JP5829009B2 - Spray nozzle - Google Patents

Description

  The present invention relates to a spray nozzle that injects a liquid content above a container from a merging portion of a plurality of spin flow channels formed between a main body and a partition through a through hole formed in the partition. .

  As a conventional spray nozzle, for example, it has an internal passage through which a liquid content from a container is introduced, an annular groove communicating with the internal passage opens from the side surface, and a cylindrical portion is provided inside the annular groove. Formed between the main body and the partition wall covering the end face of the cylindrical portion, having a peripheral wall fitted to the outer peripheral surface of the cylindrical portion provided in the main body, and passing between the peripheral wall and the peripheral portion. In some cases, the mist is ejected in a mist form through a through-hole formed in the partition wall from a merging space serving as a merging portion of the plurality of spin channels (for example, see Patent Document 1).

Japanese Utility Model Publication No. 2-15796

  However, such a spray nozzle can be suitably sprayed when the content liquid is pumped at a constant pressure using a propellant such as gas, as in the aerosol type, while the pump type, When the content liquid is intermittently pumped using a piston or the like that is operated by manual operation, if the spray particles become coarse, the sprayed object tends to be liquefied and dripping.

  An object of the present invention is to provide a novel spray nozzle capable of realizing injection with fine spray particles regardless of the pressure feeding means.

The present invention has an internal passage into which the content liquid from the container is introduced, an annular groove communicating with the internal passage is opened from a side surface, and a main body provided with a cylindrical portion in an inner region of the annular groove;
A peripheral wall fitted to the outer peripheral surface of the cylindrical portion provided in the main body, and a plurality of liquids formed between the peripheral wall and the partition wall covering the end surface of the cylindrical portion are passed between the peripheral wall and the cylindrical portion. A nozzle tip that sprays in the form of a mist through a through-hole formed in the partition wall from a confluence space serving as a confluence portion of a spin channel,
The merge space is formed by a merge recess formed on the end surface of the cylindrical portion and a back recess formed on the inner surface of the partition wall of the nozzle tip,
Forming an axial flow path extending along the cylindrical portion between the peripheral wall and the cylindrical portion, and communicating the axial flow path with the plurality of spin flow paths via the annular flow path;
The diameter Da of the through hole is set to a diameter Dc that forms the outer edge shape of the merge space.
0.10 × Dc ≦ Da <0.20 × Dc
It is characterized by being configured to satisfy the following conditions.

According to the present invention, the spin channel can be formed by a recess formed in the end surface of the cylindrical portion.

According to the present invention, the spin channel can be formed by a recess formed in the inner surface of the partition wall.

According to the present invention, the diameter Da of the through hole is set to the diameter Dc that forms the outer edge shape of the merge space.
0.10 × Dc ≦ Da <0.20 × Dc
By satisfying the above condition, spraying with fine particles is possible not only when the content liquid is pumped at a constant pressure but also when the content liquid is intermittently pumped. Thereby, according to this invention, the content liquid injected in the shape of a mist does not dripping. In addition, according to the present invention, since the spray particles become fine, for example, there is an effect that the touch and the skin feel are improved when the lotion is sprayed as the content liquid.

  According to the present invention, if the spin channel and the confluence space are formed by the recess formed in the end surface of the cylindrical portion, a suitable spray state can be realized, for example, only by replacing the nozzle tip having a partition wall. can do.

  According to the present invention, the spin channel and the merge space can be formed by the recess formed on the inner surface of the partition wall.

It is a 1st form of this invention, and is a side view which shows typically the state with which the spray nozzle was mounted | worn with the container pump. It is a principal part enlarged view of FIG. (a), (b) is a main part front view schematically showing an annular groove formed in the spray head according to the present embodiment, and a main part front showing a state in which a nozzle tip is mounted in the annular groove by a one-dot chain line FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  In FIG. 1, 1 is a spray head which is one form of this invention. The spray head 1 is connected to an existing pump P including a stem S, and is attached to a mouth portion of a container (not shown) via a cover C to which the pump P is fixed. As the pump P, for example, a plunger-type pump including a piston slidably held inside the stem S and a plunger Pp slidably fitted inside the piston S can be mentioned.

Reference numeral 2 denotes an operation head as a main body in which an internal passage r ₁ into which the upper end side of the stem S is fitted is formed. The operation head 2 is disposed above the pump P (container) via the stem S. Further, the internal passage r ₁ leads to the internal passage r ₀ of the stem S, so that the internal solution from the pump P is pumped in accordance with the opening and closing of the plunger Pp described above.

An annular groove 4 that is annularly opened from the side surface 3f is formed in the side wall 3 of the operation head 2. The annular groove 4 communicates with the internal passage r ₁ through the opening A. The inner circumferential side surface of the annular groove 4 forms a cylindrical portion 5 in its inner region.

Cylindrical portion 5 than the inner diameter side peripheral surface f ₁ on the upstream side close to the opening A by the inner diameter side circumferential surface f ₂ of the downstream side with a small diameter, across the annular step f _3, the large diameter portion 5a And a small diameter portion 5b. As shown in FIG. 2, the annular step f ₃ is inclined toward the central axis Ox of the cylindrical portion 5 toward the small-diameter portion 5 b on the downstream side, so that the outer peripheral surface of the large-diameter portion 5 a (the annular groove 4 the inner diameter side peripheral surface) f ₁ is formed so as to taper toward the small diameter portion 5b on the downstream side.

In addition, on the outer peripheral surface f ₁ of the large diameter portion 5a, as shown in FIG. 3, three long grooves 5c cut out an annular step f ₃ from the upstream side close to the opening A toward the downstream side. Further, they are formed at intervals in the circumferential direction.

  As shown in FIG. 2, 6 has a partition wall 6a covering the end surface 5e of the cylindrical portion 5 (small diameter portion 5b), and a peripheral wall 6b extending rearward from the inner surface (back surface) of the partition wall 6a is integrally formed. This is a nozzle tip provided.

As shown in FIG. 2, the nozzle chip 6 has its peripheral wall 6 b internally fitted into the outer peripheral surface f 1 of the large-diameter portion 5 a of the annular groove 4, and the outer peripheral surface f 4 of the annular groove 4. It is attached to the operation head 2 by being externally fitted. Thus, when the nozzle tip 6 is fitted in the annular groove 4, as shown in FIG. 2, three internal passages (hereinafter referred to as "axial flow paths") extending along the cylindrical portion (large diameter portion 5a) 5 are formed. ) R2 is formed around the central axis Ox at intervals.

Further, as shown in FIG. 3A, the cylindrical portion 5 of the operation head 2 has three spin grooves 7 extending toward the central axis Ox on the end surface 5e of the small diameter portion 5b. Are formed at intervals. Further, in the region including the central axis Ox in the end face 5e of the small diameter portion 5b, a confluence recess 8 serving as a confluence portion of the three spin grooves 7 is formed as shown in FIG. As shown in the figure, the confluence recess 8 has a circular shape formed by an annular outer edge 8e having a diameter Dc and surrounding the central axis Ox.

Thus, as shown in dashed line in FIG. 3 (b), the nozzle tip 6 when fitted into the annular groove 4, between the annular step f ₃ which connects the large-diameter portion 5a and the small diameter portion 5b, An annular internal passage (hereinafter referred to as “annular flow path”) r ₃ is formed, and between the end surface 5 e of the small diameter portion 5 b and the spin groove 7, an axis line is formed via the annular flow path r _3. A spiral internal passage (hereinafter referred to as “spin flow path”) r ₄ that leads to the flow path r ₂ is formed, and further, the three spin flow paths r ₄ are communicated with the through hole 6 c between the merge recess 8. A circular merge space (hereinafter, “merging chamber”) r ₅ is formed.

Incidentally, according to this embodiment, the nozzle tip 6 is the back of the partition wall 6a (inner surface), since the rear recess 6d leading to the outside through the through hole 6c is formed, according to the present embodiment, the merging chamber r ₅ is operated The junction recess 8 is formed on the end surface 5 e of the head 2 and the back recess 6 d is formed on the partition wall 6 a of the nozzle chip 6. However, according to the present invention, the back recess 6d formed in the partition wall 6a has an arbitrary configuration.

Further, as shown in FIG. 3B, the spin channel r ₄ is configured such that the groove width W ₁ on the through hole 6c side is smaller than the groove width W ₂ on the annular channel r ₃ side. For example, in this embodiment, as shown in FIG. 3 (a), an outer peripheral side wall 7a extending outwardly along the tangent line of the outer edge 8e in the confluence recess 8 (merging space r ₄ ), and the outer peripheral side wall 7a. A region partitioned by the inner peripheral side wall 7 b extending outward with a large inclination angle is configured as the spin groove 7. Thus, as shown in FIG. 3B, the spin channel r ₄ is configured such that the channel area S ₁ on the through hole 6c side is smaller than the channel area S ₂ on the annular channel r ₃ side. .

In this embodiment, the diameter of the through-hole 6c formed in the nozzle tip 6 (hereinafter referred to as “jet hole diameter”) Da is set to the diameter of the confluence recess 8 (merging chamber r5) of the spray head 2 (hereinafter referred to as “merging chamber diameter”). set in the range of less than 10-20% with respect to D c.

According to this embodiment, as described above, the nozzle hole diameter Da is set to the merging chamber diameter Dc.
0.10 × Dc ≦ Da <0.20 × Dc
By satisfying the above condition, spraying with fine particles is possible not only when the content liquid is pumped at a constant pressure but also when the content liquid is intermittently pumped. Thereby, according to this form, the content liquid sprayed in the shape of a mist does not dripping. Moreover, according to this form, since spray particle becomes fine, there exists an effect that the touch and skin paste when spraying lotion as a content liquid improve, for example.

  On the other hand, Table 1 below uses a 10% aqueous solution of alcohol as the content liquid, the joining chamber diameter Dc is 1 (mm), and the nozzle hole diameter Da is changed to be 150 (mm) away from the through hole 6c. The average measured value calculated using the Sauter average particle diameter (SMD) (μm) obtained by spraying five times at the position and obtained from the measured value is shown.

Furthermore, the following equation (1) is
It is an approximate expression calculated based on the average measured value.
y = 599.5x ³ −4866.7x ² + 1305.6x−33.631 (1)
In the approximation formula (1), x is an injection hole diameter D a, y is the Sauter mean particle diameter determined from the injection hole diameter D a (SMD) Theoretical value ([mu] m) (approximate value).

  For example, spray particles for hand sprays, especially spray particles when spraying lotion on the face, etc., are easily wet when the spray particles become coarse, and the feeling of use when the mist hits the face is not bad. Therefore, the average particle diameter is ideally 80 to 100 (μm), preferably less than 80 (μm), and more preferably less than 70 (μm).

In contrast, referring to average measurements and approximation of Table 1, it is set in a range of less than 10-20% of the injection hole diameter Da respect merging chamber diameter D c, the average particle diameter of 80 ([mu] m ) below, further, by setting to less than 14% of the nozzle hole diameter Da respect merging chamber diameter D c, it is clear that the more preferable an average particle diameter is less than 70 ([mu] m).

If the spin channel r ₄ and the merge space r ₅ are formed by the merge recess 8 formed in the end surface 5e of the cylindrical portion 5 as in the present embodiment, a suitable spray state can be obtained, for example, by a partition wall. This can be realized only by replacing the nozzle tip 6 having 6a.

Furthermore, according to the present invention, the spin channel r ₄ and the merge space r ₅ can be formed by the recesses formed on the inner surface of the partition wall 6.

  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, the spray nozzle according to the present invention is not limited to a member for inducing a pump operation as in the above-described form, and can be applied as, for example, a spray nozzle for an aerosol container. Any means for pumping the content liquid to the spray nozzle may be used.

  In addition to the cosmetics such as perfume and moisturizing agent as described above, the present invention ejects the content liquid by being disposed above the container containing the chemical such as an insect repellent, etc. If so, the present invention can be applied to various ejectors.

DESCRIPTION OF SYMBOLS 1 Spray nozzle 2 Operation head 3 Operation head side wall 3f Operation head side surface 4 Annular groove 5 Cylindrical part 5c Long groove 5e End face of cylindrical part 6 Nozzle tip 6a Partition wall 6b Perimeter wall 6c Injection hole (through hole)
7 Spin groove 8 Merge recess 8e Merge recess outer edge C Pump cover r ₁ Internal flow path (introduction path)
r ₂ internal flow path (axis channel)
r ₃ Internal channel (annular channel)
r ₄ internal channel (spin channel)
r ₅ junction chamber P pump S stem

Claims (3)

A main body having an internal passage into which the liquid content from the container is introduced, an annular groove communicating with the internal passage opening from a side surface, and a cylindrical portion provided in an inner region of the annular groove;
A peripheral wall fitted to the outer peripheral surface of the cylindrical portion provided in the main body, and a plurality of liquids formed between the peripheral wall and the partition wall covering the end surface of the cylindrical portion are passed between the peripheral wall and the cylindrical portion. A nozzle tip that sprays in the form of a mist through a through-hole formed in the partition wall from a confluence space serving as a confluence portion of a spin channel,
The merge space is formed by a merge recess formed on the end surface of the cylindrical portion and a back recess formed on the inner surface of the partition wall of the nozzle tip,
Forming an axial flow path extending along the cylindrical portion between the peripheral wall and the cylindrical portion, and communicating the axial flow path with the plurality of spin flow paths via the annular flow path;
The diameter Da of the through hole is set to a diameter Dc that forms the outer edge shape of the merge space.
0.10 × Dc ≦ Da <0.20 × Dc
A spray nozzle that is configured to satisfy the following condition. The spray nozzle according to claim 1, wherein the spin channel is formed by a recess formed in an end surface of the cylindrical portion. 2. The spray nozzle according to claim 1, wherein the spin channel is formed by a recess formed on an inner surface of the partition wall.

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