JPS63376Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a small liquid ejection device that is attached to a container or the like and injects a relatively high viscosity liquid such as milky lotion in a substantially fixed amount at a time, and is particularly attached to a jetting head. It is an object of the present invention to provide a liquid ejecting device equipped with a clogging prevention mechanism that prevents clogging of a nozzle hole at the tip of a nozzle pipe.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a container containing a liquid such as milky lotion, and 2 is an attachment member such as a cap that is liquid-tightly fitted to the mouth of the container 1 by screwing or fitting. The end face is opened to a small diameter. A vertically long cylindrical cylinder 3 whose upper end is fixed to the inner wall of the mounting member is suspended within the mounting member 2, and a small diameter bottom 4 at the lower end of the cylinder 3 is a suction pipe suspended in the liquid. 5 The upper end is fixed. The opening at the upper end of the suction pipe 5 forms a valve hole 6, and this valve hole 6 is closed by a suction valve 7 having a tongue-shaped valve portion cut into a flexible plate.

On the other hand, in the opening of the mounting member 2, there is a stem 10 fixed to an ejection head 9 having a nozzle pipe 8 at the upper end.
is inserted so that it can move up and down. The lower end of the stem 10 inside the mounting member 2 is enlarged in diameter, and this enlarged diameter portion prevents the stem 10 from slipping out of the mounting member 2. A cylindrical piston 11 that slides within the cylinder 3 is fixed to the stepped inner surface of the lower end of the stem 10, and a coil spring 12 is inserted between the lower end surface of the piston 11 and the suction valve 7. , this spring 12 is connected to the stem 10 via the piston 11,
The spouting head 9 is constantly pushed upward. Further, a spherical discharge valve 13 is loosely fitted into the upper end opening of the piston 11 to seal the opening. There is a narrow diameter portion 14 in the stem 11 above the discharge valve 13, and the discharge valve 13 is prevented from moving upward beyond this narrow diameter portion 14.

The ejection head 8 is provided with a clogging prevention mechanism 16 that prevents the nozzle hole 15 at the tip of the nozzle pipe 8 from clogging. This clogging prevention mechanism 16
An operating lever 20 is provided in a recess at the top of the head 9, the rear part of which is pivoted by a shaft 17, and the front part of which is engaged with a protrusion 19 on the side of the head 9 from below through a protrusion 18 so as not to come off; Back side of lever 20 and head 9
An elastic body 21 such as a resin spring that is passed between the top surfaces and pushes the operating lever 20 upward, and an elastic body 21 that is coaxially provided in the center of the nozzle pipe 8 and that has a rear part that keeps the vertical frame part 22 of the head 9 liquid-tight. A through hole is inserted through the nozzle hole 15 so as to be movable back and forth, and its rear end is locked to a transmission member 23 which is a rear hanging wall of the operating lever 20, and its tip 24 is inserted into the nozzle hole 15 and passes through the nozzle hole 15. It consists of a hole rod 25.

That is, in the steady state shown in FIG.
0 is pushed down against the elastic body 21, the transmission member 23 is displaced backward and the through-hole rod 25 is pulled back, so that the nozzle hole 15 opens as shown in FIG. When the user stops pressing down the operating lever 20, the elastic body 21 returns the operating lever 20 to the state shown in FIG. 26 is the tsuba.

Next, the operation of the above device will be explained. During normal operation, the tip 24 of the through-hole rod 25 is inserted into the nozzle hole 15, and the cylinder 3 is substantially filled with liquid sucked up through the suction valve 7. To eject liquid in this state, the ejection head 9 is pushed down via the operating lever 20. Then, as described above, the through-hole rod 25 is pulled back and the nozzle hole 15 is opened.
Further, the piston 11 is pushed down through the stem 10 against the spring 12. Since the upper end opening of the piston 11 is sealed by the discharge valve 13, the hydraulic pressure inside the cylinder 3 increases due to the downward movement, and when this hydraulic pressure reaches a specified value, the discharge valve 13 is pushed upward, and the cylinder 3 is closed. The liquid in the discharge valve 3 passes through the gap between the discharge valve 13 and the stem 10, passes through the nozzle pipe 8, and is injected outward from the nozzle hole 15. When the depressing operation is stopped when the liquid in the cylinder 3 is almost injected, the through-hole rod tip 24 is inserted into the nozzle hole 15 again, and the ejection head 9, stem 10, and piston 11 are moved to the first position by the spring 12. Return to figure state. On the other hand, when the liquid injection is completed, the pressure inside the cylinder 3 becomes negative, so that the liquid in the container 1 flows into the cylinder 3 through the suction pipe 5 and the suction valve 7, and one cycle of the injection operation is completed.

In this type of liquid injection device, if the liquid is a highly viscous emulsion or the like, there is a high risk that the liquid will adhere to the nozzle hole 15 during injection and solidify, causing clogging. However, in the present invention, each time liquid is injected, the tip 24 of the through-hole rod passes through the nozzle hole 15 and removes the liquid adhering to the nozzle hole 15 before it solidifies, so that clogging cannot be reliably prevented. can.

3a and 4b and 4a and 4b show other anti-clogging mechanisms 16 having different structures, respectively. In the case of FIGS. 3a and 3b, an elastic material is used as the operating lever 20, and a hinge 27 that is connected to the through-hole rod 25 serves as a transmission member 23 that transmits the downward displacement of the operation lever 20 to the through-hole rod 25. It uses a dogleg-shaped member that is bendable and supported at both ends.

In FIGS. 4a and 4b, the transmission member 23 and the through-hole rod 25 are formed of elastically deformable members, and these two members are integrally connected by a flexible hinge 29, and the transmission member 23 is The top wall of the head 9 is passed through so as to be movable up and down, and the upper end thereof is fixed to the back surface of the operating lever 20. These figures 3 and 4
A similar effect can be expected from the illustrated example.

In each of the above embodiments, a guide member is provided midway inside the nozzle pipe 8, and the guide member guides the through hole rod 25.
It is better to accurately position and advance and retreat.

As described above, in the present invention, the clogging prevention mechanism 16 is attached to the ejection head 9, and each time the liquid is ejected,
Since the prevention mechanism 16 allows the nozzle hole 15 to pass through and removes the liquid adhering to the nozzle hole 15 before it solidifies, clogging of the nozzle hole 15 can be reliably prevented. Moreover, this clogging prevention operation is not performed separately, but the liquid injection operation immediately becomes the clogging prevention operation, so there is no operational hassle. Since it is formed in a shape that follows the head 9, there are no protruding or significantly deformed parts, and its external shape is compact.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of the essential parts of an embodiment of the liquid ejection device of the present invention, Fig. 2 is a longitudinal sectional view of the ejection head and clogging prevention mechanism for explaining the operation of the same embodiment, and Fig. 3 FIGS. 4A and 4B are vertical cross-sectional views showing different clogging prevention mechanisms, with each figure A being a view during normal operation and each figure B being a view during liquid injection. DESCRIPTION OF SYMBOLS 1... Container, 8... Nozzle pipe, 9... Ejection head, 16... Clogging prevention mechanism.

Claims (1)

[Scope of utility model registration request] A cylinder 3 is installed vertically from the upper inner surface of a mounting member 2 that can be fitted into the mouth of the container, and a stem 1 that passes through the top wall of the mounting member 2 is disposed inside the cylinder 3.
A cylindrical piston 11 attached to the lower end of the stem 10 is fitted, a jetting head 9 with a nozzle pipe 8 is attached to the upper end of the stem 10, and a suction valve 7 is attached to the bottom of the cylinder.
In addition, in a liquid injection device in which a discharge valve 13 is provided in the stem 10 or the cylindrical piston 11, a through-hole rod is provided coaxially in the nozzle pipe 8 and whose tip 24 is inserted into the nozzle hole 15. 25. An operating lever 20 which is disposed upwardly on the outer surface of the top of the ejection head 9 with an elastic body 21 and is pushed down when liquid is ejected; when the operating lever 20 is pushed down, the through-hole rod 25 is moved backward. A clogging prevention mechanism 1 consisting of a transmission member 23 that pulls back and opens the nozzle hole 15.
Liquid injection device with 6.