JP2011136710A - Nozzle head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle head that achieves uniform spraying while increasing a spraying area. <P>SOLUTION: The nozzle head 10 forms an annular groove 12 that annularly opens from the side 11f of the head 11. The leading end of a cylindrical portion defined by the inside-diameter-side internal circumferential face f<SB>1</SB>of the annular groove 12 is a small-diameter portion 13b. A plurality of long grooves G are formed in the large-diameter portion 13a of the cylindrical portion. A circumferential wall 16b extending backward from the rear face of a partition 16a is fitted in the annular groove 12, thereby forming a plurality of spin grooves 17. Thus, the liquid contents can be sprayed from the through-hole 16h by flowing from the long grooves G through the spin grooves 17. The long grooves G have upstream-side faces 14a extending so that the side faces of the long grooves have groove widths that are identical, and downstream-side faces 14b increasing the groove widths toward the small diameter portion 13b from the upstream-side face 14a. A bottom face connected to the downstream-side faces 14b is composed as a downstream-side bottom face 15b inclining in the circumferential direction of the cylindrical portion 13 as the groove width increases. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a nozzle head that is disposed above a container and sprays a content liquid.

  As the nozzle head, for example, an annular groove is opened on the side wall of the head arranged above the container, while the tip of the cylindrical portion formed on the inner peripheral surface of the annular groove is made small, and the tip is There is one in which a plurality of long grooves are formed on the outer peripheral surface of the cylindrical portion to be removed, and a nozzle tip is fitted into the annular groove (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 2-15796

  However, in the conventional nozzle head, a plurality of spin grooves that converge toward the through hole formed in the nozzle chip are formed between the head and the nozzle chip, so that the content liquid is sprayed in a mist form. Of the injection region, the injection amount is large in the portion close to the center, whereas the injection amount may be small in the outer edge portion, and there are cases where the injection region is narrow and uniform spraying cannot be performed.

  An object of the present invention is to provide a nozzle head that realizes uniform spraying while expanding an injection region.

The present invention has been made by paying attention to the positional relationship between the spin groove and the long groove around the cylindrical portion provided in the head in the conventional nozzle head, which is one of the reasons why the spray region is narrow and uniform spraying is not possible. Is,
An annular groove that opens annularly from the side surface is formed on the side surface of the head arranged above the container, and the tip of the cylindrical portion formed by the inner peripheral surface of the annular groove is made smaller, and the tip is A plurality of long grooves are formed on the outer peripheral surface of the cylindrical portion to be removed, and a peripheral wall extending rearward from the rear surface of the nozzle tip partition wall is fitted into the annular groove, whereby the rear surface side of the nozzle tip partition wall and the cylindrical portion are A plurality of spin grooves that converge from the annular step forming the tip of the cylindrical portion toward the through hole formed in the partition wall of the nozzle tip are formed between the tip side and the content liquid of the container from the long groove to the spin groove. A nozzle head that can be sprayed from the through-hole,
The long groove has an upstream side surface extending so that side surfaces of the long groove have equal groove widths, and a downstream side surface that expands the groove width from the upstream side surface toward the tip of the cylindrical portion, The bottom surface connected to the downstream side surface is configured as a downstream side bottom surface that is inclined toward the circumferential direction of the cylindrical portion as the groove width increases.

  According to the present invention, the downstream side surface can be configured as a flat surface, and can also be configured as a curved surface in which the expansion rate of the groove width increases toward the tip of the cylindrical portion.

  According to the present invention, the downstream bottom surface can be configured as a plane connected to the upstream bottom surface, two planes connecting the plane and the downstream side surface, and can also be configured as a curved surface.

  According to the present invention, since the groove width of the long groove increases from the upstream side to the downstream side, even if the long groove formed in the cylindrical portion of the head is not in a favorable positional relationship with the spin groove, the contents As the liquid expands along the downstream side surface, the circulation to the spin groove becomes good.

  In addition, according to the present invention, since the bottom surface on the downstream side of the long groove is inclined toward the circumferential direction of the cylindrical portion as the groove width increases, the content liquid introduced into the spin groove from the downstream side of the long groove is By flowing toward the through hole, the content liquid can be efficiently collected in the through hole at the confluence position of the spin groove.

  Thereby, according to the present invention, the difference between the injection amount at the portion near the center of the injection region and the injection amount at the outer edge portion is reduced, and the injection region itself is enlarged, so that the injection region is enlarged. Even spraying can be realized.

It is a principal part enlarged view which shows the state which mounted | wore the container pump with the nozzle head which is the 1st form of this invention typically in a partial cross section. (a), (b) is the principal part top view which shows typically the cylindrical part provided in the head which is a component of the same form from the upper side, and the principal part front view. It is a principal part perspective view which shows typically the cylindrical part provided in the head of the same form from the front end side. (a), (b) is the front view and rear view which show typically the nozzle tip which is a component of the same form, respectively. It is a principal part perspective view which shows the nozzle chip of the same form typically with a partial cross section from the back side. It is XX sectional drawing which shows notionally the flow-path structure of the same form from the front. It is a principal part enlarged view which shows the state which operated the same form and sprayed the content liquid typically with the state which operated the conventional nozzle head and sprayed the content liquid. It is a principal part enlarged view which shows the state with which the nozzle head which is the 2nd form of this invention was mounted | worn with the pump for containers typically with a partial cross section. (a), (b) is the principal part top view which shows typically the cylindrical part provided in the head of the same form from the upper side, and the principal part front view, respectively. It is YY sectional drawing which shows the flow path structure of the same form notionally from the front. It is a principal part enlarged view which shows the state which mounted | wore the container pump with the nozzle head which is the 3rd form of this invention typically in a partial cross section. It is XX sectional drawing which shows notionally the other flow-path structure based on a 1st form from the front.

  Hereinafter, a nozzle head according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, the code | symbol 10 is a nozzle head which is the 1st form of this invention. The nozzle head 10 is connected to an existing pump P having a stem S, and is attached to the mouth of a container (not shown) via a cover C to which the pump P is fixed. Further, as the pump P, for example, a plunger pump including a piston P ₁ slidably held inside the stem S and a plunger P ₂ slidably fitted inside the piston P ₁ can be cited. It is done.

Reference numeral 11 denotes a head in which an internal passage r _{1 in} which the upper end side of the stem S is internally fitted is formed. Thereby, the head 11 is arrange | positioned above a container. Further, the internal passage r ₁ leads to the internal passage r ₀ of the stem S, so that the content liquid from the pump P is pumped in response to the opening and closing of the plunger P ₂ .

As shown in FIG. 2, an annular groove 12 that opens in an annular shape from the side surface 11 f is formed on the side surface 11 f of the head 11. The annular groove 12 communicates with the internal passage r ₁ through the opening A.

The inner circumferential surface of the annular groove 12 forms a cylindrical portion 13 on the inner side. As shown in FIG. 3, the cylindrical portion 13 has a larger diameter on the downstream side by making the inner diameter side peripheral surface f ₂ downstream of the upstream inner diameter side peripheral surface f ₁ close to the opening A smaller. On the other hand, the tip is a small diameter portion 13b. Thus, an annular step surface f ₃ that forms the small diameter portion 13b is formed between the large diameter portion 13a and the small diameter portion 13b.

In addition, among the cylindrical portion 13, formed on an outer peripheral surface (radially inner side peripheral surface of the annular groove 12) f ₁ of the large diameter portion 13a, 3 one longitudinal groove G is from the upstream side to the downstream side closer to the opening A Has been.

In particular, the long groove G, as shown in FIG. 2 (a), an upstream side 14a that extends so as to groove width W ₁ its sides 14 are equal to the small diameter portion 13b from the upstream side surface 14a and a downstream side 14b to expand the groove width W ₂ toward, of the bottom surface 15 of the elongated groove G, the bottom surface 15b leading to the downstream side 14b is, the circumferential direction of the cylindrical portion 13 in accordance with expansion of the groove width W ₂ It is configured as a downstream bottom surface (hereinafter referred to as “downstream bottom surface 15 b”) inclined toward the bottom.

In this embodiment, the upstream side bottom surface 15a and the downstream side bottom surface 15b constitute the bottom groove 15 as the same plane, and the downstream side bottom surface 15b is a plane connected to the upstream side bottom surface 15a as shown in FIG. hereinafter, the "center-side bottom surface") 15b _1, this plane 15b ₁ and downstream side 14b and two planes connecting (hereinafter, which is configured as a "circumferential direction bottom") 15b _2.

4 and 5 has a partition wall 16a covering the inner diameter side of the annular groove 12, as shown in FIG. 1, and a peripheral wall 16b extending backward from the back surface of the partition wall 16a is integrally provided. Nozzle tip. As shown in FIG. 1, the peripheral wall 16 b of the nozzle tip 16 includes an outer peripheral surface f ₁ of the large-diameter portion 13 a (an inner peripheral surface of the annular groove 12) f ₁ and an outer peripheral side periphery of the annular groove 12. internally fitted between the surface f _4.

  Further, as shown in FIG. 5, three bulging portions 18 forming three spin grooves 17 converging toward the through holes 16h formed in the partition wall 16 are integrally provided on the back surface of the partition wall 16a. Thus, when the nozzle tip 16 is fitted into the annular groove 12, as shown in FIG. 6, it converges from the annular step 13s of the cylindrical portion 13 toward the through hole 16h between the tip end surface 13e of the cylindrical portion 13. Three spin grooves 17 are formed.

  Accordingly, when the nozzle head 10 is repeatedly pushed down and returned and the pump P is driven, the liquid in the container is sprayed from the long groove G through the spin groove 17 through the through hole 16h.

  According to this embodiment, since the groove width W of the long groove G increases from the upstream side toward the downstream side, the long groove G formed in the cylindrical portion 13 of the head 11 is, for example, as shown in FIG. Even when the long groove G is not in a favorable positional relationship with the spin groove 17 such that the content liquid pumped from the long groove G interferes with the raised portion 18 by overlapping with the raised portion 18 forming As indicated by an arrow Fl in the figure, the content liquid expands along the downstream side surface 14b, whereby the circulation to the spin groove 17 becomes good.

In addition, according to this embodiment, the long groove G on the downstream side bottom surface 15b, as shown in FIG. 1 or the like, for inclined toward the circumferential direction of the cylindrical portion 13 in accordance with expansion of the groove width W _2, downstream of the longitudinal groove G The content liquid introduced into the spin groove 17 from the side flows toward the through hole 16h of the nozzle chip 16 as shown by an arrow Fl in FIG. The content liquid can be collected efficiently.

  Thereby, according to the present embodiment, the difference between the injection amount near the center of the injection region and the injection amount at the outer edge portion is reduced, and the injection region itself is enlarged, so the injection region is enlarged. Even spraying can be realized.

  Here, in FIG. 8, the code | symbol 20 is a nozzle head which is the 2nd form of this invention. Hereinafter, parts that are considered to be substantially the same as the first embodiment will be described with the same reference numerals.

  In this embodiment, as shown in FIGS. 8 and 9, the bulging portion 18 is integrally provided on the end surface 13 e of the cylindrical portion 13. That is, in this embodiment, the bulging portion 18 that forms the spin groove 17 is provided on the head 11 side. In this case, since the bulging portion 18 is provided on the head 11 side together with the long groove G, the bulging portion 18 does not interfere with the long groove G as in the case where the bulging portion 18 is provided on the nozzle chip 16. There is no need to fix while positioning in the direction.

Further, the content liquid pumped from the long groove G is also distributed to the spin groove 17 by expanding the content liquid along the downstream side surface 14b as shown by the arrow Fl in FIG. As shown in FIG. 9, the downstream bottom surface 15b of the long groove G is inclined toward the circumferential direction of the cylindrical portion 13 as the groove width W ₂ is increased. As described above, by flowing toward the through hole 16 h of the nozzle chip 16, the content liquid can be efficiently collected in the through hole 16 h at the joining position of the spin groove 17.

  Therefore, in the present embodiment, by laying out the bulging portion 18 so as not to interfere with the long groove G, the effect of the present invention can be exhibited more effectively, and the assembling workability is also improved. Play. Further, according to the present embodiment, since it is not necessary to provide the bulging portion 18 on the back surface of the nozzle chip 16, the back surface of the nozzle chip 16 can be configured as a plane as shown by a two-dot chain line in FIG. Therefore, the nozzle tip 16 can be simplified.

  Furthermore, in FIG. 11, the code | symbol 30 is a nozzle head as a modification of a 2nd form. In this embodiment, the small-diameter portion 13b of the cylindrical portion 13 is provided as a member 13c separate from the head 11. About the other part, about the part made to be considered substantially the same as a 2nd form, it shows with the same code | symbol.

  FIG. 12 exemplifies a layout when the injection amount increases in the portion near the center while the injection amount in the outer edge portion decreases even when the injection region is relatively narrow.

  As shown in FIG. 12, when the long groove G is positioned at a position close to the spin groove 17, according to the conventional nozzle head, the jet region is a relatively narrow range (for example, the angle β = 25 degrees shown in FIG. 7). Thus, there is a problem that the injection amount is large in the portion close to the center, whereas the injection amount is small in the outer edge portion.

  On the other hand, according to each of the above-described embodiments, the injection amount at the portion close to the center of the injection region and the injection amount at the outer edge portion even when positioned in the layout as shown in FIG. While the difference becomes smaller, the injection region itself can be secured wider, for example, at an angle α = 40 to 60 degrees shown in FIG. According to the present invention, uniform spraying is possible regardless of the position of the long groove G.

The above description shows only one embodiment of the present invention, and various modifications can be made within the scope of the claims. For example, according to the present invention, it is possible to configure the downstream side 14b of the respective embodiments described above, curves to the magnification of the groove width W ₂ increases toward the small diameter portion 13b. Further, according to the present invention, the downstream side surface 15b can be configured as a curved surface.

  Further, the nozzle head according to the present invention is not limited to the member for inducing the pump operation as in the above-described embodiment, and can be applied as, for example, a nozzle head of an aerosol container, and its application range is Any means for pumping the content liquid to the nozzle head may be used. Moreover, each structure employ | adopted for each above-mentioned form can be combined with each other suitably.

  For example, the present invention can be applied to various discharges as long as the content liquid is sprayed by being placed above the container containing the liquid such as cosmetics such as perfumes and moisturizers and insect repellents. It can be applied to vessels.

10 Nozzle head (first form)
11 head 11f head side surface 12 annular groove 13 cylindrical portion 13a large diameter portion 13b small diameter portion 13e cylindrical portion end surface 13s step 14 long groove side surface 14a upstream side surface 14b downstream side surface 15 long groove bottom surface 15a upstream side bottom surface 15b downstream side bottom surface 15b ₁ center side Bottom surface 15b _Two circumferential direction bottom surface 16 Nozzle tip 16a Partition 16b Perimeter wall 16h Through hole (injection hole)
17 Spin groove 18 Raised portion 20 Nozzle head (second form)
30 Nozzle head (third form)
A Opening G Long groove P Pump P ₁ Piston P ₂ Plunger S Stem

Claims (1)

On the side wall of the head disposed above the container, an annular groove that annularly opens the outer peripheral surface of the side wall is formed, and the tip of the cylindrical portion formed on the inner diameter side peripheral surface of the annular groove is reduced in diameter, A plurality of long grooves are formed on the outer peripheral surface of the cylindrical portion excluding the tip, and a peripheral wall extending rearward from the partition wall of the nozzle chip is fitted into the annular groove, whereby the rear surface side of the partition wall of the nozzle chip and the cylinder are fitted. A plurality of spin grooves converging from an annular step forming the tip of the cylindrical part toward a through hole formed in the partition wall of the nozzle tip are formed between the tip of the part and the liquid in the container spins from the long groove. A nozzle head sprayable from the through hole through a groove,
The long groove has an upstream side surface extending so that side surfaces of the long groove have equal groove widths, and a downstream side surface that expands the groove width from the upstream side surface toward the tip of the cylindrical portion, A nozzle head, wherein a bottom surface connected to a downstream side surface is configured as a downstream bottom surface that inclines toward the circumferential direction of the cylindrical portion as the groove width increases.

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