JP2010269221A - Piston cylinder unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piston cylinder unit capable of being versatilly applied even to a trigger spray of different type by modulating a main functional structure. <P>SOLUTION: In the piston unit A incorporated in the trigger spray for jetting a liquid from a nozzle part 21 to the outside by sliding a piston part 23 up and down with the rotation of the trigger to apply pressure to the liquid in the cylinder, a nozzle piston structure 2 provided with a joining part for joining the nozzle part 21 and the piston part 23 and a cylinder part 1 are modulated as a unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a piston cylinder unit incorporated in a trigger spray.
More specifically, the present invention relates to a trigger spray that can be applied universally to different types of trigger sprays by modularizing the main functional structure.
Conventionally, a trigger spray that slides the piston part up and down by the rotation of the trigger to apply pressure to the liquid in the cylinder part and injects it from the nozzle part has been used as a small-sized liquid injection device (patent) Reference 1 and Patent Reference 2).

  In this trigger spray, the piston part, the cylinder part, and the nozzle part are the so-called engine part that is an important functional part. These piston part, cylinder part, and nozzle part are each attached to the base body.

And this base body is fixed to a container mouth part using a cap.
Today, many different types of trigger sprays have been put on the market due to product diversification, and the structure of the piston part, cylinder part, and nozzle part differs depending on such trigger sprays.
Therefore, since the structure of the base body is different for each trigger spray, the design man-hour for the trigger spray increases and the assembly man-hour increases.
That is, the manufacturing is complicated and the cost is increased.

JP 2008-194642 A JP 2009-56372 A

The present invention has been made on the basis of such background technology, and has been made to overcome the above technical problems and is extremely useful.
That is, an object of the present invention is to provide a piston / cylinder unit that can be applied universally to different types of trigger sprays by modularizing the main functional structure.

  Thus, as a result of intensive research on the background of such problems, the inventors have integrated the cylinder part, piston part, nozzle part, and the structure in which the piston part does not come out from the cylinder part. It has been found that modularization as an engine part is possible, and the present invention has been completed based on this finding.

  That is, the present invention is (1) a piston cylinder that is incorporated into a trigger spray that slides the piston part up and down by the rotation of the trigger to apply pressure to the liquid in the cylinder part and injects it from the nozzle part to the outside. The unit is a piston cylinder unit in which a nozzle piston structure including a nozzle part and a piston part, and a coupling part that couples both, and a cylinder part are modularized as a unit.

  The present invention also resides in (2) the piston / cylinder unit described in the above (1), wherein the cylinder portion is provided with a stopper for preventing the piston from slipping out (that is, for restricting the upper limit).

  Moreover, this invention exists in the piston cylinder unit of the said (1) description by which the attachment means for the attachment at the time of incorporating in a trigger spray is provided in the outer periphery of a cylinder part (3).

  Moreover, this invention exists in the piston cylinder unit of the said (3) description which is (4) and the attaching means is the collar part which protruded on the outer periphery of the cylinder part.

  Moreover, this invention exists in the piston cylinder unit of the said (1) description by which the pivoting part for connecting with a trigger is formed in the outer periphery of a cylinder part (5).

  Moreover, this invention exists in the piston cylinder unit of the said (1) description whose trigger spray has a structure where the rotation fulcrum of the trigger protruded from the cap part of the container.

  Moreover, this invention exists in the piston cylinder unit of the said (1) description which has (7) the trigger spray which has a structure which rotates a trigger via a slider.

  Moreover, this invention exists in the piston cylinder unit of the said (1) description which is equipped with the pressure accumulation function by incorporating the pressure accumulation provision valve in the piston part (8).

  In addition, as long as the objective of this invention is met, the structure which combined the said (1) to (8) suitably is also employable.

The piston cylinder unit of the present invention is a piston cylinder unit that is incorporated into a trigger spray that slides the piston part up and down by the rotation of the trigger to apply pressure to the liquid in the cylinder part and injects it from the nozzle part to the outside. is there.
A nozzle piston structure including a nozzle part, a piston part, and a coupling part that couples both, and a cylinder part are modularized as a unit.

Therefore, since the common main functional unit as the trigger spray is unitized, it can be easily applied to various types of trigger sprays.
Therefore, the assembly man-hour as a trigger spray is reduced, the productivity is increased, and the cost is naturally reduced.

FIG. 1 is a cross-sectional view showing a trigger spray incorporating the piston cylinder unit of the present invention. FIG. 2 is a cross-sectional view of a state in which the trigger spray trigger in FIG. 1 is rotated. FIG. 3 is a cross-sectional view showing a single piston cylinder unit. FIG. 4 is an external view showing a single unit of the piston cylinder unit. FIG. 5 is an enlarged cross-sectional view of a main part for explaining the pressure accumulating valve, where (A) shows a state before the trigger is pulled, and (B) shows a state after the trigger has been pulled. FIG. 6 is a cross-sectional view showing another example of a trigger spray incorporating the piston cylinder unit of the present invention. FIG. 7 is a cross-sectional view of a state in which the trigger spray trigger in FIG. 6 is rotated. FIG. 8 is a cross-sectional view showing different examples of attachment means provided on the outer periphery of the cylinder portion of the piston cylinder unit of the present invention, (A) shows the attachment means of the piston cylinder unit, (B) has an annular rib on the lower surface of the collar part, and (C) has a collar part formed in an L-shaped section and three convex parts. FIG. 9 is a diagram illustrating the versatility of the piston cylinder unit. FIG. 10 is a sectional view showing another type of trigger spray incorporating the piston cylinder unit of the present invention.

[First Embodiment]
Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of a trigger spray in which the piston cylinder unit of the present invention is incorporated, and FIG. 2 is a cross-sectional view in a state where the trigger of the trigger spray is rotated.

  3 is a sectional view showing a single piston cylinder unit, and FIG. 4 is an external view of the piston cylinder unit (note that the piston cylinder unit of FIG. Is visible).

The piston cylinder unit of the present invention is incorporated into a trigger spray that slides the piston part 23 up and down by the rotation of the trigger 4 to apply pressure to the liquid in the cylinder part 1 and sprays the liquid from the nozzle part 21 to the outside. It is.
And the nozzle piston structure 2 provided with the coupling | bond part which couple | bonds both a nozzle part and a piston part, and the cylinder part 1 are modularized as a unit.

That is, the piston-cylinder unit A is constituted by the nozzle piston structure 2 and the cylinder part 1.
As described above, the piston cylinder unit A is modularized with a main function unit common to various trigger sprays as a unit.
First, the nozzle piston structure 2 includes a nozzle portion 21 and a piston portion 23 and a coupling portion 22 that couples both, and the whole is integrated.

The piston part 23 of the nozzle piston structure 2 slides in the cylinder part 1.
The piston portion 23 is provided with a stopper 3 for preventing the nozzle piston structure 2 from slipping out (that is, for restricting the upper limit of movement of the piston portion).
For this reason, the nozzle piston structure 2 and the cylinder part 1 are united and unitized.
In the unitized piston cylinder unit A, the nozzle piston structure 2 and the cylinder part 1 do not come off during handling when transporting or assembling.

As an example of the stopper 3, a separate ring-shaped stopper that can be press-fitted and fixed to the cylinder portion 1 is employed.
When the stopper 3 includes a locking portion (not shown) for fixing to the cylinder portion 1, a strong fixing force can be obtained.
Further, the stopper 3 is not limited to a separate body from the cylinder portion 1, and can be integrally formed.
For example, if the stopper 3 is integrally hinged to the cylinder portion 1, it can be assembled by simply rotating the stopper via the hinge portion (not shown), and positioning at that time can be easily performed.
If the stopper 3 and the cylinder portion 1 are integrally formed, the number of parts is reduced and the cost is low. In addition, the stopper is not lost during assembly.
As will be described later, the stopper 3 plays another role in addition to preventing the stopper 3 from coming off.
That is, in the state where the nozzle piston structure 2 is incorporated in the trigger spray, the upper limit of the piston portion 23 is determined.

By the way, on the outer periphery of the cylinder part 1, when the piston cylinder unit A is incorporated in the trigger spray, attachment means necessary for coupling the two is provided.
The piston cylinder unit A can be applied universally to various trigger sprays by providing mounting means corresponding to the piston cylinder unit A for various trigger sprays. Become.

As an attaching means, the means which provides the collar part 11 and the convex part 12 which protruded on the outer periphery of the cylinder part 1 is mentioned, for example (refer FIG. 8).
Here, since the piston part 23 of the piston cylinder unit A must move up and down in order to compress the liquid in the cylinder part 1, it needs to be connected with the trigger.
Therefore, a pivoting portion 23B (see FIG. 4) for connection with the trigger is provided on the outer periphery of the cylinder portion 1.
As the pivot part 23B, a pair of bosses are formed on both sides of the outer periphery of the cylinder part 1 so as to project into the hole (not shown) of the trigger, thereby forming the pivot part 23B.
The above is the outline of the piston cylinder unit A. Next, the nozzle piston structure 2 and the piston portion 23 which are the elements will be described in more detail.

(Nozzle piston structure)
The nozzle piston structure 2 integrally has a nozzle part 21 at the front, a piston part 23 at the rear, and a connecting part 22 that connects the nozzle part 21 and the piston part 23 together.
The material of the nozzle piston structure 2 is formed of an elastically deformable resin such as linear linear low density polyethylene (LLDPE), silicone resin, or elastomer resin.

Only the connecting portion 22 can be made of a material having excellent elastic flexibility.
The nozzle unit 21 is attached and fixed to a part of the front of the trigger spray.
A large number of fins 22A are formed on the surface of the connecting portion 22. Even if the fins 22A are made of a material having elastic flexibility, the internal passage (cross section) is not deformed and crushed.
For example, even when the connecting portion 22 is made of a soft material such as silicone resin, the connecting portion 22 is not crushed due to deformation of its internal passage.

For this reason, the connecting portion 22 can be sufficiently bent by 90 degrees or more.
Further, since the connecting portion 22 of the nozzle piston structure 2 can be bent at an angle of 90 degrees or more, the nozzle piston structure 2 can be injection-molded in a straight line state.
Incidentally, when the nozzle piston structure 2 is molded by a mold, the piston part 23, the connecting part 22 and the nozzle part 21 are in a straight line as a whole.
Therefore, it can be bent and assembled. Further, there is an advantage that a restoring force is generated in the connecting portion 22 after assembly.
Further, since the injection molding can be performed in a straight line state, the nozzle piston structure 2 can be molded as much as possible from a mold having a certain size.

(Cylinder part)
The cylinder part 1 receives the piston part 23 of the nozzle piston structure 2 described above, and the piston part 23 slides in the cylinder part 1.
And the upper limit at the time of sliding of the piston part 23 is regulated by the stopper 3 press-fitted and fixed to the inner wall.
Further, on the outer periphery of the piston portion 23, there are provided attachment means (for example, a protruding collar portion 11 and a convex portion 12) that function during assembling.
The collar part 11 is sandwiched and attached between the cap part 6 and the container mouth part C1.
Further, the convex portion 12 exerts a frictional force when being pressed into the container mouth portion C1 (FIGS. 1 and 6 are examples in which the convex portion 12 is not provided).
This attachment means is provided in order to ensure attachment to the trigger spray to be assembled.
The cylinder part 1 has several parts with different diameters on the lower side, and a return spring S for applying the return force of the first valve FV and the trigger is attached to this part.
Note that when the trigger spray is set in the container, the liquid in the container passes through the first valve FV and is sucked into the cylinder portion 1.
The piston cylinder unit A as described above may or may not have a pressure accumulating function, but the one having a pressure accumulating function will be described in detail below.

(Pressure accumulation valve)
FIG. 5 is an enlarged cross-sectional view of a main part for explaining the pressure accumulating valve, where (A) shows a state before the trigger is pulled, and (B) shows a state where the trigger has been pulled.
The piston cylinder unit A has a pressure accumulation function by including the pressure accumulation application valve 5 in the cylinder portion 23.
As shown in FIG. 3, the pressure accumulation application valve 5 includes a second valve 51 and a second valve cover 53 for housing the second valve 51.
The second valve 51 has a flange 51A around it and is hollow inside.
The head is formed in a curved surface, and can uniformly contact the piston valve seat 23D.
The second valve 51 contacts or separates from the piston valve seat 23D to close or open the liquid flow path.

A blade spring 53B (divided into a plurality of pieces and presses the mortar-shaped bottom surface of the second valve 51 upward) is integrally formed upright on the bottom of the second valve cover 53.
Due to the elastic force of the blade spring 53B, the second valve 51 is pressed against the piston valve seat 23D.
In order to press the second valve 51 against the piston valve seat 23D, it is possible to use an independent separate coil spring instead of the blade spring 53B.

The upper end of the second valve cover 53 is press-fitted into a groove 23 </ b> C formed in the piston portion 23 and attached.
As described above, since the second valve cover 53 can be attached to the piston portion 23, it is easy to easily impart the pressure accumulation function even in the direct pressure dispenser in which the pressure accumulation imparting valve 5 is not used.

Since the pressure accumulation imparting valve 5 has such a configuration, when the trigger 4 (see FIG. 2) is pulled and the pressure in the cylinder portion 1 is accumulated to increase a certain pressure as will be described later, the piston valve seat 23D and the second valve are all at once. The liquid enters between 51 and flows into the flow path.
Then, the liquid is ejected from the ejection port N of the nozzle portion 21.
By the way, when the storage portion R is filled with liquid by the vertical movement of the second valve 51 in the pressure accumulation application valve 5, the movement of the second valve 51 becomes dull and the pressure accumulation function is lowered. However, the second valve 51 may not be opened and spraying may not be possible. However, since the storage portion R is sealed by the flange portion 51A, liquid does not normally enter.

However, even if the flange 51A is deformed due to some reason and the liquid enters the storage part R, the second valve 51 is hollow so that air accumulates there, and the whole storage part enters normally. It will not be filled with liquid.
Of course, during the upside down, the air inside the second valve 51 moves to the bottom of the second valve cover 53 so that the entire storage portion is not filled with liquid.
Therefore, it is avoided that the spray becomes impossible.

  In addition, as a material of each component of the pressure accumulation imparting valve 5, for example, the second valve 51 and the second valve cover 53 are made of polypropylene.

The piston cylinder unit A as described above can be incorporated in a trigger spray for general use.
The piston cylinder unit A that does not include the pressure-accumulation giving valve 5 can naturally be applied.

(Application example 1)
Returning to the original, the trigger spray shown in FIG. 1 is of a type having a structure in which the trigger 4 is rotatable with respect to the cap portion 6 also serving as a base portion.
The piston cylinder unit A is attached to the mouth portion C1 of the container C using the cap portion 6.
On the outer periphery of the piston cylinder unit A, there is provided attachment means for the trigger spray A to be assembled (here, the protruding flange part 11). The flange part 11 is connected to the mouth part C1 of the container C by the cap part 6. Press to fix.
A protrusion 61 is formed behind the cap 6, and the trigger 4 is supported by the protrusion 61 so as to be rotatable (point P is a rotation fulcrum).

On the other hand, the nozzle portion 21 of the piston cylinder unit A is attached to the front portion of the trigger 4, and the nozzle portion 21 moves up and down as the trigger 4 rotates.
When the trigger 4 is grasped with a finger and pulled, the piston portion 23 is lowered and the liquid in the cylinder portion 1 is ejected from the nozzle portion 21 as shown in FIG. When the finger is released from the trigger 4, it returns as shown in FIG. 1 by the force of the return spring S.
At this time, the piston part 23 comes into contact with the stopper 3 and the upper limit of the movement of the piston part 23 is determined (in the drawing, a gap is shown for the sake of convenience).
As the nozzle portion 21 moves up and down and the piston portion 23 moves up and down, the coupling portion 22 that couples both the nozzle portion 21 and the piston portion 23 can be elastically bent (that is, because it is flexible). You can absorb those movements.

(Application example 2)
FIG. 6 is a cross-sectional view showing another example of a trigger spray incorporating the piston cylinder unit of the present invention.
FIG. 7 is a cross-sectional view of a state in which the trigger spray trigger in FIG. 6 is rotated.
This trigger spray has a structure in which the trigger 4 is rotated via a slider.
The piston cylinder unit A is attached to the mouth portion C1 of the container C using the cap portion 6.

Mounting means (here, protruding flange portion 11) is provided on the outer periphery of the piston cylinder unit A, and the piston cylinder unit A is pushed into the mouth portion C1 of the container C and fixed by the cap portion 6.
The trigger 4 is supported by a part of the cap portion 6 protruding upward so as to be rotatable (P point is a rotation fulcrum).
Since the slider 4A corresponding to the auxiliary trigger is in contact with the front end of the trigger 4, when the finger is pulled by pulling the slider 4A, the slider 4A moves horizontally, and the trigger 4 rotates upward.
Therefore, the opposite side of the trigger 4 is lowered and the piston portion 23 connected thereto is also lowered, and the liquid in the cylinder portion 1 is jetted from the nozzle portion 21.
When the finger is released from the slider 4A, the return spring S returns as shown in FIG.
At this time, the piston part 23 comes into contact with the stopper 3 and the upper limit of the movement of the piston part 23 is determined (in the figure, for the sake of convenience, a gap is shown to distinguish the boundary, but the other figures are the same). is there).

  On the other hand, the nozzle part 21 is attached and fixed to the front part of the cover body 7, and the flexible coupling part that couples the nozzle part 21 and the piston part 23 even if the trigger 4 rotates and the piston part 23 moves up and down. Since the nozzle 22 absorbs the movement, the nozzle portion 21 does not move up and down.

(Other variations of attachment means)
FIG. 8 shows different examples of attachment means provided around the cylinder portion 1 of the piston cylinder unit A. FIG.
Since the piston cylinder unit A is provided with this attachment means, it can be easily incorporated into a trigger spray to be assembled.
FIG. 8 (A) shows the mounting means of the piston cylinder unit A described above, and is provided with a flange portion 11 and a convex portion 12.
8B has an annular rib on the lower surface of the flange portion 11, and FIG. 8C shows that the flange portion 11 has an L-shaped cross section and three convex portions 12 are formed. It is a thing.
The trigger spray also has a connecting portion corresponding to such attachment means.

As shown in FIG. 9, if it is a trigger spray provided with such a connection part, even if it is any kind of trigger spray, the piston cylinder unit A can be incorporated and it will be generalized.
In such attachment means, there are cases where only the flange portion 11 is provided and the convex portion 12 is not 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 other modifications are possible without departing from the essence thereof. .

For example, the attachment means provided around the cylinder portion 1 is shown as an example having a flange portion and a convex portion, but is not necessarily limited thereto.
Moreover, although the example of the trigger spray is shown as an example in which the cylinder portion 1 is vertically arranged, it is natural that the trigger spray can be applied to a horizontally arranged one.
Moreover, it is naturally possible to change the structure of the cover body 7 in the trigger spray having the slider of the application example 2 as shown in FIG.
Of course, the material of the piston cylinder unit A is not limited to the above as long as the function can be achieved.

  The piston cylinder unit according to the present invention can be applied universally to different types of spray devices such as finger sprays, pump dispensers, and liquid ejecting devices in general because the main functional structure is modularized.

DESCRIPTION OF SYMBOLS 1 ... Cylinder part 11A ... Stepped cylinder part 11B ... Introducing tube 2 ... Nozzle piston structure 21 ... Nozzle part 22 ... Connection part 22A ... Fin 23 ... Piston part 23A ... Small diameter part 23B ... Pivoting part 23C ... Groove 23D ... Piston valve seat 3 ... stopper 4 ... trigger 4A ... slider 5 ... accumulation pressure applying valve 51 ... second valve 51A ... collar 53 ... second bubble cover
53A ... passage 53B ... blade spring 6 ... cap part 7 ... cover body A ... piston cylinder unit FV ... first valve N ... injection port P ... rotation fulcrum R ... storage part S ... return spring

Claims (8)

  A piston cylinder unit that is incorporated into a trigger spray that slides a piston part up and down by rotating a trigger to apply pressure to the liquid in the cylinder and sprays the liquid from the nozzle part to the outside. A piston-cylinder unit characterized by modularizing a nozzle piston structure having a coupling portion for coupling the two and a cylinder portion as a unit.   2. The piston cylinder unit according to claim 1, wherein a stopper for preventing the piston from slipping out (that is, for restricting an upper limit) is provided in the cylinder portion.   The piston cylinder unit according to claim 1, wherein an attachment means for attachment when incorporated in the trigger spray is provided on the outer periphery of the cylinder portion.   4. A piston cylinder unit according to claim 3, wherein the attaching means is a flange projecting to the outer periphery of the cylinder part.   The piston cylinder unit according to claim 1, wherein a pivot portion for connecting to the trigger is formed on an outer periphery of the cylinder portion.   2. The piston cylinder unit according to claim 1, wherein the trigger spray has a structure in which a rotation fulcrum of the trigger protrudes from the cap portion of the container.   The piston cylinder unit according to claim 1, wherein the trigger spray has a structure for rotating the trigger via a slider.   2. The piston cylinder unit according to claim 1, wherein a pressure accumulation function is provided by incorporating a pressure accumulation imparting valve in the piston portion.

Images