is a cylindrical body, a thick-walled bottom wall 12B having a bottom hole 12A is provided inside the attachment, and a lower end of the thick-walled bottom wall 12B is an inclined surface.

It should be noted that the configurations of the respective inventions described above may be combined as appropriate so long as the object of the present invention is satisfied.

Effects of the invention

The trigger pump dispenser according to the present invention has the following effects.

The invention provides a trigger pump dispenser A, which comprises a handle structure 1, a nozzle base structure 2 mounted on the handle structure 1, a trigger 3 mounted on the handle structure 1, a cylinder structure 4 mounted on the handle structure 1, a cap 5 for pressing and mounting the cylinder structure 4 on the mouth of a container, a piston structure 6 sliding in the cylinder structure, an inverted mortar-shaped lip 61 formed on the piston structure 6, a spring 7 for springing the piston structure 6, a valve body 8 mounted on the nozzle base structure 2, a mortar-shaped valve seat 81 formed on the valve body 8, a liquid discharge valve 9 mounted on the bottom of the cylinder structure 4 and having a bulge 91 at the top end, a primary valve FV and a secondary valve SV, wherein the piston structure 6 moves from the top dead center to the bottom dead center to discharge the liquid in the cylinder structure 4 from a nozzle port N, the bulge 91 at the tip of the tapping valve 9 is disposed in a state of passing through the inverted mortar-shaped lip 61, and the through hole diameter D1 of the mortar-shaped valve seat 81 of the valve body 8 is smaller than the nozzle opening diameter D2. Thus, the liquid does not splash from the nozzle opening N.

The present invention is configured such that immediately before the piston assembly 6 reaches the top dead center, the inverted mortar-shaped lip 61 is pressed against the bulging portion 91 at the tip end of the bleeder 9, and therefore, even when the trigger is not used in a state where it is positioned at the top dead center, liquid leakage due to vibration or the like can be prevented.

The invention has the advantages that the diameter D1 of the through hole is less than the diameter D2 of the nozzle opening, the diameter D1 is 2-6 mm, and the diameter D2 is 3-8 mm, so the design freedom degree of the liquid splash prevention device can be realized.

In the present invention, the water guide pipe 10 is attached to the lower end of the small-diameter cylinder portion 4B of the cylinder structure 4, and the attachment 12 is press-fitted to the lower end of the water guide pipe 10, so that even when the trigger pump dispenser a is detached from a container for replenishing liquid or the like, the liquid does not drip from the water guide pipe due to the backflow of the liquid, and the contamination of the surrounding environment can be avoided.

In addition, the assembly is simple.

In the present invention, since the attachment 12 is a cylindrical body, the thick bottom wall 12B having the bottom hole 12A is provided in the interior thereof, and the lower end of the thick bottom wall 12B is an inclined surface, the liquid can be efficiently absorbed even if the introduction pipe is bent in the middle.

Drawings

Fig. 1 shows a state in which a trigger pump dispenser a of an embodiment of the present invention is mounted on a container.

Fig. 2 is a longitudinal sectional view showing the top dead center position of the trigger pump dispenser a of the present invention.

Fig. 3 is a longitudinal sectional view showing the bottom dead center position of the trigger pump dispenser a of the present invention.

Fig. 4 is a longitudinal sectional view showing the position of the neutral position of the trigger pump dispenser a of the present invention.

Fig. 5 is a diagram showing a final stage of a suction state of the trigger pump dispenser a according to the embodiment of the present invention, in which fig. 5 (a) shows an initial stage of a pressure bonding stage, and fig. 5 (B) shows a final stage of the pressure bonding stage.

Detailed Description

Hereinafter, a trigger pump dispenser a according to an embodiment of the present invention will be described with reference to the drawings.

The trigger pump dispenser a of the embodiment of the present invention is structured as follows: by holding the handle portion 1A in the inverted L shape and pressing down the thumb contact portion 32 of the trigger 3 with the thumb, the piston structure 6 is lowered, and a compressive force is applied to the liquid, whereby the liquid is ejected from the nozzle portion 2A.

Fig. 1 shows a state in which a trigger pump dispenser a of an embodiment of the present invention is mounted on a container.

Note that this is a state in which the attachment 12 is attached to the water guide pipe 10.

As shown in FIG. 1, the trigger pump dispenser A of the present invention is typically used in a container-mounted condition.

Fig. 2 is a longitudinal sectional view showing a top dead center position of the trigger pump dispenser a of the present invention, and fig. 3 is a longitudinal sectional view showing a bottom dead center position of the trigger pump dispenser a of the present invention.

As is apparent from the drawings, the trigger pump dispenser a of the present invention includes a handle structure 1, a nozzle base structure 2 attached to the handle structure 1, a trigger 3 attached to the handle structure, a cylinder structure 4 attached to the handle structure, a cap 5 for pressing and attaching the cylinder structure 4 to a mouth portion of a container, a piston structure 6 sliding in the cylinder structure 4, an inverted mortar-shaped lip 61 formed on the piston structure 6, a spring 7 for urging the piston structure 6, a valve body 8 attached to the nozzle base structure 2, a mortar-shaped valve seat 81 formed on the valve body 8, and a bleeder valve 9 attached to a bottom portion of the cylinder structure 4 and having a bulging portion 91 at a tip end thereof.

Further, a water conduit 10 is attached to a lower portion of the cylinder structure 4, a primary valve FV is provided between the water conduit 10 and the cylinder structure 4, and a secondary valve SV is provided between the cylinder structure 4 and the nozzle mount 2.

By operating the trigger 3, the piston structure 6 is moved from the top dead center to the bottom dead center, and the liquid in the cylinder structure 4 is discharged from the nozzle opening N.

Hereinafter, the structure of the trigger pump dispenser a having such a structure will be described in more detail.

First, the handle structure 1 is composed of a handle portion 1A, which is a portion to be actually gripped by fingers, and a base portion 1B, which is a portion to which the nozzle base structure 2 and the cylinder structure 4 are fitted.

The nozzle base structure 2 is attached to the upper side of the base 1B by press-fitting, and the cylinder structure 4 is attached to the lower side of the base 1B by press-fitting.

The nozzle base structure 2 includes a cylindrical base portion 2B and a nozzle portion 2A extending forward from the cylindrical base portion 2B.

A secondary valve spool 11 that functions as a secondary valve SV described later is disposed in the cylindrical base portion 2B.

The cylinder structure 4 includes a large-diameter cylinder portion 4A, which is a portion where the piston structure 6 slides, and a small-diameter cylinder portion 4B extending downward from the large-diameter cylinder portion 4A.

Further, a projecting rib is formed around the cylinder structure 4, and the projecting rib is pressed against the mouth portion of the container V by the screw cap 5, whereby the cylinder structure 4 is attached to the mouth portion of the container.

In this way, the trigger pump dispenser A is easily mounted on the container V by means of the cap 5.

Further, in the cylinder structure 4 (specifically, the large diameter cylinder portion 4A of the cylinder structure 4), the piston structure 6 (specifically, the large diameter piston portion 6A of the piston structure 6) is disposed slidably.

The piston structure 6 includes a large-diameter piston portion 6A, a small-diameter piston portion 6B, and an inverted mortar-shaped lip portion 61 (in other words, a truncated cone-shaped lip portion 61) protruding from an inner root portion of the small-diameter piston portion 6B.

A piston shaft 6C is attached to the small-diameter piston portion 6B.

The piston structure 6 is constantly urged upward in the figure by the spring 7, and when the trigger 3 is depressed downward and the trigger 3 is rotated, the piston structure 6 moves downward against the urging force of the spring 7.

A cylindrical protrusion 62 is provided at the upper end of the piston structure 6, and the cylindrical protrusion 62 abuts against the pressing recess 31 which is a part of the trigger.

When the trigger 3 is pushed down and the trigger 3 is pivoted about the pivot portion (the trigger 3 is pivoted to the handle structure 1), the cylindrical projection 62 is pushed down by the pressing recess 31 provided at the intermediate position of the trigger, and therefore the piston structure 6 is also lowered in the same manner according to the principle of leverage.

On the other hand, the valve element 8 is inserted and mounted into the nozzle base structure 2 by press fitting.

The valve element 8 is formed in a cylindrical shape, and a mortar-shaped valve seat 81 having a through hole E (in other words, an inverted truncated cone-shaped valve seat 81) is formed at an intermediate position inside the valve element.

The size of the through hole E (specifically, the through hole diameter D1) is set smaller than the nozzle opening diameter D2 of the nozzle portion 2A, which will be described in detail later.

A small-diameter piston portion 6B, which is a part of the piston structure 6, is inserted below the valve body 8.

Specifically, the tip of the small-diameter piston portion 6B of the piston structure 6 is slidable on the inner peripheral wall of the valve body 8.

That is, when the trigger 3 is operated to move in the vertical direction, the small-diameter piston portion 6B slides in the vertical direction in the valve body.

Here, the space enclosed by the valve body 8 and the small-diameter piston portion 6B communicates with the internal spaces of the large-diameter cylinder portion 4A and the small-diameter cylinder portion 4B below the cylinder structure 4, and the internal spaces further communicate with the water conduit 10 and the container interior.

The space enclosed by the valve body 8 and the small-diameter piston portion 6B also communicates with the internal space of the nozzle base structure 2.

A vertically movable secondary valve element 11 is disposed above the mortar-shaped valve seat 81 in the valve body, and the secondary valve element 11 can be brought into contact with or separated from the mortar-shaped valve seat 81 of the valve body 8.

In a state where the secondary-valve body 11 is separated from the mortar-shaped valve seat 81, the space surrounded by the valve body 8 and the small-diameter piston portion 6B also communicates with the internal space of the nozzle base structure 2.

The secondary valve is composed of the secondary valve spool 11 and a mortar-shaped valve seat 81.

On the other hand, a vertically long drain valve 9 extending in the vertical direction is attached to the cylinder structure 4 (specifically, the small diameter cylinder portion 4B of the cylinder structure 4), and the tip of the drain valve 9 is enlarged to form a bulging portion 91.

The tip extends upward through an inverted mortar-shaped lip 61 formed in the small-diameter piston portion (see fig. 3).

Immediately before the piston structure 6 reaches the top dead center, the reverse mortar-shaped lip 61 is set to be pressed against the bulge 91 at the tip end of the bleeder 9 (see fig. 2).

In addition, the relationship between the bulge portion 91 and the reverse mortar-shaped lip portion 61 will be described later. The lower portion of the tapping valve 9 is attached to the small-diameter cylinder portion 4B of the cylinder block 4, but can be moved up and down a certain distance by the regulating frame 92.

Here, a lower hole 4B1 is formed in the bottom of the small-diameter cylinder portion 4B, and a lower valve seat 4B2 is formed around the hole.

The lower hole 4B1 can be closed by bringing the bottom 9A of the tapping valve 9 into contact with the valve seat 4B2, and the lower hole 4B1 can be opened by separating the bottom 9A of the tapping valve 9 from the lower valve seat 4B 2.

Therefore, the bottom of the tapping valve 9 and the lower valve seat 4B2 of the small-diameter cylinder portion 4B constitute a primary valve.

(characteristic points)

The trigger pump dispenser a of the present invention has the above structure, and the characteristic points of the present invention will be described in more detail herein.

Now, when the piston structural body 6 is depressed by operating the trigger 3 to apply pressure to the liquid in the cylinder structural body, the pressurized liquid is discharged from the nozzle opening N.

However, the liquid is subjected to a large resistance when passing through the through hole E (through hole diameter D1) of the mortar-shaped valve seat 81.

Also, the smaller the through hole diameter D1, the greater the resistance.

For reference, in view of the burden on the hand for pulling the trigger 3, in order to reduce the burden, the through hole diameter D1 is preferably as large as possible.

Therefore, conventionally, the through hole diameter D1, specifically, the diameter D2 is increased as much as possible.

However, if the through hole diameter D1 is increased, the burden on the hand is certainly reduced, but the liquid splashing phenomenon as described above occurs in the nozzle opening N immediately before the piston reaches the top dead center.

In the present invention, the diameter D1 of the through hole of the mortar-shaped valve seat 81 is made smaller than the nozzle opening diameter D2, contrary to the conventional art, from the viewpoint of avoiding the occurrence of the liquid splash phenomenon without reducing the burden on the hand when operating the trigger 3.

Namely, the through hole diameter D1 < the nozzle opening diameter D2.

Thus, if the channel diameter D1 is less than the nozzle opening diameter D2, the velocity of the liquid through the nozzle opening is less than the velocity of the liquid through the through-hole E.

In addition, a large resistance is applied to the liquid to be passed through the through-hole E.

This resistance will therefore exert a brake on the speed of the liquid passing through the through hole E.

As a result, the liquid speed from the nozzle opening N is also braked, so that the liquid does not fly out violently, and the so-called splash phenomenon is prevented.

Here, from the viewpoint of the liquid passage resistance and the prevention of the liquid splash phenomenon, the relationship between the through hole diameter D1 and the nozzle opening diameter D2 is preferably: d1 is 2-6 mm, D2 is 3-8 mm.

Since the liquid can be set within this range, the degree of freedom in design for preventing the occurrence of the liquid splash phenomenon is large.

Next, the operation of the trigger pump dispenser a of the present invention will be described.

First, assuming that the trigger is positioned at the top dead center and the piston structure 6 is also positioned at the top dead center, the cylinder structure is filled with liquid (see fig. 2).

Now, when the handle structure 1 is held by a hand and the trigger 3 is pressed by a thumb or the like, the piston structure 6 is lowered and pressure is applied to the liquid in the cylinder structure 4.

In this case, since the primary valve FV is closed and the secondary valve SV is opened, the liquid is discharged from the nozzle opening N to the outside through the nozzle base structure 2.

When a certain amount of liquid is discharged to the outside, the trigger reaches the bottom dead center, and the piston structure 6 also reaches the bottom dead center (see fig. 3).

Next, the hand is removed from the trigger and the trigger is released.

Then, the piston assembly 6 moves upward by the restoring force of the spring 7, and a negative pressure is generated in the cylinder assembly 4, so that the primary valve FV opens, the secondary valve SV closes, and the liquid in the container V is sucked into the cylinder assembly 4 through the water conduit 10 (see fig. 4).

Specifically, the secondary valve spool 11 descends a predetermined distance from the lifted and opened state to reach the mortar-shaped valve seat 81, and comes into contact therewith, and as a result, the secondary valve SV is closed.

Then, the bottom portion 9A of the tapping valve 9 is separated from the valve seat 4B2 of the cylinder block 4, the primary valve FV is opened, and liquid is sucked.

Then, when the liquid is sucked from the container V into the cylinder structure 4 and the piston structure 6 reaches the final stage near the top dead center, the inverted mortar-shaped lip 61 is pressed against the expanded tip bulging portion 91 of the tapping valve 9, and the upper and lower spaces are sealed with the inverted mortar-shaped lip 61 as a boundary.

This final stage is shown in fig. 5.

Fig. 5 is a diagram showing a final stage of a suction state of the trigger pump dispenser a according to the embodiment of the present invention, in which fig. 5 (a) shows an initial stage of a pressure bonding stage, and fig. 5 (B) shows a final stage of the pressure bonding stage.

However, even if the valve body is in the sealed state, the piston structure 6 rises after a slight time, and therefore, the state of fig. 5 (a) is changed to the state of fig. 5 (B), and as a result, pressure is applied to the liquid in the valve body.

This is because the sealing time is within a certain range due to the shape of the bulge portion 91.

Then, the free secondary valve is lifted by the valve body 11 (i.e., the secondary valve is opened), and the liquid moves in the nozzle direction.

However, since the passage diameter D1 is smaller than the nozzle opening diameter D2, the liquid velocity through the nozzle opening N is smaller than the liquid velocity through the through-hole E.

In addition, since the passage diameter D1 is smaller than the nozzle opening diameter D2, the passage resistance of the liquid described above makes it difficult for the liquid to pass through the through-hole E.

Therefore, the liquid does not flow violently in the nozzle direction as in the conventional art, and therefore, the liquid is not prevented from flying violently from the nozzle opening N.

That is, the occurrence of the liquid splash phenomenon can be avoided.

Further, as described above, conventionally, it has been required to make the operation of the trigger 3 easy, and therefore, the passage diameter D1 of the secondary valve spool 11 is designed to be larger than the nozzle opening diameter D2.

Thus, if the passage diameter D1 is greater than the nozzle opening diameter D2, the velocity of the liquid through the nozzle opening N is greater than the velocity of the liquid through the through-hole E.

Further, the liquid is less resistant to the through-hole E, and the liquid is likely to pass through the through-hole E, move violently, and fly out of the nozzle opening N (liquid splash phenomenon).

The present invention is intended to suppress the occurrence of the liquid splash phenomenon from the nozzle opening N at the expense of the requirement for easy operability that eases the operation of the trigger 3 as described above.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments.

For example, fig. 1 shows a state in which an attachment 12 is attached to a water guide pipe 10 attached below a small-diameter cylinder portion 4B of a cylinder structure 4.

The attachment 12 is a cylindrical body, and a thick bottom wall 12B having a bottom hole 12A is provided inside the attachment, and the lower end of the thick bottom wall 12B is an inclined surface.

Therefore, even if the introduction tube 10 is bent halfway, the tip thereof is positioned at the corner of the bottom of the container V, and the liquid can be efficiently absorbed.

Further, even when the pump dispenser is detached from the container V for replenishing the liquid or the like, the bottom hole 12A is smaller than the inner diameter of the water conduit 10, and therefore, a larger surface tension is generated, and the liquid does not drip from the water conduit 10, and the surrounding environment is not polluted.

As long as the liquid discharge valve 9, the secondary-valve body 11, and the mortar-shaped valve seat 81 are provided as in the present invention, the shapes and structures of the other components can be changed as appropriate.

[ industrial applicability ]

The present invention can be applied to all fields of industrial and medical instruments for coating, for example, as long as the principle of the trigger pump dispenser of the present invention is used.

Description of the reference numerals

1: handle structure

1A: handle part

1B: base part

2: nozzle base structure

2A: nozzle part

2B: cylindrical base

3: trigger

31: pressing recess

32: thumb abutting part

4: cylinder structure

4A: large-diameter cylinder part

4B: small diameter cylinder part

4B 1: lower hole

4B 2: lower valve seat

5: cover

6: piston structure

6A: large diameter piston part

6B: small diameter piston part

61: inverted mortar-shaped lip

62: cylindrical protrusion

7: spring

8: valve body

81: mortar-shaped valve seat

9: drain valve

9A: bottom part

91: bulge part

92: limiting frame

10: water guide pipe

11: valve core for secondary valve

12: attachment piece

12A: bottom hole

12B: thick wall bottom wall

A: trigger type pump dispenser

V: container with a lid

E: through hole

N: a nozzle opening.