JP2004033830A - Spray nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spray nozzle equipped with a nozzle member constituted so that an fitting insertion cylinder having a leading end functioning as a head inner cylinder is accurately aligned with the interior of the nozzle head to be easily fitted and inserted in the nozzle head. <P>SOLUTION: The spray nozzle is equipped with the nozzle head having a jet orifice formed on its top wall, the connection cylinder provided with a hollow chamber suspended from the nozzle head and a nozzle exterior member, and characterized in that the cylindrical fitting and inserting cylinder, of which the leading end is formed into the head inner cylinder, is fitted and inserted in the nozzle head so that the upper end of the head inner cylinder comes into contact with the top wall of the nozzle head. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a spray nozzle, and more particularly to a spray nozzle provided with a connecting cylinder of a nozzle member into which a fitting insertion tube having a head inner cylinder at the tip is inserted.
[0002]
[Prior art]
A nozzle member in which an insert pin (5) is inserted into a hollow portion (16) of a nozzle is conventionally known as described in JP-A-2001-79089.
In the above publication, a hollow small-diameter portion (17) is provided at the tip of the hollow portion (16) with a step (19) as a boundary, and the small diameter portion (17) is provided at the tip of the insert pin (5) with a step (26) as a boundary. 24), the first embodiment in which the step (26) of the insert pin (5) is fitted so as to abut the step (19) of the hollow part (16), and the tip of the hollow part (16). A hollow taper portion (51) is formed at the portion, a taper portion (53) is formed at the tip of the insert pin (5), and the taper portion (53) of the insert pin (5) is formed into a tapered surface of the hollow taper portion (51). Two techniques of the second embodiment, which are inserted so as to abut against the rim, are described.
[0003]
[Problems to be solved by the invention]
In the technique described as the first embodiment, the hollow portion (16) and the insert pin (5) are positioned by bringing the step portions (19) and (26) into contact with each other.
Therefore, the position of the step portion (19) of the hollow portion (16) and the shape of the hollow small diameter portion (17), and the position of the step portion (26) of the insert pin (5) and the shape of the small diameter portion (24) are accurately determined. If any one of them causes a molding failure or a dimensional error, the positioning accuracy of the step becomes inaccurate, and the gap between the end face of the hollow portion (16) and the end face of the insert pin (5) is lost. There has been a problem that a dimensional error occurs and the ejection flow path of the nozzle is not accurately formed.
[0004]
In the technique described as the second embodiment, the hollow tapered portion (51) of the hollow portion (16) and the tapered portion (53) of the insert pin (5) are positioned by bringing their respective tapered surfaces into contact with each other. are doing.
For this reason, the starting position of the tapered surface of the hollow tapered portion (51) and the tapered portion (53) of the insert pin (5) and the inclination angle of the tapered surface must be accurately formed. When a dimensional error occurs, a problem arises in that the two cannot be accurately positioned and abutted, and there is a problem that the ejection flow path of the nozzle cannot be formed accurately.
[0005]
The present invention has an object to solve the above problems, and has a nozzle member which is capable of accurately aligning and inserting a fitting insertion tube having a head inner cylinder at a distal end into a nozzle head so as to be easily inserted. The purpose of the present invention is to provide a spray nozzle.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention includes, as a spray nozzle, a nozzle head having an ejection hole on a top wall, a connecting cylinder hanging down from the nozzle head and having a hollow chamber, and a nozzle exterior member. A spray nozzle, wherein a cylindrical fitting insertion tube having a head inner cylinder at the tip is fitted into the hollow chamber of the connecting cylinder so that the upper end of the head inner cylinder contacts the nozzle head top wall. adopt.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the spray nozzle of the present invention will be described with reference to the drawings. In FIG. 1, A is a mounting cap, B is a pump mounted on the mounting cap A, C is a nozzle member, and AO is a container filled with nasal drops or other medicinal liquids.
[0008]
The mounting cap A has a side peripheral wall 1 and an upper wall 2, and a screw 3 is screwed on an inner periphery of the side peripheral wall 1 to be screwed to a screw provided on an outer periphery of a mouth portion of the container AO 2. .
On the upper surface of the upper wall 2, a guide tube 4 is provided upright along the outer peripheral edge, and a mounting member 5 for the pump B is provided at the center.
A guide tube 6 is provided upright on the top wall of the mounting member 5, and a stem guide ring 7 is continuously provided on the inner peripheral edge.
[0009]
The pump B includes a cylinder B1 and a piston member B2. An attachment portion 8 at the upper end of the cylinder B1 is attached to the attachment member 5, and a suction pipe 9 is vertically provided at a lower end.
[0010]
The piston portion of the piston member B2 is built in the cylinder B1, and the internal structure of the pump B is such that the medicinal liquid or the like in the container AO can be sucked up and sprayed from the nozzle according to the operation of the nozzle member C. Since it is well known in the art, the description is omitted.
[0011]
The upper end of the piston member B2 is a discharge cylinder 10, and a stem 12 having a reduced diameter portion 11 provided at the upper end is fitted to the discharge cylinder 10.
[0012]
As shown in FIGS. 1 and 2, the nozzle member C includes a nozzle head 15, a connecting cylinder 17 that hangs down from the nozzle head 15, and has a hollow chamber 16 inside, and a nozzle exterior member connected to the outer periphery of the nozzle head 15. 18 and so on.
A jet hole 20 is drilled in the top wall 19 of the nozzle head 15, and the hollow chamber 16 has a head inner chamber 22 formed by the inner surface of the top wall 19 and the inner circumference of the small diameter portion 21 of the connecting cylinder 17, and a large chamber below the head inner chamber 22. And a diameter portion 23.
In the hollow chamber 16, a cylindrical fitting tube 25 having a head inner tube 24 fitted to the head inner chamber 22 having an upper end portion is fitted. A liquid flow path 26 communicating with the cylinder 24 is perforated.
[0013]
As shown in FIG. 3, a communication hole 27 extending in the radial direction from the liquid flow path 26 is formed in the head inner cylinder 24. A road 28 is provided.
The upper end surface of the head inner cylinder 24 is provided with a spin groove 29 continuous with the flow passage 28, and the upper end surface 30 of the spin groove 29 abuts on the top wall 19 of the nozzle head 15 and is continuously connected to the communication hole 27. The ejection passage 20 and the spin groove 29 form an ejection flow path reaching the ejection hole 20 between the head passage 22 and the inner wall surface of the head inner chamber 22.
[0014]
A bulging ring 31 is provided on the outer periphery of the lower end of the head inner cylinder 24 so as to engage with the inner periphery of the small diameter portion 21 of the connecting cylinder 17. It is formed so as to be fitted with a fixed interference with the inner periphery of the large diameter portion 23 of the connecting cylinder 17.
As shown in FIG. 2, the lower end of the connecting tube 17 is a fitting portion 33, which is fitted to the reduced diameter portion 11 of the stem 12 while leaving a gap 34 between the fitting tube 33 and the fitting tube 33. Has become.
When the reduced diameter portion is not provided on the stem 12, the inner circumference of the fitting portion 33 may be enlarged and fitted.
[0015]
As shown in FIG. 2, the nozzle exterior member 18 extends in an elongated substantially conical shape following the nozzle head 15, and is provided continuously with a nozzle outer cylinder 36 having a lower end as a cylinder 35 and a lower cylinder 35. A pressing plate 37 extends in the horizontal direction, and a guide cylinder 38 is provided vertically below the lower surface of the pressing plate 37.
The cylinder 35 at the lower end of the nozzle outer cylinder 36 is guided around the outer periphery of the guide cylinder 6 of the mounting cap A, and the guide cylinder 38 is positioned so as to slide and contact the guide cylinder 4 erected on the mounting cap A. are doing.
[0016]
Next, the operation and effect of the spray nozzle of the present invention will be described.
In the spray nozzle of the present invention, the nozzle member C is attached to the stem 12 of the pump B attached to the mounting cap A so as to fit the fitting portion 33 of the connecting cylinder 17 of the nozzle member C. Is screwed into a container A0 filled with nasal drops or other medicinal solutions via a packing.
[0017]
In assembling the nozzle member C, first, the insertion tube 25 is pushed into the hollow chamber 16 of the connecting tube 17 until the upper end surface 30 of the head inner tube 24 comes into contact with the inner surface of the top wall 19 of the nozzle head 15.
At this time, the head inner cylinder 24 of the fitting insertion tube 25 is fitted to the small diameter portion 21 of the connecting cylinder 17, and the bulging ring 31 is engaged with the inner periphery of the small diameter portion 21 to seal the ejection flow path and It acts to prevent the insertion tube 25 from retreating due to a rise in pressure or the like.
[0018]
Further, since the enlarged diameter portion 32 is fitted to the large diameter portion 23 with a fixed interference, the retraction of the fitting insertion tube 25 is prevented in conjunction with the action of the bulging ring 31 so that the fitting insertion tube 25 is fitted and held at a fixed position. Has become.
[0019]
In using the spray nozzle, when the overcap (not shown) is removed and the pressing plate 37 of the nozzle outer member 18 of the nozzle member C is pressed down, the piston member B2 of the pump B is pressed down, and the medicinal liquid and the like are transferred to the nozzle head 15. Can be sprayed from the ejection hole 20 of the nozzle.
[0020]
Next, when the hand is released from the pressing plate 37, the nozzle member C is raised by the urging of the spring loaded in the pump B, and the medicinal liquid or the like in the container AO enters the cylinder B1 of the pump B through the suction pipe 9. Can be sucked up.
[0021]
When the pressing plate 37 is pressed down, the insertion tube 25 is held in a fixed position by the enlarged diameter portion 32 and a gap is provided between the lower end of the insertion tube 25 and the upper end of the stem 12. As a result, no pressing force is applied between the upper end surface 30 of the head inner cylinder 24 and the top wall 19 of the nozzle head 15. Further, since the lower end cylinder 35 of the nozzle outer cylinder 36 is guided by the guide cylinder 6 and the guide cylinder 38 is guided by the guide cylinder 4, the vertical movement guide can be accurately performed without the pressing plate 37 being inclined at the time of pushing down.
[0022]
In the above-described embodiment, the small-diameter portion 21 and the large-diameter portion 23 are provided in the hollow chamber 16, and the large-diameter portion 32 is provided at the lower end of the insertion tube 25, but the hollow chamber 16 and the insertion tube 25 are not provided with a step. Both may be formed into a straight circular shape and fitted together.
[0023]
In the above embodiment, the spin groove 29 is provided at the upper end of the head inner cylinder 24, but may be provided at the lower surface of the nozzle head top wall 19.
Also, by changing the shape of the nozzle head, such as the shape of the ejection holes and the spin grooves, the spray pattern and the like can be changed.
[0024]
【The invention's effect】
The present invention has the following effects because it is configured as described above.
Since the insertion tube is inserted into the hollow chamber of the connection tube so that the upper end surface of the head inner cylinder abuts on the top wall of the nozzle head, the insertion tube can be easily and accurately aligned with the nozzle head. It became so.
Therefore, the ejection flow path can be accurately formed between the top wall of the nozzle head and the head inner cylinder.
[Brief description of the drawings]
FIG. 1 is a partially sectional elevation view of a spray nozzle of the present invention.
FIG. 2 is a sectional elevation view of a nozzle.
FIGS. 3A and 3B are explanatory diagrams of the insertion tube, wherein FIG. 3A is a top view and FIG. 3B is a sectional elevation view.
[Explanation of symbols]
A Mounting cap AO Container B Pump B1 Cylinder B2 Piston member C Nozzle member 1 Side peripheral wall 2 Upper wall 3 Screws 4, 6, 38 Guide tube 5 Mounting member 7 Stem guide ring 8 Mounting section 9 Suction pipe 10 Discharge cylinder 11 Reduced diameter section 12 Stem 15 Nozzle head 16 Hollow chamber 17 Connecting cylinder 18 Nozzle exterior member 19 Top wall 20 Spout hole 21 Small diameter section 22 Head inner chamber 23 Large diameter section 24 Head inner cylinder 25 Fitting cylinder 26 Liquid flow path 27 Communication hole 28 Flow path 29 Spin groove 30 Upper end surface 31 Swelling ring 32 Large diameter portion 33 Fitting portion 34 Gap 35 Cylinder 36 Nozzle outer cylinder 37 Press plate

Claims (1)

A nozzle head having an ejection hole on a top wall, a connection cylinder which is suspended from the nozzle head and has a hollow chamber, and a spray nozzle having a nozzle exterior member,
A spray nozzle, wherein a cylindrical fitting insertion tube having a head inner cylinder at the tip is fitted into a hollow chamber of the connecting cylinder so that an upper end of the head inner cylinder abuts a nozzle head top wall.

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