JP6146987B2 - Accumulated syringe-type air mixture liquid ejector and cartridge used therefor - Google Patents

Description

  The present invention relates to a pressure-accumulating syringe type air-mixed liquid ejector capable of ejecting a content liquid in which air is mixed by pushing a piston into a cylinder to the outside.

  As a conventional pressure-accumulating syringe type ejector, a spray nozzle having a built-in valve is attached to a cylinder filled with a content liquid, and the content liquid can be sprayed by pushing out the content liquid with a piston (for example, , See Patent Document 1).

JP 2001-137344 A

  However, since the conventional pressure-accumulation syringe-type ejector is a device in which an operation tool operated by a user is filled with the content liquid, if the size of the cylinder is reduced for the purpose of spraying a small amount, the usability is deteriorated. For this reason, the conventional syringe-type ejector is not suitable for spraying a small amount of the content liquid. Moreover, the conventional pressure accumulation type syringe-type ejector merely pressurizes and ejects only the inner solution, and does not mix the content liquid with air.

  An object of the present invention is to provide a novel pressure-accumulating syringe-type air mixture liquid ejector that can take out a small amount of content liquid in a mixed state.

The pressure-accumulation syringe-type air mixture liquid ejector of the present invention includes an operation unit operated by a user, and an ejection unit from which a mixed liquid of air and content liquid is ejected,
The operation section includes an air-filled cylinder having a small-diameter tip cylinder portion and filled with air, an air push-out piston that pushes air filled in the air-fill cylinder into the tip cylinder portion, and a tip cylinder portion. And a rod member that protrudes from the tip tube portion by a pressing force received from the air extrusion piston while forming an annular gap
The ejection part includes an outer cylinder part that has an ejection port and is attached to the tip cylinder part, and an inner cylinder part that has an opening that leads to the ejection port and is arranged inside the outer cylinder part,
The inner cylinder part has a built-in liquid extrusion piston that pushes the content liquid filled inside toward the opening,
Between the inner cylinder part and the outer cylinder part, an annular elastic member in which a through-hole leading to the opening is formed is disposed, so that the liquid liquid pushed out from the opening is circulated to the ejection port. Is formed, and an air passage is formed in which the air pushed out from the annular gap is pushed open at the inner edge portion of the elastic member to join the through hole of the elastic member.

  In the present invention, the ejection part can be detachably attached to the operation part.

Moreover, in this invention, the said opening part is formed by tearing a tearing part from the said inner cylinder part .

  The pressure-accumulation syringe-type air mixture liquid ejector according to the present invention allows the user to push in the air extruding piston of the operating portion, and from the air-filling cylinder through a gap formed between the tip tube portion and the rod member. Filling air is pushed out to the ejection part. This air is introduced into an air passage formed between the inner cylinder part and the outer cylinder part of the ejection part. Here, the inner edge portion of the elastic member is not pushed open until the air pushed out from the operation portion reaches a certain pressure. For this reason, the air from an operation part is compressed between an elastic member and an air extrusion piston until the inner edge part of an elastic member is pushed open. When the inner edge portion is pushed open, the air from the operation portion is pushed at once into the through hole of the elastic member that forms the liquid path.

  On the other hand, when the user pushes in the air extruding piston of the operating portion, the rod member receiving the pushing force from the air extruding piston protrudes from the distal end cylindrical portion of the air filling cylinder. Next, the rod member protruding from the distal end cylindrical part pushes the content liquid together with the liquid extrusion piston built in the inner cylindrical part of the ejection part toward the through hole of the elastic member through the opening. As a result, the content liquid is mixed with the air through the through-hole and then pushed out from the jet outlet at once.

  As described above, in the present invention, after the air filled in the ejection portion is compressed to a certain pressure using the annular elastic member, it is released to the through hole of the elastic member at a stretch and pushed out from the liquid extrusion piston. By mixing with the content liquid, the content liquid can be stably ejected while maintaining a certain state.

  Moreover, in this invention, the operation part for mixing air with a content liquid and making it eject can be made into another structure by filling a content liquid in an ejection part. For this reason, it is possible to reduce the size of only the ejection portion filled with the content liquid without reducing the size of the operation portion. Therefore, the present invention is effective when it is desired to take out only a small amount of the content liquid mixed with air without impairing operability.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the syringe type bubble ejector which is one Embodiment of this invention in a partial cross section. (A) is sectional drawing which shows the outer cylinder part of the ejection part which concerns on the bubble ejector, (b) is sectional drawing which shows the inner cylinder part of the ejection part, (c) is the inside It is sectional drawing which shows the state which made the cylinder part cartridge. It is sectional drawing which shows the ejection part which concerns on the bubble ejector. It is an enlarged view of FIG. It is an expanded sectional view which shows the state which operated the same foam ejector and ejected the content liquid in foam shape.

  Hereinafter, with reference to drawings, a syringe type bubble ejector which is one embodiment of the present invention is explained in detail.

In FIG. 1, the code | symbol 1 is a syringe type bubble ejector (henceforth "bubble ejector") which is one Embodiment of this invention. The bubble ejector 1 includes an operation unit 10 operated by a user and an ejection unit 20 from which a content liquid _Mo including air (see FIG. 5) is ejected.

  Reference numeral 11 denotes an air-filled cylinder (hereinafter “cylinder”) filled with air. The cylinder 11 is integrally provided with a distal end cylindrical portion 11c having a diameter smaller than that of the body portion 11a via an annular shoulder portion 11b formed at one end of the hollow body portion 11a. An internal passage that leads to a space formed inside the trunk portion 11a is formed inside the distal end cylinder portion 11c. Further, the cylinder 11 is provided with a mounting cylinder part 11d surrounding the tip cylinder part 11c. Further, the cylinder 11 is provided with a finger hook portion 11e.

Reference numeral 12 denotes an air extrusion piston (hereinafter referred to as “first piston”). The first piston 12 forms an air filling space S ₁ between the first piston 12 and the cylinder 11. The first piston 12 is slidably held inside the body 11 a of the cylinder 11. Reference numeral 13 denotes a piston shaft to which the first piston 12 is fixed. The piston shaft 13 has a main body 13a to which the first piston 12 is fixed and a pressing portion 13b that receives a pressing force from a user. Thus, by pushing the piston shaft 13, it can be pushed out the air in the filling space S ₁ to the distal tube portion 11c.

Reference numeral 14 denotes a rod member disposed in the cylinder 11. The rod member 14 has a rod main body 14a disposed inside the distal end cylindrical portion 11c. Rod body 14a forms an annular gap r ₁ between the tip cylindrical portion 11c. The gap r ₁ forms an air introduction path (hereinafter referred to as “air introduction path r ₁ ”) for introducing the air pushed out by the first piston 12 into the ejection portion 20. The rod body 14a is integrally provided with a flange portion 14b that receives the first piston 12. Thereby, the rod main body 14a can be made to protrude from the front-end | tip cylinder part 11c with the pressing force received from the 1st piston 12. FIG. The flange portion 14b is a plate-like member such as a disk. Furthermore, a plurality of notches 14c are formed on the outer edge of the flange portion 14b at intervals around the central axis O (hereinafter referred to as “axis O”) of the foam ejector 1 (hereinafter referred to as “circumferential direction”). (In the figure, only one place is exemplarily displayed). Accordingly, the rod member 14 can be easily pushed out toward the distal end cylinder part 11c, and the air between the first piston 12 and the flange part 14b can also be pushed out to the distal end cylinder part 11c.

  The operation unit 10 is configured as an operating instrument as described above, while the ejection unit 20 is configured as an ejection nozzle. The ejection part 20 includes an outer cylinder part 21 and an inner cylinder part 22 arranged inside the outer cylinder part 21.

  The outer cylinder part 21 has the jet nozzle 1a in the front-end | tip part. An annular elastic member 23 is fixed on the inner side of the outer cylinder portion 21 adjacent to the jet port 1a (a position below the jet port 1a). As shown in FIG. 2A, the elastic member 23 has a through hole 23a and is formed of a material that can be deformed and restored. The elastic member 23 is fitted and held inside the outer cylinder portion 21. As shown in the drawing, a step 21a that circulates around the axis O and an annular convex portion 21b that circulates around the axis O are spaced from the step 21a in the direction of the axis O, as shown in FIG. Is provided. As a result, when the elastic member 23 is assembled inside the outer cylinder portion 21, the elastic member 23 is caught between the step 21a and the convex portion 21b of the outer cylinder portion and held so as not to be detached, as shown in FIG. .

  Further, as shown in FIG. 1, the rear end portion of the outer cylinder portion 21 is attached to the attachment cylinder portion 11d. The rear end portion forms a flange portion 21 f that is fixed to the cylinder 11. The flange portion 21f functions as a screw portion and is detachably screwed into a screw portion 11s formed on the inner side of the mounting cylinder portion 11d as shown in FIG. Thereby, the ejection part 20 can be attached to the operation part 10 by being screwed into the cylinder 11 as illustrated.

A sealing plug 24 is provided at the tip of the inner cylinder portion 22. As shown in FIG. 2B, the sealing plug 24 has a main body portion 24 a that is fixed inside the inner cylinder portion 22. The main body part 24 a is fixed in a sealed state with respect to the inner side of the inner cylinder part 22 by, for example, press-fitting and fitting inside the inner cylinder part 22. In addition, a recess 24b is formed inside the main body 24a so as to open at the rear end of the main body 24a and extend along the axis O. The recess 24b communicates with the outside through an opening A having a smaller diameter than the recess 24b. In this embodiment, as shown in FIG.2 (c), the main-body part 24a is previously provided with the trimmer part 24c integrally via the fracture line L. As shown in FIG. Thus, when the user grasps and twists the rigging portion 24c, the digging portion 24c is separated along the planned fracture line L, so that the main body portion 24a has an opening portion as shown in FIG. A is formed. As a result, as shown in FIG. 3, if the inner tube portion 22 is inserted inside the outer tube portion 21 and the sealing plug 24 is abutted against the elastic member 23, the space between the outer tube portion 21 and the inner tube portion 22 is reduced. Is formed with a liquid channel r ₂ that allows the opening A to communicate with the spout 1a.

On the other hand, a liquid extrusion piston (hereinafter referred to as “second piston”) 25 is disposed inside the inner cylindrical portion 22. The second piston 25 forms a filling space S ₂ for the content liquid (for example, nasal spray) M between the second piston 25 and the sealing plug 24. The second piston 25 is slidably held inside the inner cylinder portion 22. The rear end of the second piston 25 functions as a pressing portion that receives a pressing force from the tip of the rod body 14a. Thus, the second piston 25, by being pushed to the rod member 14, the content liquid M in filling space S _2, can be pushed out toward the opening A through the recess 24b.

In addition, an elastic member 23 is disposed between the outer cylinder portion 21 and the inner cylinder portion 22, so that a liquid path r ₂ that allows the content liquid M pushed out from the opening A to flow to the jet outlet 1 a is provided. Air passages r ₃ , r ₄ , r ₅ , and r ₆ are formed that allow the air pushed out from the air introduction passage r ₁ to open the inner edge portion 23b of the elastic member 23 and merge with the through hole 23a. ing.

In the present embodiment, as shown in FIG. 2B, the sealing plug 24 is provided with an annular protrusion 24d that circulates around the axis O on the outer surface of the main body 24a. The outer diameter of the projecting portion 24d is formed larger than the outer diameter of the inner cylinder portion 22 as shown in the figure. Furthermore, a plurality of grooves 24e are formed in the protrusion 24d at intervals in the circumferential direction. In addition, as shown in FIG. 2A, an annular convex portion 21 c that circulates around the axis O is provided on the inner side of the outer cylinder portion 21 with an interval in the direction of the axis O from the convex portion 21 b. Yes. Thereby, when the inner cylinder part 22 is assembled inside the outer cylinder part 21, as shown in FIG. 3, the protruding part 24d of the sealing plug is caught between the convex part 21b and the convex part 21c of the outer cylinder part. Retains retention. At the same time, air passages r ₄ , r _5, and r ₆ are formed between the outer tube portion 21 and the inner tube portion 22 together with the liquid passage r ₂ . In particular, in the present embodiment, since the provision of the annular protrusions 24d in the main body portion 24a, by the front end of the main body portion 24a is in contact with the elastic member 23, as shown in the figure, the air passage r ₆ is forming a space S ₃ of annularly around the body portion 24a. This space S ₃ functions as an air filling space sealed by the elastic member 23.

Further, as shown in FIG. 2B, the lower end portion of the inner cylinder portion 22 is also formed by an annular protrusion 22 b that circulates around the axis O. A plurality of grooves 22c are formed in the protrusion 22b at intervals in the circumferential direction. Each of the grooves 22c is notched from the lower end portion of the inner cylindrical portion 22 to the protruding portion 22b. In addition, as shown in FIG. 2A, a step 21 d that goes around the axis O is provided inside the outer cylinder portion 21. As a result, when the inner cylinder part 22 is assembled inside the outer cylinder part 21, the protrusion 22b is arranged between the tip cylinder part 11c of the cylinder 11 and the step 21d of the outer cylinder part as shown in FIG. The At the same time, an air passage r ₃ is formed between the outer cylinder portion 21 and the inner cylinder portion 22 as shown in FIG.

In the bubble ejector 1, the air formed between the tip cylinder portion 11 c and the rod main body 14 a from the cylinder 11 by the user pushing the piston shaft 13 of the operation unit 10 from the state shown in FIG. 1. The filling air is pushed out to the ejection part 20 through the introduction path r ₁ . This air is introduced into the air passages r _{3 to} r ₆ formed between the outer cylinder part 21 and the inner cylinder part 22 of the ejection part 20. Here, as shown in FIG. 4, the inner edge portion 23 b of the elastic member 23 is not pushed open until the air pushed out from the operation unit 10 reaches a certain pressure. Therefore, the air from the operating unit, to the inner edge portion 23b is pushed open, between the elastic member 23 and the first piston 12, i.e., is compressed in the filling space r _6. Inner edges 23b, while sealing the upper surface of the main body portion 24a of the sealing stopper by the elastic force of itself to the pressure in the filling space r _6, when the pressure in the filling space r ₆ exceeds the elastic force, the elastic force Pushed open against. When the inner edge portion 23b is pushed open, as shown in FIG. 5, the air from the operation unit 10 is pushed out into the through hole 23a of the elastic member forming the liquid path r ₂ at a stretch.

  On the other hand, when the user pushes the piston shaft 13 of the operation unit 10, the rod body 14 a that receives the pressing force from the first piston 12 protrudes from the distal end cylinder part 11 c. Next, the rod body 14 a protruding from the distal end cylindrical portion 11 c pushes the content liquid M toward the opening A together with the second piston 25 built in the inner cylindrical portion 22. Thereby, the content liquid M merges with the air at a stretch through the through hole 23a.

In the through-holes 23a, liquid content M extruded through the opening A is, after mixed with once extruded air from the air passage r _6, extruded at once to the spout 1a. As a result, the foam-like content liquid M ₀ containing air is ejected from the ejection port 1a in a stable state.

As described above, in the foam ejector 1 according to the present invention, after the air filled in the ejection portion 20 is compressed to a certain pressure through the annular elastic member 23, it is released to the through hole 23a at once, and the first by mixing the liquid contents M extruded from the second piston 25, the liquid content M ₀ of foam while maintaining a constant state can be ejected stably.

Moreover, in the foam ejector 1 according to this invention, the operation part 10 for mixing the content liquid M with air and making it eject can be made into another structure by filling the content liquid M in the ejection part 20. FIG. For this reason, only the ejection part 20 filled with the content liquid M can be reduced in size, without reducing the operation part 10 in size. Therefore, the foam ejector 1 according to the present invention is effective when it is desired to take out a small amount of the foam-like content liquid M ₀ mixed with air without impairing the operability.

  Further, the ejection portion 20 is configured separately from the operation portion 10, and an opening A is formed by tearing, as shown in FIG. 2C, in the sealing plug 24 disposed at a position facing the second piston 25. Since the trimmer 24c is provided, the cartridge can be replaced as shown in FIG. As described above, the cartridge can be attached to the operation unit 10 by simply inserting the cartridge into the outer tube portion 22 after removing the trimmer portion 24c.

  In the present embodiment, as shown in FIG. 3 and the like, the dimension in the direction of the axis O between the step 21a provided on the outer cylinder portion 21 and the convex portion 21b is between the protrusion 24d of the sealing plug 24. Is set to form a gap. That is, in the present embodiment, the dimension between the step 21a and the convex portion 21b is set so that the protruding portion 24d can play along the axis O. In addition, in this embodiment, when the ejection part 20 is screwed into the operation part 10, the distal end cylinder part 11 c of the mounting part 10 can be brought into contact with the lower end part of the inner cylinder part 22 as shown in FIG. 4. . That is, in this embodiment, the inner cylinder part 22 can be moved along the axis O inside the outer cylinder part 21 by screwing the ejection part 20. Thereby, when mounting the ejection part 20, the sealing plug 24 can be brought into contact with the elastic member 23 by screwing the ejection part 20. In this way, if the sealing plug 24 (inner cylinder part 22) is configured so that the inner cylinder part 22 can be brought into contact with the elastic member 23, the elastic member 23 is combined with the vertical dimension variation during assembly by the elastic force. To eliminate.

  In the present embodiment, as shown in FIG. 1, the rod body 14a contacts the second piston 25 in the initial state before use for the purpose of pre-compressing air prior to the extrusion of the content liquid M. However, according to the present invention, the rod body 14a can be brought into contact with the second piston 25 in advance. In the present embodiment, the opening A of the inner cylindrical portion 22 is formed by a separate sealing plug 24. However, according to the present invention, the inner cylindrical portion 22 and the sealing plug 24 are integrally formed to seal the opening. It is also possible to omit the plug 24.

  The above description only shows 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, the ejection unit 20 can be configured not to be removable from the operation unit 10. Furthermore, a mesh ring or the like can be incorporated in the ejection part 20.

  The present invention can be applied to various devices as long as it is an ejector intended to eject the content liquid mixed with air. Also, the type of content liquid is not limited.

DESCRIPTION OF SYMBOLS 1 Syringe type foam ejector 1a Spout 10 Operation part 11 Cylinder 11a Body part 11b Shoulder part 11c Tip cylinder part 11d Installation cylinder part 11e Finger hook part 11s Screw part 12 1st piston 13 Piston shaft 13a Main body 13b Press part 14 Rod member 14a Rod body 14b Flange part 20 Ejection part 21 Outer cylinder part 21a Step 21b Projection part 21c Projection part 21d Step part 21f Flange part 22 Inner cylinder part 22b Annular projection part 22c Groove 23 Elastic member 23a Through hole 23b Inner edge part 24 Seal plug 24a Main body Portion 24b Recessed portion 24c Grinding portion 24d Annular projection 24e Groove 25 Second piston A Opening portion M Content liquid _Mo Foam content liquid r ₁ Air introduction path (annular gap)
r ₂ liquid path r ₃ air path r ₄ air path r ₅ air path r ₆ air path (filling space)
S ₁ filling space (air)
S ₂ filling space (content liquid)
S ₃ filling space (content liquid)

Claims (3)

An operation unit operated by a user, and an ejection unit from which a mixed liquid of air and content liquid is ejected,
The operation section includes an air-filled cylinder having a small-diameter tip cylinder portion and filled with air, an air push-out piston that pushes air filled in the air-fill cylinder into the tip cylinder portion, and a tip cylinder portion. And a rod member that protrudes from the tip tube portion by a pressing force received from the air extrusion piston while forming an annular gap
The ejection part includes an outer cylinder part that has an ejection port and is attached to the tip cylinder part, and an inner cylinder part that has an opening that leads to the ejection port and is arranged inside the outer cylinder part,
The inner cylinder part has a built-in liquid extrusion piston that pushes the content liquid filled inside toward the opening,
Between the inner cylinder part and the outer cylinder part, an annular elastic member in which a through-hole leading to the opening is formed is disposed, so that the liquid liquid pushed out from the opening is circulated to the ejection port. Is formed, and an air passage is formed in which air pushed out from the annular gap is joined to the through hole of the elastic member by pushing open the inner edge portion of the elastic member. vessel.   The pressure-accumulation syringe type air-mixed liquid ejector according to claim 1, wherein the ejection portion is detachably attached to the operation portion. The pressure-accumulating syringe type air-mixed liquid ejector according to claim 2, wherein the opening is formed by tearing a slit portion from the inner cylinder portion .

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