JP5840441B2 - Air mixing jet - Google Patents

Description

  The present invention relates to an air mixing type ejector capable of ejecting a content liquid obtained by pushing a piston into a syringe and mixing air to the outside.

  As a conventional air mixing type ejector, a spray nozzle is attached to the tip of a syringe so that when the piston is pushed in, the content liquid can be sprayed by mixing the air with the content liquid of the syringe. (For example, refer to Patent Document 1).

JP 2001-137344 A

  However, the conventional air mixing type ejector fills a syringe as an operation instrument with the content liquid, and mists the content liquid pushed out by the piston in the syringe through a spray nozzle attached to the tip of the syringe. Is. For this reason, if the syringe is downsized for the purpose of spraying a small amount, the usability deteriorates, so that it is not suitable for spraying a small amount of the content liquid.

  An object of the present invention is to provide a novel air mixing type ejector that can take out a small amount of content liquid in a mixed state with air.

The air mixing type ejector of the present invention has a first syringe in which a cylindrical body portion having a smaller diameter than the body portion is provided at one end of a hollow body portion, and a first piston that pumps air in the first syringe. The piston shaft that pushes the air into the internal passage formed inside the cylindrical body portion, and the air that is disposed in the internal passage of the cylindrical body portion and is pushed out by the first piston between the cylindrical body portion. A rod member having a shaft portion that forms a passage and receiving a first piston together with the shaft portion, and a pressing portion that projects the shaft portion from the internal passage, and a pressing force from the rod member can be moved as an urging force A second syringe having an air passage formed inside for mixing the air pushed out by the first piston with the content liquid in the filling space formed between the second piston and the second piston , 2nd piston The air pushed by the rod member moves from the position where the filling space is cut off from the internal passage of the cylindrical body part to the position where the air flow path is formed, so that the air pressure-fed from the first syringe passes through the air flow path. a it shall be supplied to the filling space through.

  If an air flow path distribute | circulates the air extruded by the 2nd piston moving to the filling space of the content liquid formed between the said 2nd piston and the 2nd syringe through the 2nd piston. Good. For this reason, the air flow path can be formed entirely or locally in the axial direction. Similarly, even if it is formed all around the axis, it can be formed at one place in the circumferential direction or at a plurality of places at intervals in the circumferential direction. As an air flow path, it can be set as the groove part formed in the internal peripheral surface of a 2nd syringe, for example.

Preferably, at least one of the second piston and the second syringe is provided with a locking means for locking the second piston to the second syringe. In addition, it is preferable that at least one of the rod member and the first syringe is provided with a retaining means for preventing the shaft portion of the rod member from entering the first syringe.

  In the present invention, the second piston and the second syringe can be detachably attached to the first syringe. Moreover, in this invention, a 2nd syringe can also be provided so that it cannot be removed with respect to a 1st syringe.

  In the present invention, when the piston shaft is pushed in and the first piston in the first syringe is operated, the first piston compresses the air in the first syringe. Next, by pushing the shaft portion of the rod member to the second syringe, the second piston in the second syringe is moved, and this compressed air is a passage formed between the cylindrical portion and the rod member. To the content liquid in the filling space formed between the second syringe and the second piston through the air flow path formed in the second syringe. Therefore, according to the present invention, the content liquid mixed with air can be taken out in a volume corresponding to the second syringe by a simple operation of simply pushing the piston shaft.

  Further, since the second piston is operated by the rod member pushed out by the first piston, the second syringe and the second piston can be adopted as a mechanism for filling and pumping the content liquid, and the second piston. As a mechanism for driving the first syringe and the first piston can be employed. In this case, only the mechanism for filling and pumping the content liquid, that is, only the second syringe and the second piston can be reduced without downsizing the mechanism for driving the second piston. 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.

It is an exploded view which shows the state which decomposed | disassembled the cartridge type spray syringe which is the 1st form of this invention into the cartridge and the operating instrument in a partial cross section. It is sectional drawing which expands and partially shows the part which assembled | attached the cartridge and operating tool based on the form. It is a partial cross section figure which shows the state immediately after removing the sealing stopper and pushing in the piston shaft which concerns on the same form. It is a partial cross section figure which shows the state immediately before the operation | movement of a 2nd piston is started by pushing in the piston shaft which concerns on the same form. It is a partial cross section figure which shows the state which operates a 2nd piston by pushing in the piston shaft which concerns on the same form, and sprays a content liquid. It is a partially expanded sectional view of FIG. It is a partially expanded sectional view which shows the state which sprays the content liquid by operating a 2nd piston by pushing in the piston shaft which concerns on the same form further. (a) is a perspective view which shows the 2nd piston which concerns on the form with an O-ring, (b) is the O-ring of the state pushed in in the 2nd syringe, when assembling a 2nd piston to a 2nd syringe It is a perspective view which shows the state of this with a 1st piston.

  Hereinafter, with reference to drawings, the air mixing type ejector which is this invention is demonstrated in detail.

  FIG. 1 shows a cartridge-type spray syringe I, which is an embodiment of the present invention, used for spraying nasal drops, in a state where it is disassembled into a cartridge A and an operation instrument B.

  Reference numeral 1 denotes a first syringe. The first syringe 1 is integrally provided with a cylindrical body portion 1c having a diameter smaller than that of the body portion 1a via an annular shoulder portion 1b formed at one end of the hollow body portion 1a. An internal passage r leading to a space formed inside the trunk portion 1a is formed inside the cylindrical body portion 1c. Further, the first syringe 1 is provided with a finger hook 1d.

  Reference numeral 2 denotes a first piston. The first piston 2 is slidably held inside the body portion 1 a of the first syringe 1, thereby pumping the air in the first syringe 1. Reference numeral 3 denotes a piston shaft. The first piston 2 is fixed to the piston shaft 3. Thereby, the 1st piston 2 can push out the air in the 1st syringe 1 to the internal channel | path r of the cylinder part 1c by pressing the flange 3f provided in the piston shaft 3. FIG.

  Reference numeral 4 denotes a rod member disposed in the first syringe 1. As shown in FIG. 2, the rod member 4 has a shaft portion 4a disposed in the internal passage r, and forms an annular gap (passage) r1 between the rod member 4 and the cylindrical portion 1c. Thus, the rod member 4 forms an annular passage (hereinafter referred to as “annular passage”) r1 through which the air pushed out by the first piston 2 passes between the rod member 4 and the cylindrical portion 1c.

  The rod member 4 is integrally provided with a pressing portion 4b that receives the first piston 2 together with the shaft portion 4a and projects the shaft portion 4a from the internal passage r. The pressing portion 4b is a plate-like member such as a disc so that a large contact area with the first piston 2 can be secured. The pressing part 4b also functions as a means for preventing the first syringe 1 from coming off.

  Reference numeral m <b> 1 is a retaining means for preventing the shaft portion 4 a from entering the first syringe 1. The retaining means m1 has, for example, an annular convex portion 4c provided on the outer peripheral surface of the shaft portion 4a around the axis O and an inner peripheral surface of the cylindrical portion 1c with a space around the axis O. It has the some convex part 1p provided by placing, and it catches each other and prevents that the shaft part 4a enters into the 1st syringe 1. FIG. The retaining means m1 can be provided on at least one of the rod member 4 and the first syringe 1.

  Further, as shown in the figure, the annular passage r1 has a height (thickness) of the annular convex portion 4c lower (thinner) than that of the convex portion 1p, thereby ensuring a gap between the annular passage r1 and the cylindrical body portion 1c. An annular passage r1 as an air passage is secured together with gaps formed between the plurality of convex portions 1p.

  The operation instrument B is configured as described above, while the cartridge A is configured as follows.

  Reference numeral 5 denotes a second syringe that is filled with the content liquid. The second syringe 5 has a flange portion 5 a that is fixed to the first syringe 1. The first syringe 1 is provided with a distal outer cylinder 1e that surrounds the cylindrical portion 1c. The flange portion 5a functions as a screw portion, and is detachably screwed into a screw portion 1s formed inside the outer end cylinder 1e. Thereby, the 2nd syringe 5 can be made to mount | wear with the cartridge A with respect to the operation instrument B by screwing together with the 1st syringe 1 like illustration.

  Reference numeral 6 denotes a second piston that is slidably disposed in the second syringe 5. As shown in FIG. 8, the second piston 6 has an annular recess 6a that goes around the axis O6. The annular recess 6a partitions the body of the second piston 6 into an upper body 6b and a lower body 6c. An annular seal member 7 such as an O-ring is retained in the annular recess 6a.

  As shown in FIG. 1, the second piston 6 forms a space (filling space) S for filling the content liquid with the second syringe 5. In the initial state in which the piston shaft 3 is not pushed into the filling space S, and further in the initial stage state in which the piston shaft 3 is pushed in (the initial pushing stage), as shown in FIG. The space between the inner peripheral surface and the inner peripheral surface is sealed off from the internal passage r (annular passage r1). Further, the second piston 6 remains stationary due to the sliding resistance generated between the seal member 7 and the inner peripheral surface of the second syringe 5 until a certain pressure (biasing force) is applied.

On the other hand, when the piston shaft 3 is pushed in, the first piston 2 slides toward the cylindrical portion 1c while pushing out the air in the first syringe 1 to the annular passage r1, as shown in FIG. At this time, the air pushed through the annular passage r1 is applied to the second piston 6 as an urging force.

  However, since the urging force applied to the second piston 6 is resisted by the sliding resistance between the seal member 7 and the second syringe 5 as described above, the second piston 6 is air pushed out through the annular passage r1. Will not be pushed out. As a result, the air pushed out through the annular passage r1 loses its escape and becomes compressed.

  On the other hand, when the piston shaft 3 is further pushed in, as shown in FIG. 4, the first piston 2 comes into contact with the pressing portion 4b of the rod member 4, and as shown in FIG. 5, the shaft together with the pressing portion 4b. Extrude part 4a. Thereby, the 2nd piston 6 moves toward the jet outlet 5c by making the pressing force from this shaft part 4a into urging | biasing force by contacting with the shaft part 4a extruded through the internal channel | path r.

  In this embodiment, as shown in FIG. 2, a locking means m2 for locking the second piston 6 is provided on the second syringe 5 in order to more firmly restrict the movement of the second piston 6. The locking means m2 is provided with, for example, a convex portion 5p on the inner peripheral side of the second syringe 5, and the second piston 6 is attached to the second syringe 5 by hooking and locking the seal member 7 on the convex portion 5p. On the other hand, fix it so that it is more difficult to move. This locking can be variously set as long as it can be released by the pressing force from the rod member 4. As a result, the second piston 6 becomes more difficult to be pushed out by the air from the annular passage r1, so that the air pushed through the annular passage r1 can be further compressed. The locking means m2 can be provided on at least one of the second syringe 5 and the second piston 6.

  Here, the outer diameter of the lower body 6 c of the second piston 6 is set smaller than the inner diameter of the second syringe 5. For this reason, as shown in FIG. 6, the lower body portion 6 c of the second piston 6 forms an annular gap C with respect to the inner peripheral surface of the second syringe 5.

  Further, an air flow path r2 is formed inside the second syringe 5. The air flow path r2 circulates the compressed air between the first piston 2 and the second piston 6. The compressed air is pumped to the content liquid filling space S through the air flow path r2. For this reason, the air flow path r2 has a reduced diameter (inclined) with respect to the inner peripheral surface of the second syringe 5 as a whole, for example, the inner peripheral surface of the second syringe 5 shown in FIG. It may be formed so as to include a portion to be formed, or may be formed at a local position in the whole along the axis O direction. Similarly, even if it is formed all around the axis O, it can be formed at one place in the circumferential direction or at a plurality of places at intervals in the circumferential direction. In this embodiment, a plurality of grooves 5b extending along the axis O are formed as the air flow path r2.

The second piston 6 initially, as shown in FIG. 2, where between the clearance C and the groove 5 b is blocked by the sealing member 7, when the first piston 2 is pushed, as shown in FIG. 6, by contact with the rod member 4 jumped out from the internal passage r moves toward the spout 5 c. By this movement, as shown in the figure, when the seal member 7 is positioned on the groove 5b, the compressed air between the first piston 2 and the second piston 6 enters the filling space S from the gap C through the groove 5b. By being pushed out, it is mixed with the content liquid in the filling space S. Thus, the content liquid filled in the filling space S, it becomes the state of being mixed with the compressed air pushed out by the first piston 2, once the spout 5 c toward the outside world, be ejected in a mist form Can do.

  In addition, since the movement of the second piston 6 is restricted by the sliding resistance between the seal member 7 and the second syringe 5, the second piston 6 cannot move beyond the pushing amount of the rod member 4, but according to the present invention. For example, the second piston 6 can be further pushed out by extending the shaft portion 4a. When the second piston 6 is further pushed out and its lower body portion 6c passes through the groove portion 5b as shown in FIG. 7, the compressed air pushed out from the first piston 2 through the annular passage r1 becomes the groove portion 5b. Only through the filling space S.

  The second piston 6 is prevented from coming off from the second syringe 5 by an annular member 8 fixed inside the second syringe 5. Further, as shown in FIG. 8, the second piston 6 has a longitudinal groove 6d formed in the annular recess 6a, and the step surface 6e of the lower body 6c has an axis O6 at the position of the longitudinal groove 6d. A concave shape is formed along the direction toward the pressure receiving surface 6f of the second piston 6. In this case, when the second piston 6 is assembled to the second syringe 5, the sealing member 7 slides with the second syringe 5 to change the state shown in the two-dot chain line in FIG. Even if it is rolled as shown by the two-dot chain line, after assembling, the vertical groove 6d serves as an underpass by returning to the state shown by the two-dot chain line in FIG. Thus, air can be introduced from the gap C.

In the present invention, when the piston shaft 3 is pushed in and the first piston 2 in the first syringe 1 is operated, the first piston 2 compresses the air in the first syringe 1. Then, the shaft portion 4a of the rod member 4, by pushing the second syringe 5, moves the second piston 6 of the second syringe within 5, the compressed air, the tubular body portion 1c and the shaft portion 4 a The content liquid in the filling space S formed between the second syringe 5 and the second piston 6 through the air passage r2 formed in the second syringe 5 from the annular passage r1 formed inside Can be mixed. Therefore, according to the present invention, the content liquid mixed with air can be taken out in a volume corresponding to the second syringe 5 by a simple operation of simply pushing the piston shaft 3.

  Further, since the second piston 6 is operated by the rod member 4 pushed out by the first piston 2, the second syringe 5 and the second piston 6 can be adopted as a mechanism for filling and pumping the content liquid. As a mechanism for driving the second piston 6, the first syringe 1 and the first piston 2 can be employed. In this case, only the mechanism for filling and pumping the content liquid, that is, only the second syringe 5 and the second piston 6 can be reduced without downsizing the mechanism for driving the second piston 6. 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.

  Therefore, according to the present invention, it is possible to provide a novel air mixing type ejector that can take out a small amount of content liquid in a mixed state with air.

  Moreover, in this embodiment, as shown in FIG. 1, the second syringe 5 is provided with a sealing plug 9. The sealing plug 9 is connected via a severable connecting portion 9a. As a result, the filling space S is completely sealed. And the sealing stopper 9 forms the jet nozzle 5c in the front-end | tip of the 2nd syringe 5 by isolate | separating from the 2nd syringe 5 as shown in FIG. Note that the sealing plug is not a “drilling plug” as in this embodiment, and can be replaced with a cap or the like.

  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 second syringe 5 can be configured not to be removable from the first syringe 1. Further, the content liquid can be ejected in the form of a mist or foam, but by providing a mesh or a sintered body at the ejection port 5c, the content liquid mixed with air is further ejected in a foam form. be able to. Furthermore, according to this invention, the component of each form can be diverted between each form.

  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 contents is not limited.

DESCRIPTION OF SYMBOLS 1 1st syringe 1a trunk | drum 1b shoulder part 1c cylinder part 1d finger hook part 1e tip outer cylinder 1s screw part 2 1st piston 3 piston shaft 4 rod member 4a shaft part 4b press part 5 2nd syringe 5a flange part 5b groove part ( Air flow path)
5c Jet 6 Second piston 7 Seal member 8 Retaining member 9 Seal plug A Cartridge B Operating tool C Clearance r Internal passage r1 Annular passage r2 Air passage S Filling space (content liquid)

Claims (4)

A first syringe provided with a cylindrical body portion having a diameter smaller than that of the body portion at one end of the hollow body portion, and a first piston for pumping air in the first syringe, and the air inside the tubular body portion A piston shaft that pushes into an internal passage formed in the inner passage, and a shaft portion that is disposed in the internal passage of the cylindrical body portion and forms a passage of air pushed out by the first piston between the cylindrical body portion and A rod member provided with a pressing portion that receives the first piston together with the shaft portion and causes the shaft portion to protrude from the internal passage, and a second piston that can move using a pressing force from the rod member as an urging force. An air flow path for mixing the air pushed out by the first piston with the content liquid in the filling space formed between the piston and the second syringe is formed inside ,
When the second piston is pushed by the rod member and moves from the position where the filling space is blocked from the internal passage of the cylindrical body part to the position where the air flow path is formed, the air pressure-fed from the first syringe is An air mixing type ejector which is supplied to a filling space via an air flow path .   The air mixing type ejector according to claim 1, wherein the air flow path is a groove formed on an inner peripheral surface of the second syringe.   3. The air mixing type ejector according to claim 1, wherein at least one of the second piston and the second syringe is provided with a locking means for locking the second piston to the second syringe. 4. The retaining device according to any one of claims 1 to 3, wherein at least one of the rod member and the first syringe is provided with a retaining means for preventing the shaft portion of the rod member from entering the first syringe. An air mixing type ejector.

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