JPS6335813Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small liquid injection device that is attached to a container or the like and injects a liquid such as milky lotion in a substantially fixed amount.In particular, the nozzle hole is plugged in the nozzle pipe protruding from the injection head. It is an object of the present invention to provide a liquid ejection device to which a simple plug member is detachably attached.

Embodiments of the present invention will be described below with reference to the drawings.
In each figure, 1 is a container containing liquid such as emulsion, 2 is a cap-shaped mounting member that is liquid-tightly fitted to the mouth of the container 1 by screwing or fitting.
The upper end surface of this mounting member 2 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 is fixed. The opening at the upper end of the suction pipe 5 forms a valve hole 6, and the valve hole 6 is provided with a suction valve 7 having a tongue-shaped valve portion cut into an elastic material.

On the other hand, in the opening of the mounting member 2, there is a stem 10 fixed to an injection head 9 having a nozzle pipe 8 at the upper end.
is inserted so that it can be moved 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 injection 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 this opening. The discharge valve 1
There are a plurality of protrusions 14 on the inner periphery of the stem 10 above 3, and the stem 10 is prevented from moving upward beyond the protrusions 14.

This type of liquid injection device is well known, so
Briefly explaining its operation, during normal operation, the cylinder 3 is substantially filled with liquid sucked up through the suction valve 7. In this state, when the piston 11 is pushed down through the stem 10 by the injection head 9 against the spring 12, the piston 1
1, the upper end opening is sealed by the discharge valve 13, so the lowering operation increases the hydraulic pressure inside the cylinder 3, and when this hydraulic pressure reaches a specified value, the discharge valve 13 is pushed upward, causing the inside of the cylinder 3 to rise. Liquid is injected outward from the nozzle pipe 8 through the gap between the discharge valve 13 and the stem 10. When the depressing operation is stopped when the liquid in the cylinder 3 is almost injected, the injection head 9, stem 10, and piston 11 are returned to the illustrated state by the spring 12, but on the other hand, when the liquid injection is completed, the inside of the cylinder 3 becomes negative. Since the liquid is pressurized, 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.

Here, in the present invention, in the middle of the nozzle pipe 8,
Its outer surface is recessed to form a mounting recess 16 having downward step portions 15, 15 at the lower ends of both the left and right sides, as shown in FIGS. 2a and 2b. 17, 17 Inward claws 18, 1 at the lower end
A stopper made of an elastic material such as a soft synthetic resin, which is integrally formed with a strap 22 and a downward U-shaped clamping body 19 having a diameter 8 and a flat knob 21 with a short round bar stopper 20 protruding from one side. A member 23 is provided, and the rod stopper 2
0 is pushed into the nozzle hole 24, and the clamping body 19 is elastically pushed into the mounting recess 16, and the claws 18, 18 are engaged with the downward step portions 15, 15 for mounting. Note that both legs 17 of the holding body 19,
17 is formed to be slightly tapered inward to strengthen its clamping force, both ends of the string 22 are made thin to increase flexibility, and the tip of the rod 20 is made tapered to fit into the nozzle hole 24. It makes it easy to push in.

Conventionally, in this type of liquid injection device, the nozzle hole 24 is closed each time it is used in order to prevent the liquid remaining in the nozzle hole after liquid injection from drying and solidifying and causing clogging, or to prevent dust from entering from the outside. A structure is adopted. However, the conventional
In connection with the liquid injection operation, there are many devices that are automatically opened and closed, or are processed and installed inside the nozzle pipe or injection head, making the structure unnecessarily sophisticated and complicated, and therefore prone to failure. It was hot.

According to the present invention, there is no need for any processing or equipment inside the nozzle pipe 8 or the injection head 9, and the simply-shaped plug member 23 made of an elastic material such as soft synthetic resin is sufficient, and the structure is simple. There is no risk of failure, and it can be manufactured at low cost. In addition, attachment to the nozzle pipe 8 and operation of opening and closing the nozzle hole 24 are extremely simple and hassle-free, and since they can be easily attached and detached, they can be replaced at will, and can therefore be applied to ready-made devices. There are advantages that can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of the internal mechanism of the liquid ejection device of the present invention, Fig. 2a is a front view of the nozzle pipe of the device, Fig. 2b is a sectional view taken along line A-A in Fig. 3
The figure is a perspective view of the plug member of the same device. DESCRIPTION OF SYMBOLS 1... Container, 3... Cylinder, 8... Nozzle pipe, 9... Injection head, 23... Plug member.

Claims (1)

[Scope of utility model registration request] In a liquid injection device having a nozzle pipe 8 protruding from an injection head 9, a rod stopper 2 for closing a nozzle hole is used.
0 protrudes from one side, and a U-shaped clamping body 19 that is elastically clamped to the outer surface of the nozzle pipe 8.
A liquid ejection device comprising a plug member 23 made of an elastic material such as a soft synthetic resin, which is provided at both ends of a strap 22.