JP4999577B2 - Spout head - Google Patents

Description

  The present invention relates to an ejection head that is suitable for being attached to a stem such as an aerosol container using a pressurized medium or a pump-equipped container with priming and discharging an appropriate amount of contents in the container by the pressing operation.

  Many containers for cosmetics such as latex and containers for shampoo, rinse, hairdressing, etc. are equipped with an ejection head that can discharge the appropriate amount of contents in the container by pressing. Yes.

  By the way, in this type of ejection head, the nozzle ejection port is normally left open, and the contents remaining in the ejection head are easily solidified in the discharge space by contact with air. In this case, there is a disadvantage that the ejection head cannot be operated smoothly.

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 in the pressing operation of the ejection nozzle. A structure in which the nozzle outlet is slid to open is proposed (see, for example, Patent Document 1), thereby attempting to eliminate problems caused by solidification of the contents remaining in the discharge space. In particular, in the case where the contents are accompanied by foaming, the discharge space is maintained at a relatively high pressure even after the pressing operation of the ejection head is stopped. A force that presses the nozzle pin rearward may act. As a result, a gap is formed between the tip of the nozzle pin and the jet outlet, which may cause dripping, and there is still room for improvement in this regard.
Patent No. 3916936 Specification

  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 has a base that has a passage connected to the stem of the container and is movable in accordance with the movement of the stem, a head body that is slidably held by the base and has a content discharge space inside thereof, The head body is elastically supported so as to be slidable along the axis within the discharge space of the head body, and the nozzle outlet is opened by sliding backward as the head body is pushed in, so that the contents in the container are discharged to the stem and the outlet. An ejection head equipped with a nozzle pin that ejects to the outside through space,
The nozzle pin is adapted to the nozzle outlet and has a body portion having a tip portion that seals the nozzle outlet, and is connected to the body portion to be slidably linked with the seal member so that the discharge space is maintained in a liquid-tight state. A rear end portion having a sealing portion to
The seal member is formed in a cylindrical shape including a front end portion that is slidably fitted to the seal portion, and a flange portion that is provided at a rear end of the seal member and is fixedly held to the partition wall of the discharge space.
The seal portion is a jet head characterized by having a cross-sectional area equal to or smaller than a cross-sectional area of a tip portion.

  If the cross-sectional area of the seal part of the nozzle pin is less than or equal to the cross-sectional area of the tip part, the pressure receiving area of that part becomes equal or smaller. It is prevented from acting as a force directed toward opening the outlet.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 is a diagram schematically showing an embodiment of an ejection head as a reference example for explaining the present invention.

  In the figure, 1 is the stem of the container. The stem 1 is pushed downward to discharge the contents in the container.

  Reference numeral 2 denotes a base fixedly held on the stem 1. The base 2 includes a peripheral wall 2a that surrounds the stem 1, a top wall 2b that is integrally connected to the upper edge of the peripheral wall 2a and defines a recess that is released downward in cooperation with the peripheral wall 2a. It consists of a lower cylinder 2c that is suspended on the lower surface of the top wall 2b and fits to the stem 1, and an upper cylinder 2d that is integrally provided on the upper surface of the top wall 2b. The upper cylinder 2d and the lower cylinder 2c include A passage r through which the contents discharged from the stem 1 pass through the top wall 2b is formed.

  Reference numeral 3 denotes a head body. The head body 3 includes a peripheral wall 3a that is slidably fitted to the outer side of the peripheral wall 2a of the base 2, and a cover 3b that is integrally connected to an upper portion of the peripheral wall 3a and forms the external shape of the head main body 3. The lower end portion of the peripheral wall 3a is slidably fitted inside the opening portion of the cylindrical body e provided at the upper portion of the container.

  4 is an opening provided in the front surface of the cover 3b, 5 is a nozzle fitted into the opening 4, and the nozzle 5 has a spout 5a formed at the tip thereof (see FIG. 3).

  In addition, 6 is a horizontally disposed partition wall integrally provided inside the head body 3, and 7 is a vertically disposed body which is integrally provided inside the head body 3 and divides the head body 3 forward and backward. It is a partition, and a content discharge space m is formed in a region surrounded by the partitions 6 and 7 and the cover 3b.

Further, 8 is a cylinder suspended from the lower surface of the partition wall 6 in a horizontal arrangement. This cylinder 8 is slidably fitted to the upper cylinder 2d of the base 2 while maintaining a liquid-tight state, and the dimension t from the lower end to the top wall 2b of the base 2 is guided by the peripheral wall 2a. In this range, the head body 3 can be moved up and down with respect to the base 2, and a passage r ₁ that connects the upper cylinder 2 d and the discharge space m is formed inside thereof.

Further, 9 is provided in the partition 7 comprising a vertical arrangement, a through-hole connecting the auxiliary chamber m ₁ adjacent to the discharge space m the discharging space m Toko each other.

Reference numeral 10 denotes a nozzle pin that is slidably disposed along a fin-shaped guide 5b formed on the inner wall surface of the nozzle 5 in the discharge space m. The nozzle pin 10 includes a body portion 10b having a tip portion 10a having a diameter suitable for the nozzle 5a of the nozzle 5, a rear end portion 10c connected to the body portion 10b, a sub-end through the through hole 9 connected to the rear end portion 10c. It consists slotted end 10d projecting into the chamber m _1, each of these parts are formed by a single member.

11 is a seal member (O-ring) that is disposed between the through hole 9 and the rear end portion 10c of the nozzle pin 10 and holds the discharge space m in a liquid-tight state, and 12 is directed from the partition wall 7 to the jet port 5a. A holding member 13 that is fixed in the cylindrical body 7a extended in this manner is a spring that elastically supports the nozzle pin 10 so as to always press the nozzle pin 10 toward the ejection port 5a of the nozzle 5. The end of the body portion 10b have tongues 10b ₁ to form the annular groove provided therebetween surrounds the rear end portion 10c, the spring 13 is disposed therebetween the pressing member 12 and the annular groove.

14 is a lever member disposed in a region other than the discharge space m (area from the auxiliary chamber m ₁ up to the top wall 2b of the base 2). The lever member 14 includes a base portion 14a that is fixedly held on the lower side of the partition wall 6, and a “U” -shaped lever 14c that is swingably held by the base portion 14a via a pivot shaft 14b. Lever 14c, as shown its appearance in Figure 2, the bifurcated legs 14c ₁ having a tip in contact with the top wall 2b of the base 2 has a notch n the upper part, the nozzle pin 10 in the antechamber m ₁ adapting the end 10d in the notch n, it has a single arm 14c ₂ to coordinate.

In the ejection head having the above-described configuration, the cross-sectional area S ₁ of the front end portion 10a in which the cross-sectional area S of the seal portion (the outer surface of the rear end portion 10c) in the rear end portion 10c of the nozzle pin 10 corresponds to the cross-sectional area of the ejection port 5a. Even if the pressure increases due to foaming of the contents in the discharge space m after the pressing operation of the contents is stopped, the pressure acts in a direction in which the nozzle pin 10 is pressed against the nozzle 5a of the nozzle 5. Therefore, the spout 5a is surely sealed and no dripping occurs. Here, since the spring 13 has a repulsive force that urges the nozzle pin 10 toward the ejection port 5a, the above-described action is reliably achieved.

When a finger is applied to the upper end of the cover 3b and the head main body 3 is pushed downward, the head main body 3 first moves downward with respect to the base 2 within the range of the dimension t. At this time, the lever member 14 The leg portion 14c ₁ is pushed upward by the top wall 2b of the base 2.

Then, as shown in FIG. 3, the arm 14c ₂ is leaning towards to the fulcrum pivot 14b to the sub-chamber m ₁ backward, which in accordance with the tip portion 10a of the nozzle pin 10 is moved away from the ejection port 5a of the nozzle 5 the The spout 5a opens.

After the head body 3 stops moving relative to the base 2, if the head body 3 is further pushed in, the stem 1 connected to the base 2 is pressed, and the contents discharged from the stem 1 are passed through the passages r and r _1. Then, it ejects from the ejection port 5a of the nozzle 5 toward the outside through the discharge space m.

  In order to stop the ejection of the contents, it is only necessary to remove the force applied to the head main body 3, and the head main body 3 returns to the initial position.

FIG. 4 shows the end of the body portion 10b of the nozzle pin 10 and a plurality of stepped fins 10b ₂ (in the example shown, shown as four arranged at intervals of 90 °). Another embodiment of the ejection head according to the present invention, in which a cylindrical body having a tapered trapezoidal cross-sectional shape toward the nozzle 5 is arranged as the seal member 11, is shown.

The seal member 11 has a front end portion 11a slidably fitted to the rear end portion 10c of the nozzle pin 10 to maintain the discharge space m in a liquid-tight state, and a flange 11b provided at the rear end thereof is adapted to the partition wall 7. It is intended to fix and hold the sealing member 11 itself partition wall 7, a spring 13 for elastically supporting the nozzle pin 10 is disposed between the mutually stepped portions and the flange 11b of the fin 10b _2.

Is smaller than the cross-sectional area S ₁ of the distal end portion 10a of the cross-sectional area S of the seal portion corresponds to the cross-sectional area of the ejection port 5a at the rear end portion 10c of the even nozzle pin 10 in the ejection head according to the above configuration, the pressing operation After the stop, the nozzle pin 10 immediately moves toward the nozzle 5a of the nozzle 5 and the nozzle 5a is sealed, so that no dripping occurs due to the foaming of the contents.

FIG. 5 is a modification of FIG. In this example, a cylindrical seal member 11 having substantially the same opening size at the front end portion 11a and the opening size at the rear end portion is arranged to maintain the discharge space m in a liquid-tight state, and the rear end portion 10c of the nozzle pin 10 is used. the are those constituted by two of the large diameter portion 10c ₁ and the small-diameter portion 10c _2, in this case, the large diameter portion 10c ₁ of the rear end portion 10c functions as a seal portion.

FIG. 6 shows still another embodiment of the ejection head, which is a reference example for explaining the present invention. In this example, an annular step 15 is provided at the boundary between the body portion 10b and the rear end portion 10c of the nozzle pin 10, a recess 16 is formed in the rear end portion 10c, and the seal member 11 is disposed directly in the recess 16. Is.

In the ejection head having the above-described configuration, the spring 13 is disposed between the step 15 and the cylinder 7a to elastically support the nozzle pin 10, and the seal member 11 is located inside the cylinder 7a of the partition wall 7 as the nozzle pin 10 moves. Slide on. Also in this case, the tip end portion 10a in which the cross-sectional area S of the seal portion in the rear end portion 10c of the nozzle pin 10 (the cross-sectional area S in this case is the cross-sectional area including the seal member 11) corresponds to the cross-sectional area of the jet port 5a. since the is smaller than the cross-sectional area S _1, the pressure also increasing pressure by foaming or the like of the contents in the discharge space m becomes to act in the direction to press the nozzle pin 10 to spout 5a of the nozzle 5 .

  The ejecting heads shown in FIGS. 4 to 6 are for ejecting the contents in the same procedure as the ejecting head shown in FIG. 1. Here, the specific operation procedure for the ejecting heads shown in FIGS. Is omitted.

  The rear end portion 10c of the nozzle pin 10 is shown as a cylindrical body having the same shape in the range from the body portion 10b to the end portion 10d, but if the function as a seal portion can be effectively exhibited, You may provide the part which changed the cross-sectional area continuously or intermittently.

  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, this point is not limited.

  Even if the internal pressure rises due to foaming or the like of the contents, it is possible to provide a jet head that can reliably match the nozzle pin with the jet port and avoid the occurrence of dripping.

It is the figure which showed embodiment of the ejection head which is a reference example for demonstrating this invention. It is an external appearance perspective view of a lever member. FIG. 2 is a diagram showing an operating state of the ejection head shown in FIG. It is the figure which showed other embodiment of the ejection head according to this invention. FIG. 5 is a view showing a modified example of FIG. It is the figure which showed other embodiment of the ejection head which is a reference example for demonstrating this invention .

Explanation of symbols

1 stem
2 base
2a Perimeter wall
2b sky wall
2c Lower cylinder
2d upper tube
3 Head body
3a wall
3b cover
4 opening
5 nozzles
5a spout
5b Guide
6 Horizontal partition wall
7 Bulkhead partition
7a cylinder
8 cylinder
9 Through hole
10 Nozzle pin
10a Tip
10b Body part
10b ₁ hull
10c Rear end
10d end
11 Seal material
12 Holding member
13 Spring
14 Insulator material
14a base
14b Axis
14c lever
14c ₁ leg
14c ₂ arms
15 steps
16 recess
r passage
r ₁ passage
m Discharge space
m ₁ subroom
n Notch

Claims (1)

A base having a passage connected to the stem of the container and movable in accordance with the movement of the stem; a head body slidably held in the base and having a discharge space for contents therein; and It is elastically supported so as to be slidable along the axis in the discharge space, and the nozzle outlet is opened by sliding backward as the head body is pushed in, and the contents in the container are transferred to the outside through the stem and discharge space. An ejection head provided with a nozzle pin for ejecting
The nozzle pin is adapted to the nozzle outlet and has a body portion having a tip portion that seals the nozzle outlet, and is connected to the body portion to be slidably linked with the seal member so that the discharge space is maintained in a liquid-tight state. A rear end portion having a sealing portion to
The seal member is formed in a cylindrical shape including a front end portion that is slidably fitted to the seal portion, and a flange portion that is provided at a rear end of the seal member and is fixedly held to the partition wall of the discharge space.
The jet head according to claim 1, wherein the seal portion has a cross-sectional area equal to or smaller than a cross-sectional area of a tip portion.

Images