JP2007136306A - Spray nozzle valve for trigger type pump dispenser and trigger type pump dispenser using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spray nozzle valve for a trigger type pump dispenser which has a small number of parts, and has an excellent dimensional stability and a stable shape of a spring part, and the trigger type pump dispenser using the spray nozzle valve. <P>SOLUTION: The integrally molded spray nozzle valve 11 for the trigger type pump dispenser 1 has the spring 11b, a spinner 11c formed on one end side of the spring, and a valve 11a formed on the other end side of the spring. A spinner arm 11c1 extending to the valve side along the spring is formed at the spinner 11c, a valve arm 11a1 extending to the spinner side along the spring 11b is formed at the valve 11a, and the spinner arm 11c1 and the valve arm 11a1 are linked detachably each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an injection nozzle valve for a trigger type pump dispenser and a trigger type pump dispenser using the injection nozzle valve.
More specifically, the present invention relates to an injection nozzle valve for a trigger type pump dispenser which is integrally formed and has excellent dimensional stability, and a trigger type pump dispenser using this injection nozzle valve.

2. Description of the Related Art Conventionally, there is known a trigger type pump dispenser that compresses liquid in a cylinder by a turning force of a trigger and ejects the liquid from a nozzle (for example, see Patent Document 1).
In the pump dispenser described in Patent Document 1, an injection nozzle valve is provided in the horizontal portion of the liquid guide pipe in order to inject liquid from the nozzle when the trigger is pulled.
As this injection nozzle valve, for example, the one shown in FIG. 11 is known.

An injection nozzle valve 100 shown in FIG. 11 includes a spring part 101, a spinner part 102 fitted on one end side of the spring part 101, and a valve part 103 fitted on the other end side of the spring part 101. Yes.
The spinner section 102 is for narrowing the liquid flow path and ejecting the liquid vigorously, and the valve section 103 is for turning the liquid flow ON / OFF.

This ON / OFF occurs when the spring part 101 is deformed and the valve part 103 is displaced so as to balance the hydraulic pressure and the spring force of the spring part 101.
Here, for example, the spinner portion 102 and the valve portion 103 are made of resin, and the spring portion 101 is made of metal or resin.
The injection nozzle valve 100 has a spinner function, a valve function, and a spring function that are exhibited by the members 101, 102, and 103.

Japanese Patent Laid-Open No. 11-309391

However, the above-described injection nozzle valve 100 is formed by assembling the independent spinner portion 102 and the valve portion 103 with respect to the spring portion 101, which is not advantageous in terms of the number of parts and assembly man-hours.
For this reason, as shown in FIG. 12, the injection nozzle valve 200 has been developed as an integrally molded product. However, the spring portion 200a is deformed by the heat shrinkage after the injection molding, and the total length of the injection nozzle valve 200 is increased. There was a problem that it was not stable and the coaxiality of the injection nozzle valve 200 deteriorated.

Furthermore, when the injection nozzle valve 200 is incorporated in a trigger type pump dispenser, the spring 200a may be twisted in the process of being locked, and the shape may not be stable, resulting in an imbalance in the spring force.
The injection nozzle valve 200 is an integrally molded product having a spinner function, a valve function, and a spring function, that is, a three-function integrated type.

The present invention has been made to solve the above-described problems.
That is, the present invention provides an injection nozzle valve for a trigger type pump dispenser having a small number of parts, excellent dimensional stability, and having a stable spring shape, and a trigger type pump dispenser using the injection nozzle valve. With the goal.

  Thus, as a result of earnest research on the background of such problems, the present inventor formed an arm portion along the spring portion in each of the spinner portion and the valve portion, and connected via these arm portions. The present inventors have found that the above-mentioned problems can be solved by using an integrally molded product having a shape, and the present invention has been completed based on this finding.

  That is, the present invention provides (1) an integrally molded trigger having a spring part, a spinner part formed on one end side of the spring part, and a valve part formed on the other end side of the spring part. An injection nozzle valve for a pump dispenser, wherein the spinner portion is formed with a spinner arm portion extending toward the valve portion along the spring portion, and the valve portion is formed along the spring portion. Thus, the present invention resides in an injection nozzle valve for a trigger type pump dispenser in which a valve arm portion extending toward the spinner portion is formed and the spinner arm portion and the valve arm portion are detachably connected to each other.

  The present invention also resides in (2) an injection nozzle valve for a trigger type pump dispenser according to the above (1), wherein the tip of the spinner arm and the tip of the valve arm are connected via a thin portion. .

  Further, according to the present invention, (3) the spinner arm portion and the valve arm portion are formed in pairs, and the spinner arm portion and the valve arm portion formed in pairs are opposed to each other across the spring portion. A spinner hand portion and a valve hand portion are formed at the tips of the spinner arm portion and the valve arm portion, respectively, and one hand portion is provided on each of the spinner hand portion and the valve hand portion. A stepped portion that engages with the other hand portion is formed, and the stepped portions disposed at the paired positions are formed in alternate directions in the rotation direction of the spinner portion, and the spinner portion is rotated in either direction. Even if it is made to exist, it exists in the injection nozzle valve for trigger type pump dispensers as described in said (1) made to rotate with the said valve | bulb part.

  Moreover, this invention exists in the injection nozzle valve for trigger type pump dispensers as described in said (1) by which the said spring part was made into the shape which bent the strip | belt material in the shape of a bellows.

  Moreover, this invention exists in the injection nozzle valve for trigger type pump dispensers of the said (1) description which cuts | disconnects the said thin part by receiving a tensile force (5).

  Moreover, this invention exists in the injection nozzle valve for trigger type pump dispensers of the said (5) description which the said thin part cut | disconnects when a spinner part and a valve | bulb part approach.

  Moreover, this invention exists in the trigger type pump dispenser incorporating the injection nozzle valve for the trigger type pump dispenser of (7) and the said Claim 1.

  The present invention also includes (8) a screw nozzle that moves in the liquid ejecting direction by rotating, and the spinner arm and the valve arm are brought close to each other by the pressing force of the screw nozzle. The injection nozzle valve for the trigger type pump dispenser described in the above (7) is disconnected.

  In addition, as long as the objective of this invention is met, the structure which combined the said invention suitably is also employable.

In the injection nozzle valve for the trigger type pump dispenser of the present invention, the spinner portion is formed with a spinner arm portion extending toward the valve portion along the spring portion, and the spinner portion side along the spring portion is formed on the valve portion. The tip of the spinner arm and the tip of the valve arm are connected via a thin-walled portion, so it can be integrally formed by injection molding, and the number of parts is small. In addition, after the injection molding, the deformation of the spring portion due to the contraction of the resin is suppressed as much as possible, and a molded product having excellent dimensional stability can be obtained.
Further, the spring portion is not twisted, and the spring can be used in a stable state.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows an embodiment of a trigger type pump dispenser using an injection nozzle valve for the trigger type pump dispenser of the present invention.
FIG. 1 shows a state before the virgin seal of the trigger type pump dispenser 1 is released.
A trigger-type pump dispenser 1 of this embodiment includes a cylindrical cap 2 that is screwed onto a mouth of a container, and a multi-stage cylindrical main body 3 that is inserted into and fixed to the cylindrical cap 2. ,have.

A handle portion 3a is integrally formed on the multistage cylindrical main body portion 3 so as to be hooked to other portions when the trigger type pump dispenser 1 is not used.
A multi-stage cylindrical cylinder 4 is inserted in the main body 3.

A tube 5 in which the liquid in the container rises and flows is fitted into the lower end side of the cylinder 4, and a valve 6 is disposed directly above the tube 5.
In the vicinity of the upper end of the main body 3, a trigger member 7 that serves as a trigger for ejecting liquid is attached to the main body 3.
The trigger member 7 is rotatable about a rotation axis K located immediately above the handle portion 3a.

When the trigger member 7 is pulled in a state where the trigger type pump dispenser 1 is attached to the liquid container, a recess 7a (located on the central axis of the cap 2) formed in the trigger member 7 is formed on the piston member 8A. A spherical small protrusion formed on the upper end is pressed.
Then, the piston members 8A, 8B, 8C are lowered, and the liquid is ejected from the nozzle port N.

The piston member 8A is formed with a cylindrical extending portion 8Aa extending along the liquid ejecting direction.
The space inside the extension portion 8Aa and the flow path constituted by the piston members 8A to 8C are communicated to form an L-shaped flow path.
The cylinder member 10 is inserted and fixed in the L-shaped flow path.

Furthermore, the injection nozzle valve 11 of the present invention is inserted inside the cylinder member 10.
Further, a screw portion 10a is formed on the outer periphery on the tip side of the cylinder member 10, and a screw nozzle 9 having a female screw is screwed into the screw portion 10a.
Therefore, when the screw nozzle 9 is screwed and rotated, the screw nozzle 9 moves along a direction parallel to the liquid ejecting direction (the right direction in FIG. 1).
Incidentally, in FIG. 1, the injection nozzle valve 11 is pushed in the right direction in the drawing by the screwing of the screw nozzle 9, and the valve portion 11a is seated.
Further, the outer peripheral surface of the screw nozzle 9 is provided with a non-slip function so as to be easily screwed.

  Specifically, as shown in FIG. 2, a large number of slits are formed on the outer peripheral surface of the screw nozzle 9 at regular intervals along the axial direction of the screw nozzle 9.

3 to 6 show details of the injection nozzle valve 11 for the trigger type pump dispenser of the present invention.
3 is a perspective view, FIG. 4 is a side view, FIG. 5 is a front view (viewed from the spinner side), and FIG. 6 is a rear view (viewed from the valve side).

The injection nozzle valve 11 of this embodiment includes a spinner portion 11c, a spring portion 11b, and a valve portion 11a.
The spring portion 11b has a shape in which the belt body is bent in a bellows shape, a spinner portion 11c is formed on one end side of the spring portion 11b, and a valve portion 11a is formed on the other end side of the spring portion 11b.
Unlike the coil spring shape, the bellows-shaped spring portion 11b has an advantage that the punching die is easy.
The injection nozzle valve 11 is a molded product obtained by integrally injection-molding the spinner portion 11c, the spring portion 11b, and the valve portion 11a.

  Examples of the resin material constituting the injection nozzle valve 11 include polybutylene terephthalate (PBT), polyimide (PI), polymethyl methacrylate (PMMA), polyethylene (PE), polypropylene (PP), polystyrene (PS), Polyvinyl chloride (PVC), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), polycarbonate (PC), polyether sulfone (PES), polyphenyl sulfide (PPS), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polyethylene naphthalate (PEN), polyetherimide (PEI), polyetheretherketone (PEEK), or the like can be used.

  It is also possible to perform simultaneous injection molding using different materials selected from the above resins for the spinner portion 11c, the spring portion 11b, and the valve portion 11a.

The spinner part 11c is formed with two (ie, a pair) spinner arm parts 11c1 extending toward the valve part 11a along the spring part 11b.
Similarly, the valve portion 11a is formed with two valve arm portions 11a1 extending toward the spinner portion 11c along the spring portion 11b.

The two spinner arm portions 11c1 and the valve arm portions 11a1 formed in pairs are arranged so as to form a pair with the spring portion 11b interposed therebetween.
Since two spinner arm portions 11c1 and two valve arm portions 11a1 are formed, the geometrical symmetry of the injection nozzle valve 11 is increased, the symmetry of heat shrinkage during injection molding is improved, and the overall dimensional accuracy is uniform. Guaranteed.
Further, as can be seen from the drawing, since the spring portion 11b is formed so as to be supported between the spinner arm portion 11c1 and the valve arm portion 11a1, contraction due to temperature change of the spring portion is prevented.

A spinner hand portion 11c1a and a valve hand portion 11a1a are formed at the tips of the spinner arm portion 11c1 and the valve arm portion 11a1, respectively.
The spinner hand portion 11c1a and the valve hand portion 11a1a are formed as a step portion 11c1b and a step portion 11a1b in which one hand portion engages with the other hand portion, respectively.

The two step portions 11c1b and 11a1b, which are arranged at two positions, are formed in different directions in the rotation direction of the spinner portion 11c.
For this reason, the spinner portion 11c is rotated with the valve portion 11a regardless of which direction (ie, forward or reverse direction) is rotated.
Accordingly, since the spring portion 11b is not twisted, it is possible to reliably prevent the spring force from becoming uneven.

Further, the tip of the spinner arm portion 11c1 and the tip of the valve arm portion 11a1 are connected via a thin portion 11d so as to be detachable from each other (see an enlarged view of FIG. 7).
As will be described later, the thin portion 11d is thin enough to be stretched and cut by the approach of the valve portion 11a and the spinner portion 11c.

On the other hand, a cone-shaped protrusion 11a2 is formed on the valve portion 11a.
The cone-shaped protrusion 11a2 increases the directionality of the parts feeder during assembly and improves the transportability.
An annular groove 11a3 is formed at the base of the cone-shaped protrusion 11a2.
The annular groove 11a3 causes a so-called sink phenomenon on the spherical surface 11a5 (that is, the contact surface of the cylinder member 10 with respect to the valve seat) constituting the one surface of the valve portion 11a due to the thermal contraction of the molded product after injection molding. Can be prevented.
That is, by providing the annular groove 11a3, the thickness of the spherical surface of the valve portion 11a is reduced, and the sink phenomenon is less likely to occur.

In addition, four wing parts 11a4 are formed in a cross shape on the valve part 11a.
The movement of the injection nozzle valve 11 itself is restricted by the wing part 11a4, and the liquid can pass between the wing parts 11a4.
Similarly, four wing parts 11c2 are formed in the spinner part 11c, and play the same role as the wing part 11a4 of the valve part 11a.

  A disc portion 11c3 is formed at one end of the spinner portion 11c, and slits 11c3a for allowing liquid to flow to the nozzle port N are formed at two locations in the circumferential direction of the disc portion 11c3.

Next, the cutting principle of the thin portion 11d that becomes the virgin seal will be described.
The virgin seal refers to a sealing function that is released at the beginning of use and becomes usable.

FIG. 8 is a view for explaining the cutting principle by enlarging the spinner hand portion 11c1a and the valve hand portion 11a1a in the injection nozzle valve 11. As shown in FIG.
The state of FIG. 8A is the time of product shipment shown in FIG. 1 and shows the state of the injection nozzle valve 11 incorporated in the trigger type pump dispenser 1.
In this state, the trigger-type pump dispenser 1 cannot be used, and for example, the liquid is not inadvertently ejected. Therefore, this is particularly effective when the liquid is a harmful substance such as an insecticide.

When the dispenser user rotates the screw nozzle 9 in the screwing direction from the state shown in FIG. 8A, the tip of the injection nozzle valve 11 is pushed by the inner surface of the tip of the screw nozzle 9, and the injection nozzle valve 11 moves in the direction opposite to the liquid outflow direction (that is, the right direction in the figure).
In this case, the spray nozzle valve 11 rotates together with the rotation of the screw nozzle 9 by the frictional force between the tip of the spray nozzle valve 11 and the inner surface of the tip of the screw nozzle 9.
However, since the spinner portion 11c and the valve portion 11a are integrally connected via the spring portion 11b, the spring portion 11b is not twisted as a whole as a whole.

  When the injection nozzle valve 11 moves rightward and the spherical surface 11a5 of the valve portion 11a is seated on the valve seat portion 10c of the cylinder member 10 (not shown), the pulling force is exerted on the thin portion 11d by the approach of the valve portion 11a and the spinner portion 11c. Acts (see FIG. 8B).

Further, when the tip of the spinner portion 11c moves to the right, the thin portion 11d is pulled and cut.
Thus, the spinner portion 11c, the valve portion 11a, and the spring portion 11b are separated from each other and isolated, and the elastic function of the spring portion 11b is exhibited.

When the screw nozzle 9 is further pushed in, the spinner hand portion 11c1a and the valve hand portion 11a1a are completely engaged with each other as shown in FIG. 8 (d).
In this state, the valve portion 11a (specifically, the spherical surface 11a5 of the valve portion 11a) cannot be detached from the valve seat portion 10c of the cylinder member 10, and is in a so-called “locked state”.
It should be noted that in this locked state, the screw nozzle 9 is preferably designed so that it abuts against the annular protrusion 10b of the cylinder member 10 and stops.

Next, the movement of the injection nozzle valve 11 will be described.
FIG. 9A shows a state where the screw nozzle 9 is rotated in the screwing direction to move the injection nozzle valve 11 in the right direction (that is, the direction opposite to the liquid outflow direction).

After releasing the virgin seal by operating the screw nozzle 9 from the state of FIG. 9A (described in FIG. 8 above), the screw nozzle 9 is slightly rotated in the opposite direction and returned. The state is shown in FIG.
In this state, the valve portion 11a can be easily detached from the valve seat portion 10c of the cylinder member 10 by receiving the hydraulic pressure.
This is because there is a degree of freedom of movement between the spinner hand portion 11c1a and the valve hand portion 11a1a.
The injection nozzle valve 11 is moved by sliding along the guide member 12 disposed in the cylinder member 10.

In the state of FIG. 9B, it can be said that the trigger type pump dispenser 1 is in a usable state.
That is, when the trigger type pump dispenser 1 is attached to the liquid container, when the trigger member 7 is pulled, the spherical surface 11a5 of the valve portion 11a is easily separated from the valve seat portion 10c by the liquid pressure from the cylinder 4, and the liquid is discharged from the nozzle It can inject from the opening | mouth N [refer FIG.9 (c)].
By the way, the state shown in FIG. 9C is a state in which injection is possible by the hydraulic pressure. From this state, when the screw nozzle 9 is screwed in until the spinner hand portion 11c1a and the valve hand portion 11a1a come into contact with each other, the spherical surface 11a5 is obtained. Is seated on the valve seat 10c and is in the locked state described above.
FIG. 10 shows the locked state.

  As described above, in the injection nozzle valve 11 for the trigger type pump dispenser according to the embodiment described above, the spinner arm 11c1 extending to the valve portion 11a side along the spring portion 11b is formed in the spinner portion 11c. Is formed with a valve arm portion 11a1 extending toward the spinner portion 11c along the spring portion 11b, and the tip of the spinner arm portion 11c1 and the tip of the valve arm portion 11a1 are connected via a thin portion 11d. Further, it can be integrally molded by injection molding, and the number of parts can be reduced. Further, deformation of the molded product due to resin shrinkage after injection molding can be suppressed, and a molded product having excellent dimensional stability can be obtained.

  Further, two spinner arm portions 11c1 and two valve arm portions 11a1 are formed, and step portions 11a1b and 11c1b are formed therein, and the valve portion can be rotated regardless of which direction the spinner portion 11c is rotated as described above. Since it is made to rotate with 11a, four functions of a spinner function, a valve function, a spring function, and a rotating function are achieved in one injection-molded product, and a multi-function type injection nozzle valve can be provided.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the essence thereof.
For example, in the above-described embodiment, the example in which the spinner hand portion 11c1a and the valve hand portion 11a1a are engaged by the stepped portion has been described. However, as long as the purpose is satisfied, the shape of the engaging portion can be changed.
Naturally, the shapes of the spinner part and the valve part can also be modified.
Furthermore, although the virgin seal with the thin wall portion is shown in the embodiment, it is of course possible to provide another virgin seal in a part of the trigger type pump dispenser.

FIG. 1 is an explanatory view showing an embodiment of a trigger type pump dispenser using an injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 2 is an explanatory view showing a form when the trigger type pump dispenser of FIG. 1 is viewed from above. FIG. 3 is a perspective view of an injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 4 is a side view of an injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 5 is a front view of an injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 6 is a rear view of an injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 7 is an explanatory view showing the vicinity of the thin portion of the injection nozzle valve for the trigger type pump dispenser of the present invention. FIG. 8 is an explanatory view showing a cutting principle of a thin portion that becomes a virgin seal. (A) is a state at the time of product shipment, (b) is a state where the spinner part is moved to the valve part side along a direction parallel to the liquid outflow direction, and (c) is a direction where the spinner part is further parallel to the liquid outflow direction. And (d) shows a state in which the spinner hand part and the valve hand part are completely engaged. FIG. 9 is an explanatory view showing the movement of the injection nozzle valve. (A) is a state in the middle of rotating the screw nozzle in the screwing direction, (b) is a state in which the valve portion is seated, and (c) is a state. The state which pulled the trigger member and injected the liquid is shown. FIG. 10 is an explanatory view showing a locked state of the injection nozzle valve. FIG. 11 is an explanatory view showing an embodiment of a conventional injection nozzle valve (three-function separate type). FIG. 12 is an explanatory view showing an embodiment of a conventional injection nozzle valve (three-function integrated type).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trigger type pump dispenser 2 Cap 3 Main-body part 3a Handle part 4 Cylinder 5 Tube 6 Valve 7 Trigger member 7a Recessed part 8A-8C Piston member 8Aa Extension part 9 Screw nozzle 10 Cylinder member 10a Screw part 10b Annular protrusion 10c Valve seat Part 11 Injection nozzle valve 11a Valve part 11a1 Valve arm part 11a1a Valve hand part 11a1b Step part 11a2 Cone-shaped protrusion 11a3 Annular groove 11a4 Wing part 11a5 Spherical surface 11b Spring part 11c Spinner part 11c1 Spinner arm part 11c1a Spinner arm part 11c1a 11 Part 11c3 Disc part 11c3a Slit 11d Thin part 12 Guide member 100 Injection nozzle valve 101 Spring part 102 Spinner part 103 Valve part 200 Injection nozzle valve 20 a spring portion K pivot axis N nozzle opening

Claims (8)

A spring part,
A spinner part formed on one end side of the spring part;
A valve portion formed on the other end of the spring portion;
An injection nozzle valve for an integrally molded trigger pump dispenser having:
The spinner part is formed with a spinner arm part extending toward the valve part along the spring part,
The valve portion is formed with a valve arm portion extending toward the spinner portion along the spring portion,
An injection nozzle valve for a trigger type pump dispenser, characterized in that a spinner arm portion and a valve arm portion are connected so as to be separable from each other.   The injection nozzle valve for a trigger-type pump dispenser according to claim 1, wherein the tip of the spinner arm and the tip of the valve arm are connected via a thin portion. The spinner arm part and the valve arm part are formed in pairs,
The spinner arm part and the valve arm part formed by two each are arranged so as to form a pair with the spring part interposed therebetween,
A spinner hand portion and a valve hand portion are formed at the tips of the spinner arm portion and the valve arm portion, respectively.
The spinner hand part and the valve hand part are each formed with a step part in which one hand part is engaged with the other hand part,
The step portions arranged at the paired positions are formed in a staggered direction in the rotation direction of the spinner portion so that the spinner portion rotates with the valve portion in any direction. An injection nozzle valve for a trigger type pump dispenser according to claim 1.   2. The injection nozzle valve for a trigger type pump dispenser according to claim 1, wherein the spring portion is formed by bending a belt member into a bellows shape. 3.   The injection nozzle valve for a trigger type pump dispenser according to claim 2, wherein the thin portion is cut by receiving a pulling force.   6. The injection nozzle valve for a trigger type pump dispenser according to claim 5, wherein the thin portion is cut when the spinner portion and the valve portion approach each other.   The trigger type pump dispenser incorporating the injection nozzle valve for the trigger type pump dispenser according to claim 1. A screw nozzle that moves in the liquid jet direction by rotating,
8. The injection for a trigger type pump dispenser according to claim 7, wherein the spinner part and the valve part come close to each other by the pressing force of the screw nozzle, and the connection between the spinner arm part and the valve arm part is cut off. Trigger type pump dispenser incorporating a nozzle valve.

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