JP4953992B2 - Spout head - Google Patents

Description

  The present invention relates to an ejection head that is mounted on a stem or the like of an aerosol container using a pressurized medium or a container with a pump with priming and the like and is suitable for discharging an appropriate amount of contents in the container by a pressing operation.

  In a container for storing cosmetics such as a milky lotion or a container for storing shampoo, rinse, hairdressing or the like, an ejection head that can discharge an appropriate amount of the contents in the container by a pressing operation is mounted.

  By the way, in this type of ejection head, the nozzle outlet is normally kept open, and when the contents remaining in the ejection head are solidified, the ejection head is smooth. There was a disadvantage that it could not be operated.

In recent years, in order to solve the conventional problems as described above, a nozzle pin having a tip portion that fits the nozzle outlet is incorporated in the head body of the ejection head, and the nozzle pin is installed only when the ejection nozzle is pressed. A jet head that slides to open the nozzle outlet has been proposed (see, for example, Patent Document 1), and attempts have been made to avoid solidification of the contents remaining in the jet head. In an aerosol container using a pressure medium, since the inside of the head main body is maintained at a relatively high pressure even after the pressing operation of the ejection head is stopped, this pressure causes the nozzle pin to slide backward. In other words, a gap is formed between the nozzle pin and the jet nozzle, causing dripping.
Patent No. 3814753

  An object of the present invention is to propose a novel ejection head capable of avoiding the conventional problems as described above.

The present invention is a jet head including a shut-off pin that opens a jet port of a nozzle portion by sliding backward in conjunction with the pushing operation of the head body,
The head body is provided with a joint member that forms a feeding path for the contents between the container stem and the container body,
The joint member has a cylindrical body fitted and held on the stem of the container, and a discharge pipe body that is slidably linked to the inlet side opening of the head main body while maintaining a liquid-tight state with respect to the cylindrical body. An ejecting head comprising a base that is slidably linked.

  In the ejection head configured as described above, the cylinder and the head main body may be provided with a retaining member that maintains the linkage with the base.

  The container is preferably an aerosol container. Moreover, the said cylinder can be provided with the seal lip which ensures the sealing performance between bases in the front-end | tip part. Further, instead of the seal lip, an O-ring may be disposed on the outer peripheral wall of the cylinder so as to improve the sealing performance with the base.

  Further, the cylindrical body may be formed with a cross-shaped rod having a distal end portion slidably inserted into the discharge tube body of the base and connected in a non-removable manner by a claw portion.

  The joint member consists of a cylinder (stem piston) fitted and held on the stem of the container and a base, and the base is slid along the axis of the cylinder using the pressure in the head body. Since the closed space region is expanded (the volume is increased), the pressure drops and the force for sliding the shut-off pin backward is reduced.

  In particular, when the container filled with the contents is an aerosol container, the pressure drop due to the slide of the base becomes more remarkable because the pressure of the pressurizing medium is relatively high.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a view schematically showing an embodiment of an ejection head according to the present invention, in which 1 is a stem of the container. The stem 1 is pushed downward to discharge the contents in the container.

2 is a head body. The head body 2 includes a top wall 2a that forms a pressing portion of the ejection head, and a peripheral wall 2b that is integrally connected to the edge of the top wall 2a to form an opening that opens downward. The head main body 2 has a space area M defined by partition walls K (horizontal partition walls K ₁ and vertical partition walls K ₂ ) and a passage r connected to the space area M, and is suspended by the horizontal partition wall K ₁ . annulus 2c (be linked integrally with the partition walls K ₁ to form an inlet side opening into the space region M.) are formed.

  Reference numeral 3 denotes a nozzle portion for ejecting the contents fed to the space region M to the outside through the ejection port n. The nozzle portion 3 includes a body portion 3a that fits into an opening h formed in the peripheral wall 2b of the head body 2, and a tip portion 3b that is connected to the body portion 3a and protrudes outside the head body 2.

Reference numeral 4 denotes a shut-off pin disposed in the space region M of the head body 2. The shut-off pin 4 includes a tip portion 4a that fits the nozzle n of the nozzle portion 3, a body portion 4b that fits into a recess in the tip portion 4a and holds the tip portion 4a, and a body portion 4b in conjunction with the stepped portion 4b '(pressed toward the body portion 4a in spout n.) elastically supporting the shut-off pin 4 are made of spring 4c which, through hole of vertical partitions K ₂ at its rear end A convex portion 4d that passes through K ₂ ′ and protrudes backward is formed. The tip end portion 4a of the shut-off pin 4 is composed of a soft member such as rubber or elastomer in order to improve the sealing performance at the ejection port n.

Reference numeral 5 denotes a seal member disposed in the space region M. The end of the seal member 5 is slidably in contact with the body portion 4b of the shut-off pin 4 to prevent leakage of contents from the through hole K ₂ ′.

A joint member 6 connects the stem 1a of the container 1 and the head body 2 to each other. The joint member 6 has a content feeding path U formed on the inside thereof, and a cylindrical body 6a fitted to the stem 1 of the container (a seal lip 6a at the distal end portion to ensure a sealing property in a sliding state). ₁ ) and a base 6b that is disposed inside the head body 2 and is retained by a claw portion (such as an undercut that functions as a retaining member) C formed at the lower end of the peripheral wall 2b.

Base 6b constituting the joint member 6 and the top wall 6b ₁ having a horizontal surface, as well as integrally connected to the edge of the top wall 6b ₁ consists sidewall 6b ₂ having an outer surface along the peripheral wall 2b, the top panel wall 6b ₁ A lower cylinder 7 is provided on the lower surface so as to be slidable while maintaining a liquid-tight state with respect to the cylinder body 6a. An associated discharge pipe body 8 (having a seal lip 8a at the distal end to ensure sealing performance in a sliding state) is provided.

Reference numeral 9 denotes a lever having a “shape” disposed adjacent to the space region M in the head body 2. The lever 9 includes an arm 9a and a leg portion 9b connected to the arm 9a, and a pivot 9c (the pivot 9c is provided on a support member P fixedly held in the head body 2). has become swingable, the end of the arm 9a is linked to the convex portion 4d of the shut-off pin 4, so that it is possible to lower the leg portion 9b abuts against the top wall 6b ₁ of the base 6b.

10 has a claw portion at the tip portion, an annular body provided integrally with the outer peripheral wall of the cylindrical body 6a (or those provided with a plurality of shaped like a rod.), 11 of the top panel wall 6b ₁ of the base 6b An annular body (a plurality of rod-shaped members may be provided) arranged so as to bend and flex the lower cylinder 7 on the lower surface. A claw portion 11a that engages with the claw portion 10a of the tubular body 10 is formed at the lower end of the inner peripheral wall of the annular body 11, and the claw portions 10a and 11a prevent the base 6b from being pulled out from the cylindrical body 6a. The claw portion 11a constitutes a retaining member.

In the ejection head configured as described above, the base 6b constituting the joint member 6 can freely slide up and down by the dimension S along the axis L of the cylindrical body 6a (actually, the base 6b Since the top wall 6b ₁ slides within the range of the dimension S ′ until it comes into contact with the lower end of the leg 9b of the lever 9 (see FIG. 1), the pressure in the head main body 2 after stopping the ejection of the contents The volume of the space region in the head body 2 (which means a closed space region from the stem 1a to the nozzle outlet n of the nozzle portion 3) is expanded by the slide of the base 6b even if the height of the base 6b increases. (Refer to part D in FIG. 3) The internal pressure will drop accordingly, and there will be no force that causes the shut-off pin 4 to slide backward (the base 6b is Always pushed to the bottom by being pushed by the leg 9b Thus, when the pressure in the head body 2 is high at the stage where the pushing force of the head body 2 is released, the base 6b is surely slid upward with the pressure to increase the volume of the closed space region. .)

In order to eject the contents in the container, first, a finger is applied to the top wall 2a of the head body 2 and the head body 2 is pushed downward. The pushing head body 2 is moved downward relative to the base 6b within the dimension t (see FIG. 1), the leg portion 9b of the lever 9 abuts on the top panel wall 6b ₁ of the base 6b.

Still continue pushing into the lower head body 2, the leg portion 9b as shown in FIG. 2 is pushed upward by the top panel wall 6b ₁ of the base 6b, this time, then the arm 9a is in the fulcrum pivot 9c The shut-off pin 4 slides rearward due to the fall, and the tip of the pin is separated from the jet port n of the nozzle portion 3 to open the jet port n.

  The stem 1a is pressed almost simultaneously with the opening of the ejection port n, and the contents in the container are ejected from the ejection port n of the nozzle part 3 to the outside through the feeding path U, the passage r, and the space region M of the joint member 6. Will be.

  In order to stop the discharge of the contents, it is only necessary to remove the force applied to the head body 2, and the head body 2 returns to the initial position and the base 6b is positioned at the upper end of the cylinder 6a as shown in FIG. The volume of the closed space region is expanded by sliding toward (the portion D in FIG. 3 is the volume expansion range), and the internal pressure drops.

  FIG. 4 is a view showing another embodiment of the ejection head according to the present invention (showing the same state as FIG. 3 (the state after the base body 2 is slid)). In this example, in order to reduce the number of parts, the seal member 5 is integrally formed with the shut-off pin 4, a flange 12 is provided instead of the annular body 10, and an O-ring is provided on the outer peripheral wall of the cylindrical body 6a. This is related to the configuration in which 13 is arranged.

  The ejection head having the above-described configuration can lower the pressure in the base body 2 by sliding along the cylindrical body 6a of the base 6b in the same manner as shown in FIG. In addition, there is an advantage that the sealing performance between the cylinder 6a and the lower cylinder 7 can be further improved.

  In this ejection head, when the base 6b slides, the lower end 12a of the outer edge of the flange 12 is caught by the claw portion 11a of the annular body 11 to prevent the base 6b from being pulled out from the cylindrical body 6a (linkage with the base 6a). The claw portion 11a constitutes a retaining member.

  FIG. 5 is a view showing still another embodiment of the ejection head according to the present invention. In this example, a rod 14 having a cross-shaped cross section is integrally provided at the upper end of the cylindrical body 6a, and the distal end portion of the rod 14 is provided at the distal end portion by being inserted into the discharge pipe body 8 of the base 6b. The claw portion 14a is connected so as not to come off.

  Also in this case, the base 6b can slide along the axial center of the cylindrical body 6, and the volume of the closed space region is expanded by positioning the base 6b at the upper end of the rod 14.

  In particular, in the case where the rod 14 is provided, the cross-sectional shape of the base 6b can be simplified, and the quality of the constituent members can be stabilized. The cross section of the rod 14 has a cross shape for the purpose of securing a passage through which the contents pass. However, if the passage through which the contents pass can be secured, the cross-sectional shape can be changed as appropriate.

  The ejection head according to the present invention can be applied to any container, whether an aerosol type container or a pump (accumulation type) container, as long as the contents can be ejected by pressing the stem. However, there is no limitation on this point.

  It is possible to provide an ejection head that can avoid the occurrence of liquid dripping associated with an increase in pressure in the head body.

It is the figure which showed embodiment of the ejection head according to this invention. FIG. 2 is a diagram showing a state of ejection of contents in the ejection head shown in FIG. It is the figure which showed the state by which the volume of the closed space area was expanded. It is the figure which showed other embodiment according to this invention. It is the figure which showed other embodiment according to this invention.

Explanation of symbols

1 stem
2 Head body
3 Nozzle
4 Shutoff pin
5 Seal material
6 Joint member
7 Lower cylinder
8 Discharge tube
9 Lever
10 Ring
11 Toroidal
12 Flange
13 O-ring
14 Rod
M space domain
K bulkhead

Claims (7)

In the ejection head equipped with a shut-off pin that opens the ejection port of the nozzle part by sliding backward in conjunction with the pushing operation of the head body,
The head body is provided with a joint member that forms a feeding path for the contents between the container stem and the container body,
The joint member has a cylindrical body fitted and held on the stem of the container, and a discharge pipe body that is slidably linked to the inlet side opening of the head main body while maintaining a liquid-tight state with respect to the cylindrical body. A jet head characterized by comprising a slidably linked base.   2. The ejection head according to claim 1, wherein the cylindrical body has a retaining member that maintains linkage with the base.   3. The ejection head according to claim 1, wherein the head main body includes a retaining member that maintains linkage with the base.   The ejection head according to any one of claims 1 to 3, wherein the container is an aerosol container.   5. The ejection head according to claim 1, wherein the cylindrical body has a sealing lip that secures a sealing property between the cylindrical body and the base.   The ejection head according to any one of claims 1 to 4, wherein the cylindrical body has an O-ring on its outer peripheral wall to enhance a sealing property between the cylindrical body and the base.   The ejection head according to any one of claims 1 to 6, wherein the cylindrical body includes a rod having a cross-shaped cross section in which a distal end portion is slidably inserted into a discharge tube body of a base and is connected to be unremovable by a claw portion. .

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