JPS6238769Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small manual sprayer, and in particular, it is an object of the present invention to provide a small manual sprayer that can adjust the spread of the spray liquid by controlling the presence or absence of rotation just before the spray liquid is ejected. purpose.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a mounting part that is removably attached to the container by screwing or other means, 2 an engagement tube extending upward from the attachment part 1, and 3 a locking part that does not slip out from the engagement tube 2. It is a depressable spray head that is inserted into and guided by it.

This type of sprayer is well known, so to briefly explain the main parts, excluding the main parts, the mounting part 1 is equipped with a vertically long cylinder that hangs downward. A riser pipe is installed vertically. On the other hand, the cylindrical piston that slides up and down within the cylinder has a stem 4 that penetrates through the engagement tube 2 and projects upward to communicate with the spray head 3.
The integral body of the stem 4, piston, and spray head 3 is always urged upward by a spring built into the cylinder, and a suction valve and a discharge valve are provided at the upper end of the suction pipe and the lower end of the stem, respectively. is provided.

With this structure, under normal conditions, the cylinder is filled with the liquid in the container sucked up through the suction pipe, and in this state, the spray head 3 pushes the piston downward against the spring through the stem 4. When lowered, the upper opening of the piston is sealed with a discharge valve, so the lowering action increases the hydraulic pressure inside the cylinder, and when this hydraulic pressure reaches a predetermined value, it pushes up the discharge valve, causing the piston to open up inside the cylinder. The liquid is sprayed outward from the nozzle hole 5 through the gap between the discharge valve and the stem 4 in the form of a mist. When the depressing operation is stopped when the liquid in the cylinder is almost jetted out, the spray head 3, stem 4, and piston return to their original state due to the spring, but on the other hand, when the liquid jetting ends, the inside of the cylinder becomes negative pressure. The liquid in the container flows into the cylinder through the suction pipe and suction valve, completing one cycle of the spraying operation.

In the present invention, an adjustment shaft 6 is threaded through the spray head 3 in the lateral direction, and the spread of the spray liquid from the nozzle hole 5 is adjusted by moving the adjustment shaft 6 back and forth. This point will be explained below.

The adjustment shaft 6 has a large-diameter knob 7 at the rear end, a fine screw 8 on the outer surface toward the rear of the center, and a hollow space 10 around the center corresponding to the liquid path 9 of the stem 4.
Also, a cavity 11 is formed around the tip, and a passage 12 communicating this cavity 11 with the cavity 10 is formed in the axial direction of the outer surface, so that the spray head 3
The high pressure liquid from the stem 4 can be guided to the back of the nozzle hole 5 through the space 10, the passage 12, and the space 11. Note that 13 indicates a liquid leakage prevention rib.

On the other hand, on the back of the nozzle hole member 14 having the nozzle hole 5 in the center, a pair of curved liquid introduction passages 15, 15 are provided as shown in FIG.
It is well known that the high-pressure liquid is rotated by the nozzle 15 and guided to the nozzle hole 5, so that the spray liquid ejected from the nozzle hole 5 is spread appropriately. In the present invention, the pair of liquid introduction passages 15, 15 provided in the nozzle hole member 14 are not hole-shaped but groove-shaped, and when the adjustment shaft 6 is fully screwed as shown in FIG. The tip end face of 6 seals the open faces of the groove-like introduction passages 15, 15 to form a hole-like passage.

With the above configuration, when the adjustment shaft 6 is fully screwed into the spray head 3 as shown in FIG. 1, the pair of liquid introduction passages 15, 15 are hole-shaped, unlike in conventional spray heads. Therefore, in this case, the high pressure liquid flows from the liquid passage 9 of the stem 4 to the cavity 10, the passage 12,
The spray liquid is guided through the cavity 11 to the introduction passages 15, 15, and is ejected from the nozzle hole 5 with a predetermined spread.

If the adjustment shaft 6 is now screwed forward from the state shown in FIG. 1, the tip of the adjustment shaft 6 will move back and
Therefore, the high-pressure liquid from the stem 4 is guided to the nozzle hole 5 from this gap, and in this case, the high-pressure liquid guided to the nozzle hole 5 has no rotation. Therefore, the spread of the spray is reduced, and thereby the spread of the spray liquid can be adjusted to be wide or narrow.

In the embodiment described above, the lateral passage 1 of the spray head 3
A part of the block body in which the nozzle hole member 14 is provided is used as an adjustment shaft 6, and the adjustment shaft 6 is screwed through the nozzle hole member 14 so as to be freely advanced and retracted. However, the purpose can be similarly achieved even if the nozzle hole member 14 is provided so that it can be freely advanced and retracted. FIG. 3 shows an embodiment in this case, in which the nozzle hole member 14 is screwed onto the spray head 3 from the front, the nozzle hole member 14 is rotated with the knob 16 and pulled out to the front side, and the nozzle hole member 14 is pulled out to the front side. A gap is formed between the back surface of the spray head 14 and the front end surface of the block body 17 of the spray head 3.

According to the present invention, the spread of the spray liquid ejected from the nozzle hole 5 can be adjusted to be wide or narrow at will.
It is convenient to use. Moreover, the operation is done through the adjustment axis 6.
Alternatively, the nozzle hole member 14 is simply rotated and moved forward and backward, which is extremely simple. Further, structurally, it is advantageous in terms of manufacturing because only the spray head 3 needs to be improved, and the structure of the adjusting shaft 6 or the nozzle hole member 14 is simple, so it can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a top front view showing the main parts of the small hand-operated sprayer of the present invention in longitudinal section, Fig. 2 is a front view of the nozzle hole member, and Fig. 3 shows the main parts of another embodiment in longitudinal section. FIG. DESCRIPTION OF SYMBOLS 1... Mounting part, 3... Spray head, 5... Nozzle hole, 6... Adjustment shaft, 14... Nozzle hole member.

Claims (1)

[Scope of utility model registration request] The high pressure liquid from the liquid passage 9 of the stem 4 is passed through the lateral passage 12 to the peripheral cavity 11 on the back side of the nozzle hole member 14.
A pair of liquid introduction passages 15, 1 curved in the radial direction from
5, the introduction passages 15, 15 are groove-shaped, and the passage 12
having a tip reaching the back surface of the nozzle hole member 14,
The adjustment shaft 6 whose tip end closes the open faces of the introduction passages 15 and 15 to form a hole-shaped introduction passage is inserted through the adjustment shaft 6 so as to be able to move back and forth in the lateral direction, or the nozzle hole member 14 is inserted from the front side. A small manual sprayer equipped with a spray head 3 that is screwed in so that it can move forward and backward.