JP2003054663A - Aerosol container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol container capable of softly and gently spraying liquid contents while maintaining the desired quantity of discharge. SOLUTION: The aerosol container 100 is composed of a container main body 102, a dip tube 104, a valve mechanism 106, and a discharge nozzle portion 108. A liquid chamber 112 is provided in the valve mechanism 106, and a capillary tube 116 is inserted into a connection of both the dip tube 104 and the liquid chamber 112. A filter 110 is provided at an open end of the dip tube 104. Liquid contents from which foreign substances are removed by the filter 110 flow into the dip tube 104, and after their flow rate is sufficiently controlled by the capillary tube 116, they are discharged to ambient air in an aerosolized state.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol container for discharging a liquid content contained in a container by pressing the container, and more particularly, to a simple aerosol container. The present invention relates to an aerosol container capable of freely and gently spraying by restricting the discharge speed of a liquid content by a method. [0002] Aerosol containers for discharging liquid contents contained in containers are widely used in cosmetics and the like.
Here, aerosols include not only aerosols in the original sense consisting of colloidal particles in which liquid fine particles are dispersed in a gas or solid, but also products that discharge liquids and the like from pressure-resistant containers using the pressure of gas. Including. For example, in the case of cosmetics, aerosol containers are widely used due to their good functionality, and are used as liquid (fog) products for hair sprays and the like. As shown in FIG. 2, for example, a conventional aerosol container 1 has a container body 2 for containing liquid contents such as cosmetics and a liquid body for sucking the liquid contents in the container body 2. A dip tube 3 serving as a passage, a valve mechanism 4 connected to the dip tube 3, and a discharge nozzle (push button) 5 connected to the valve mechanism 4
And A pressurized gas such as a liquefied gas or a compressed gas is enclosed in the container body 2 together with a liquid content. [0005] One end of the dip tube 3 is
The other end of the dip tube 3 is connected to the lower end of the valve mechanism 4. The valve mechanism 4 is provided with a liquid chamber (housing) 6 composed of a narrow cylindrical portion 5a having a step and a wide cylindrical portion 5b. The narrow-diameter cylindrical portion 5 a of the liquid chamber 6 has the upper end of the dip tube 3 fitted outside. A substantially closed partition 12 is formed at the step of the liquid chamber 6, and an orifice (housing orifice) 7 a is formed at the center of the partition 12. Also, an orifice (vapor tap orifice) 7b is formed on the side wall of the large-diameter cylindrical portion 5b. The upper end of the wide-diameter cylindrical portion 5b is expanded, and a cylindrical packing 8 is provided at a step formed by the expansion. One end of an upper cover (mounting cup) 10 is locked to the upper end of the wide-diameter cylindrical portion 5b with the packing 8 interposed therebetween. The upper lid 10 is provided so that a member having a substantially S-shaped cross section forms an opening 20 having a diameter substantially equal to the inner diameter of the wide cylindrical portion 5b. Is locked to the upper end of the wide-diameter cylindrical portion 5b, and the other end is locked to the upper end of the container body 2. As a result, the opening of the container body 2 is closed by the upper lid 10 slightly entering the inside from the opening. A spring 11 is provided in the liquid chamber 6, and the lower end of the spring 11 has a stepped partition wall 12.
It is locked to. The discharge nozzle section 5 is provided with a stem 13, a nozzle 14, and a holder 15 for accommodating the stem 13 and the nozzle 14. The stem 13 has a cylindrical shape, and a projection 16 is provided at the lower end of the stem 13.
A number of grooves are formed in the outer periphery of the tip end of No. 6 in the vertical direction in FIG. 2 (not shown). Further, a not-shown circumferential groove is formed on the outer periphery of the base of the protrusion 16, and a hole 9a is formed in the circumferential groove. A long hole 9b opening upward is formed in the stem 13, and the long hole 9b communicates with the orbital groove via the hole 9a. Stem 13
The projection 16 is in sliding contact with the inner wall of the wide-diameter cylindrical portion 5b of the liquid chamber 6 via the end of the upper lid 10 on the opening 20 side and the packing 8. The nozzle 14 has a cylindrical shape with one end closed, and a hole 9c is formed in the closed barrier. The open ends of the nozzle 14 and the stem 13 are respectively inserted and fixed to the cylindrical portions 18a and 18b of the holder 15 provided so as to extend substantially at right angles through the partition wall 17. An orifice 7c is formed in the partition wall 17, and the nozzle 14 and the stem 1 are formed through the orifice 7c.
The three internal spaces communicate with each other. The cylindrical portions 18a, 1
8b is formed integrally with the cylindrical outer wall 19 of the holder 15, and the lower end of the outer wall 19 is slightly widened to form the upper lid 1
0 is inserted into the outer peripheral wall. As a material of the aerosol container, a container body 2
, A metal or a synthetic resin is used, and each member of the dip tube 3, the valve mechanism 4, and the discharge nozzle section 5 is usually made of a synthetic resin. The operation of the conventional aerosol container 1 configured as described above will be described below. FIG. 2 shows a state in which the ejected nozzle section 5 is pushed up by the restoring force of the spring. In this state, the upper end of the wide-diameter cylindrical portion 5b of the liquid chamber 6 is closed by the cylindrical portion above the stem 13 that has risen.
The flow of the liquid contents and the pressurized gas is blocked.
Note that the dip tube 3 is moved while the stem 13 is raised.
The liquid chamber 6 is in a liquid-tight state due to the liquid content flowing into the dip tube 3 from the lower end of the liquid chamber 6. Next, when the discharge nozzle portion 5 is pressed with a force exceeding the stress of the spring 11, the stem 13 descends,
The inside of the liquid chamber 6 and the long hole 9b of the stem 13 communicate with each other via the groove of the protrusion 10 of the stem 13 and the hole 9a.
Thus, the liquid content flowing into the dip tube 3 flows into the liquid chamber 6 while the flow rate is restricted by the orifice 7a. On the other hand, the pressurized gas in the container body 2 flows into the liquid chamber 6 through the orifice 7b and is mixed with the liquid content. The mixture of the pressurized gas and the liquid content passes through the groove of the projection 16 of the stem 13 and flows into the long hole 9b of the stem 13 through the hole 9a. Further, the mixture of the pressurized gas and the liquid content whose flow rate is restricted by the orifice 7c reaches the nozzle 14 and is discharged to the atmosphere from the hole 9c in an aerosol state. [0016] For example, when a cosmetic is sprayed on the head or face using the conventional aerosol container described above, a desired discharge amount is ensured,
For safety reasons, it is required that the spray speed can be softened by limiting the discharge speed. For that purpose, it is necessary to form the diameter of the orifice of each member to be considerably small. However, it is usually difficult to form an orifice having a fine diameter in a manufacturing process of each member formed by injection molding using a synthetic resin as a material. In some cases, this may not be possible and may cause user discomfort. The present invention has been made in view of these problems, and the discharge speed of a liquid content is freely limited by a simple manufacturing method so that a desired discharge amount can be secured.
An object of the present invention is to provide an aerosol container that can spray softly and gently. An aerosol container according to the present invention comprises a container body for containing a liquid content and a dip serving as a passage for sucking the liquid content in the container body. In an aerosol container provided with a tube, a valve mechanism connected to the dip tube, and a discharge nozzle portion connected to the valve mechanism, a filter is provided on the dip tube, and a connection point between the dip tube and the valve mechanism is provided. Is provided with a capillary tube. Here, a cylindrical tube is preferably used as the capillary tube, but the present invention is not limited to this, and the cross-sectional shape may be rectangular or the like. In addition, it is also preferable to provide unevenness or the like inside to make the flow path have resistance. Such a capillary tube can be easily formed to have an arbitrary narrow diameter by a stretching method using a synthetic resin as a material. Therefore, a method of forming an orifice having a fine diameter by an injection molding method is used. It is much simpler than that, and the desired discharge speed of the liquid content can be reliably obtained. At this time, since the length of the capillary tube can be freely set, by adjusting the length and diameter of the capillary tube to appropriate dimensions, the balance between the discharge amount of the liquid content and the discharge speed can be adjusted to a desired condition. It can be. In addition, since a filter is provided in the dip tube, foreign matter may be generated in the liquid content in the container due to a problem in the storage environment, such as leaving the aerosol container in direct sunlight for a long period of time. However, since the filter is reliably removed by this filter, there is no inconvenience that the capillary tube is blocked by foreign matter. Here, as the filter, a mesh-shaped wire mesh or the like can be suitably used, but the filter is not limited to this, and a porous film or the like can be used as long as it can remove foreign matter. Preferred embodiments of an aerosol container according to the present invention (hereinafter, referred to as embodiments) will be described below with reference to the drawings. An aerosol container 100 according to the present embodiment shown in FIG. 1 has a container body 102 for containing liquid contents such as cosmetics, and a liquid contents in the container body 102 for sucking the liquid contents. Dip tube 1 which becomes the passage of
04, a valve mechanism 106 connected to the dip tube 104, and a discharge nozzle (push button) 108 connected to the valve mechanism 16. A pressurized gas such as a liquefied gas or a compressed gas is enclosed in the container body 102 together with the liquid contents. One end of the dip tube 104 is opened near the bottom of the container body 102, and a mesh filter 110 is attached to the opening. On the other hand, the other end of the dip tube 104 is connected to the lower end of the valve mechanism 106. The valve mechanism 106 is provided with a liquid chamber (housing) 112 composed of a narrow cylindrical portion 114 having a step and a wide cylindrical portion 122. This liquid chamber 1
Twelve narrow-diameter cylindrical portions 114 fit the upper end of the dip tube 104 outside. In the narrow-diameter cylindrical portion 114, for example,
A capillary tube 116 having a fine inner diameter with a flow path area of about 5 × 10 ⁻³ mm ^{2 to} 5 × 10 ⁻¹ mm ² is inserted, and the upper end of the capillary tube 116 is formed at a step in the liquid chamber. Is locked to the partition wall 118. The length of the capillary tube 116 is, for example, 5 to 100.
mm. An orifice (housing orifice) 120 is formed at the center of the partition 118 at the step of the liquid chamber. An orifice (vapor tap orifice) 124 is also formed on the side wall of the wide-diameter cylindrical portion 122. The orifice 124 can be omitted.
The upper end of the wide-diameter cylindrical portion 122 is expanded, and a cylindrical packing 126 is provided at a step formed by the expansion. With the packing 126 interposed, the wide-diameter cylindrical portion 12
One end of an upper lid (mounting cup) 128 is locked to an upper end of the second cover 2. The upper lid 128 is a member having a substantially S-shaped cross section and is provided so as to form an opening 130 having a diameter substantially the same as the inner diameter of the wide-diameter cylindrical portion 122, and one end on the opening 130 side has a wide end. The upper end of the diameter cylindrical portion 122 is locked, and the other end is locked to the upper end of the container body 102. Thereby, the container body 102
Is closed by an upper lid 128 slightly entering the inside from the opening. A spring 132 is provided in the liquid chamber 112, and the lower end of the spring 132 is engaged with the partition 118 at the step. The discharge nozzle portion 108 has a stem 134.
, Nozzle 136, stem 134 and nozzle 136
Is provided. The stem 134 has a cylindrical shape, and a projection 140 is provided at the lower end of the stem 134, and a number of grooves are formed in the outer periphery of the projection 140 in the vertical direction. ). Further, a peripheral groove (not shown) is formed on the outer periphery of the base of the protrusion 140, and a hole 142 is formed in the peripheral groove. A long hole 144 opening upward is formed in the stem 134, and communicates with the circumferential groove through the hole 142. The protruding portion 140 of the stem 134 is provided so as to be in sliding contact with the inner wall of the wide-diameter cylindrical portion 122 of the liquid chamber 112 via the end of the upper lid 128 on the opening 130 side and the packing 126. The nozzle 136 has a cylindrical shape with one end closed, and a hole 146 is formed in the closed barrier. The open ends of the nozzle 136 and the stem 134 are inserted and fixed to the cylindrical portions 150 and 152 of a holder 138 that is provided to extend in a substantially right angle direction with a partition wall 148 therebetween. The partition wall 148 has an orifice 154
Is formed, and the nozzle 136 communicates with the internal space of the stem 134 through the orifice 154. A cylindrical outer wall 156 of the holder 138 is formed integrally with the cylindrical portions 150 and 152, and the lower end of the outer wall 156 is slightly widened and inserted into the outer peripheral wall of the upper lid 128. As a material of the aerosol container 100, a metal or a synthetic resin is used for the container body 102, and a synthetic resin is usually used for each member of the dip tube 104, the valve mechanism 106 and the discharge nozzle portion 108. . When a synthetic resin is used, each member is formed by an injection molding method. The capillary tube 116 is formed by a stretching method using a synthetic resin as a material. The operation of the aerosol container 100 thus constructed according to the present embodiment will be described below. FIG. 1 shows a state in which the ejected nozzle 108 which has been pushed in is raised by the restoring force of the spring 132. In this state, since the upper end of the large-diameter cylindrical portion 122 of the liquid chamber 112 is closed by the cylindrical portion above the raised stem 134, the flow of the liquid content and the pressurized gas is prevented. The liquid chamber 112 is in a liquid-tight state due to the liquid content flowing into the dip tube 104 from the lower end of the dip tube 104 while the stem 134 is rising. Next, when the discharge nozzle portion 108 is pressed with a force exceeding the stress of the spring 132, the stem 134 is lowered, and the inside of the liquid chamber 112 and the The long hole 144 is communicated. Thus, the liquid content flowing into the dip tube 104 flows into the liquid chamber 112 while being further decelerated by the orifice 120 after the flow rate is restricted by the capillary tube 116. On the other hand, the pressurized gas in the container body 102 flows into the liquid chamber 112 via the orifice 124 and is mixed with the liquid content. The mixture of the pressurized gas and the liquid content is
4 through the groove of the protrusion 140, and flows into the long hole 144 of the stem 134 through the hole 142. Further, the mixture of the pressurized gas and the liquid content whose flow rate is restricted by the orifice 154 reaches the nozzle 136 and is discharged to the atmosphere from the hole 146 in an aerosol state. The aerosol container 10 according to the present embodiment.
According to 0, since the capillary tube 116 having an extremely small diameter can be easily formed, the discharge speed of the liquid content can be reliably restricted, and the spray can be gently sprayed gently. Never invite. Also, by setting the length and diameter of the capillary tube 116 to appropriate dimensions, it is possible to easily obtain a desired discharge amount and a discharge speed of the liquid content. Further, even when foreign matter is generated in the liquid content in the container, the filter
As a result, the foreign matter is reliably removed, so that there is no inconvenience that the capillary tube 116 is blocked by the foreign matter. According to the aerosol container of the present invention,
By using a capillary tube manufactured by a simple method, a desired discharge speed can be reliably obtained while a desired discharge amount of a liquid content is secured, and the user does not feel uncomfortable. [0037]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view of an aerosol container according to an embodiment of the present invention, with a part thereof omitted. FIG. 2 is a schematic cross-sectional view of a conventional aerosol container partially omitted. [Description of Signs] 100 Aerosol container 102 Container main body 104 Dip tube 106 Valve mechanism 108 Discharge nozzle part 110 Filter 112 Liquid chamber 116 Capillary tube 134 Stem 136 Nozzle

Claims (1)

Claims: 1. A container body for accommodating a liquid content, a dip tube serving as a passage for sucking the liquid content in the container body, and connected to the dip tube. An aerosol container including a valve mechanism and a discharge nozzle connected to the valve mechanism, wherein a filter is provided on the dip tube, and a capillary tube is provided at a connection point between the dip tube and the valve mechanism. Aerosol container.