JPS6242667B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a triggered liquid ejector.

Many trigger-type sprayers have been known in the past as a type of trigger-type liquid ejector, but unlike vertical reciprocating pump-type manual sprayers, a built-in pump is actuated by operating the trigger. In order to prevent the disadvantage that the structure of the atomizer, mainly the pump mechanism, becomes complicated, and the mist becomes coarse due to a drop in the spray pressure, we use a pressure accumulation type, in other words, only high-pressure liquid above a certain pressure passes through the discharge valve. It was difficult to create a structure where the spray could be sprayed.

The present invention eliminates these drawbacks and also provides a nozzle cap fitted to the front end of the injection cylinder so that the liquid discharge path can be opened and closed by turning the cap. The trigger-type liquid ejector of the present invention can also be used as a sprayer to eject liquid by slightly changing the liquid ejection path in the portion related to the nozzle cap.

To explain the drawings below, 1 is a container body for storing liquid, 2 is a neck part of the container body, and the lower end of the grip forming the main body of a trigger type liquid ejector is removably fitted into the neck part. It has been combined.

The main body of the trigger-type liquid ejector includes a grip portion 11
and an injection barrel 51 that protrudes horizontally forward from the upper end of the grip portion, and a trigger 40 is positioned below the injection barrel with its base end pivotally attached to a part of the main body. be. The pivot position of the proximal end of the trigger is not limited to the front lower surface of the injection tube as shown in the figure, but by bending the trigger, it can be attached to various positions, such as the base end of the injection tube, as seen in the conventional example. It can be set at the top, etc.

In the illustrated example, the gripping portion 11 includes a mounting cap 12, a suction valve forming member 15, and a main member 29.
It is made up of a triple tube that hangs down from the bottom surface of the base.

The mounting cap 12 is formed by hanging a peripheral wall 13 which is screwed onto the mouth and neck of the container from the peripheral edge of a top wall 14 which has a large opening in the center and leaves only the peripheral edge. The suction valve forming member 15 is
It has a top wall 16 whose peripheral edge can be placed on the top surface of the mouth of the container, and a cylindrical portion 17 that fits into the inner surface of the neck of the container's mouth is vertically provided from the lower surface of the top wall. A fitting tube 18 is inserted through the opening in the top wall and projects upward. The top wall periphery engages the underside of the mounting cap top wall 14. Furthermore, a passage tube 19 is formed in the center of the top wall, with both ends protruding in the vertical direction. A valve seat plate 20 is formed on the inner surface of the upper part of the passage cylinder, and has an inward flange shape and the upper surface side is a valve seat for a ball valve.The inside of the passage cylinder above the valve seat plate is used as a valve chamber. A suction valve 22 is formed by inserting a ball valve 21 into the hole. The upper end of a suction pipe vertically disposed within the container body is fitted into the passage cylinder below the valve seat plate. Further, a through hole 24 for sucking outside air is bored in the top wall portion between the passage tube 19 and the fitting tube 18. Of the triple tubes of the main member 29, the inner tube 25
is fitted between the upper part of the passage cylinder 19 and the fitting cylinder 18, and the middle cylinder 26 is fitted to the outer surface of the fitting cylinder 18. The outer cylinder 27 is continuous with the outer wall of the main member, and has an opening 28 in the lower front half of the outer cylinder.

An injection cylinder 51 is projected forward from above the triple cylinder of the main member 29, and a pump chamber 31 is formed in the inner corner formed by the triple cylinder and the injection cylinder, opening toward the trigger. The opening side of the pump chamber is preferably formed with the cylindrical portion 32 protruding toward the trigger side. A suction port 33 communicating with the inside of the container via the valve chamber is opened in the inner part of the pump chamber, and a discharge port 34 communicating with the injection cylinder hole 52 is opened.

A coil spring 35 is placed in the pump chamber 31, and a piston portion 37 formed at the tip of a piston member 36 is fitted into a cylinder so that suction can be drawn against the bias of the spring. The piston member has a first engaging portion 38 at the base end, and the first engaging portion 38
A second engaging portion 39 having an engaging portion provided on the inner surface of the trigger.
By pulling the trigger 40 toward the grip part 11, the spring 35 is compressed and the piston part is pushed into the back of the pump chamber, and when the trigger is released, the spring's elasticity is released. The piston is pushed back by the repulsive force, and the trigger returns to its original position. A stopper 41 is attached to the proximal end of the trigger, and the stopper contacts the cylindrical portion 32 to determine the position of the trigger when it is not in operation. Note that guide pieces 42, 42 for positioning the coil spring are provided in the inner part of the pump chamber.

A discharge valve 53 is provided inside the injection cylinder hole 52 on the base side. The valve body member 54 of the discharge valve has rod portions 56 and 57 protruding from both left and right outer surfaces of an elastic ring portion 55, and a valve plate 58 is provided at the end of one rod, and an elliptical shape is provided at the end of the other rod. A fixing plate 59 is attached to each. The injection cylinder hole 52 is connected to the pump chamber 31
From the side, there is a small diameter part, a medium diameter part, a large diameter part, and a maximum diameter part, and a stepped part is formed between the small diameter part and the middle diameter part, and the middle diameter part is on the side of the middle diameter part of the small diameter part. A taper is provided to make the diameter larger on the part side, and a protrusion 61 that protrudes toward the middle diameter part is attached to the edge of the stepped part. The valve plate 58 is pressed against the tip of the protrusion to fit the valve body member 54 into the middle diameter portion, but as shown in FIG. 2, the valve plate 58 has a groove 60 for discharging high-pressure air. It is provided. The valve plate 58 has a smaller diameter than the inner diameter of the middle diameter portion, and an appropriate number of vertical grooves are provided on the inner wall surface of the middle diameter portion. The fitting portion of the fixing plate 59 is formed at the end of the large-diameter side of the medium-diameter portion, and this portion has a slightly larger diameter than the other medium-diameter portions. When the fixing plate is pushed in, the fixing plate is positioned at the corresponding portion. The fixing plate is in close contact with the inner wall surface of the middle diameter portion in the longer diameter direction, but a gap serving as a liquid passage is formed between the fixing plate and the inner wall surface of the middle diameter portion in the shorter diameter direction. At this time, the valve plate is in pressure contact with the protrusion 61, and only the groove 60 is open.

Inside the large diameter portion, the rear portion of the cylindrical portion of the plug member 62 is fitted into a cylinder. The rear end of the cylindrical portion is brought into pressure contact with the valve body member fixing plate. The plug member 62 has an inward flange 65 with an appropriate number of orifices 64 protruding from the front inner surface of a cylindrical portion 63, and a plug body 66 protruding from the inner peripheral edge of the inward flange. The plug body is preferably located within the cylindrical portion in front of the inward flange. A groove 67 with deep ends at both ends is provided in the diametrical direction of the front end surface of the plug body 66, and a deep groove 67 is provided at the edge of the front end surface of the plug body where the diameter line is located at an angle of about 60 degrees from the groove.
8,68 are provided. As shown in FIGS. 4 and 5, these grooves and deep grooves are provided at appropriate depths in the front part of the plug.
These grooves and deep grooves communicate with grooves provided on the inner surface of the inner circumferential wall of the nozzle cap, which will be described later, to form a part of the discharge passage.
The depth of the deep groove is determined in relation to the length of the groove provided in the inner circumferential wall of the nozzle cap.

A nozzle cap 69 is rotatably fitted to the front end of the injection cylinder. The nozzle cap has an outer circumferential wall 72 that projects rearward from the periphery of a front end wall 71 having a nozzle hole 70 in the center and is fitted onto the outer surface of the front end of the injection cylinder, and a nozzle is formed on the axial extension line from the rear surface of the front end wall. An inner circumferential wall 73 in which holes are positioned and fitted onto the outer surface of the plug body projects rearward. From the rear surface of the front end wall between these inner and outer peripheral walls, an intermediate peripheral wall 74 fitted into the inner surface of the front end of the injection tube 51 and the outer surface of the front end of the cylinder part of the plug member 62 may protrude rearward. Further, in the illustrated example, the front face shape of the front end wall is triangular, and a peripheral wall 75 having a triangular cross section that is continuous with the outer peripheral wall 72 partially projects rearward. Engagement ridges are provided on the outer surface of the injection cylinder and the inner surface of the outer circumferential wall, and the engagement of these engagement ridges prevents the nozzle cap from coming off the injection cylinder. Grooves 76 are provided on the inner surface of the rear half of the inner peripheral wall of the nozzle cap. As mentioned earlier, the grooves include the groove 67 of the stopper and the deep grooves 68, 68.
A single unit is provided on the upper and lower sides of the inner surface of the inner circumferential wall. As shown in FIG. 6, a spin groove 77 for imparting rotation to the discharged liquid is provided in the rear surface portion of the front end wall surrounded by the inner circumferential wall 73.
is provided with a nozzle hole located at the center of the groove.

By rotating the nozzle cap 69, the seventh
As shown in the figure, the groove 76 on the inner circumferential wall of the nozzle cap
When the deep groove 68 of the stopper and the spin groove 77 are communicated with each other, and the trigger 40 is pulled toward the grip portion 11, the piston portion 37 is pushed into the pump chamber, and at this time, the suction valve 22 and the discharge valve 53 is closed, so the pressure inside the pump chamber becomes high. With air in the pump chamber, the high pressure air is exhausted through the groove 60 in the valve plate 58. Next, when the trigger is released, the piston part is pushed back by the repulsion of the spring, and the pressure inside the pump chamber becomes negative, so the suction valve opens and the liquid inside the container is sucked into the pump chamber. Next, when the trigger is pulled, the discharge valve opens due to the elastic deformation of the elastic ring due to the high pressure of the liquid inside the pump, and the high-pressure liquid passes through the discharge valve and then through the orifice 64, into the groove 76, and into the deep groove 68. , passes through the spin groove 77 and is ejected from the nozzle hole 70. The ejected liquid passes through the spin groove and is spouted out while rotating at high speed, so that it is ejected as a mist. When the trigger stops, the piston part also stops, but at the same time the high pressure in the pump chamber is resolved, the discharge valve 53
closes and immediately stops spraying.

As mentioned above, the groove 76 in the inner circumferential wall of the nozzle cap
When the deep groove 68 of the stopper and the spin groove 77 are communicated, water is sprayed, but it is also possible to spray water in a water gun shape without spraying. in this case,
Groove 76 on the inner peripheral wall of the nozzle cap as shown in Figure 1.
The groove 67 of the stopper body may be communicated with the groove 67 of the stopper body. In this case, since the liquid is ejected from the nozzle hole through the groove 67 of the stopper, no spin is applied, and therefore the liquid is ejected without being atomized.

Turn the nozzle cap further to align the groove 76 on the inner circumferential wall of the nozzle cap, the groove 67 on the stopper, and
When the communication between the deep groove 68 and the deep groove 68 is cut off, the liquid inside the pump is not discharged. Therefore, the trigger cannot be pulled either.

The decrease in liquid due to the liquid jetting should create a negative pressure inside the container, but this negative pressure normally occurs when the piston part 37 is pushed deeply into the pump chamber by pulling the trigger. The gap provided between the fitting cylinder 18 of the suction valve forming member 15 and the inner cylinder 25 of the main member is inserted through the through hole 32a for outside air intake, which is bored in the wall of the pump chamber where the piston is located. The outside air enters the container body through the outside air suction hole 24 formed in the top wall of the suction valve forming member, thereby preventing the pressure from becoming negative. The outside air intake passage is an outside air intake through hole 32a that opens into the pump chamber when the piston is in the non-operating position.
Since the atomizer is shielded from the outside air by the piston, even if the atomizer falls over, liquid will not leak from the passage.

The present invention has the above-mentioned structure, and a pump chamber 31 that opens toward the trigger side is provided at the inner corner of the gripping portion and the injection cylinder, and the piston portion at the tip of the piston member 36 is slidably fitted into the chamber. At the same time, the first engaging part 38 provided at the base end of the piston member and the second engaging part 39 provided on the inner surface of the trigger are engaged, so that the operation of the piston part by pulling the trigger is effortless and easy. Since a spring is inserted to push back the piston member, the spring does not get in the way, and in this way, a pump chamber is formed in the inner corner and the piston part and spring are inserted into the chamber. This eliminates the need for the outside diameter of the grip or the injection cylinder to become larger or longer than necessary, which would be the case if a pump mechanism was installed inside the grip or the injection cylinder. The entire device can be made smaller. In addition, if the discharge valve is elastically closed so that it is opened by high-pressure liquid, it is difficult to exhaust the air inside the pump chamber and fill the container with liquid when the pump is used for the first time when there is still air inside the pump chamber. However, in the present invention, since the groove 60 is provided as a high-pressure air discharge path, if the trigger is pulled and the pulled state is maintained for a while, the high-pressure air in the pump chamber will be discharged, so the trigger is released and the piston is removed. When the pump chamber is pushed back by the spring, the pressure inside the pump chamber becomes negative and the liquid inside the container is sucked in. In this way, the air in the pump chamber can be easily replaced with the liquid. Further, the nozzle cap 69 is rotatable so that it can be rotated between the outer peripheral surface of the plug and the inner surface of the inner peripheral wall of the nozzle cap, and between the front end surface of the plug and the rear surface of the front end wall of the nozzle cap surrounded by the inner peripheral wall. Since a communicating discharge flow path is formed through alignment, a safety device for liquid jetting can be provided, which is convenient.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a trigger type liquid ejector according to the present invention, Fig. 2 is a rear view of the valve body member, Fig. 3 is a front view of the plug member, and Fig. 4 is an arrow drawn from Fig. 3. Figure 5 is a sectional view of the main part taken along the line in Figure 3 in the direction of the arrow, Figure 6 is a rear view of the nozzle cap, and Figures 7 and 8 are the main parts respectively. In the enlarged sectional views, FIG. 7 shows a state in which the nozzle cap is aligned in a sprayable state, and FIG. 8 shows a state in which the nozzle cap is aligned in a state in which liquid cannot be ejected. DESCRIPTION OF SYMBOLS 1... Container body, 11... Grip part, 12... Mounting cap, 15... Suction valve forming member, 22...
... Suction valve, 29 ... Main member, 31 ... Pump chamber, 36 ... Piston member, 40 ... Trigger,
51... Injection cylinder, 53... Discharge valve, 54... Valve body member, 62... Plug member, 69... Nozzle cap.

Claims (1)

[Claims] 1 A main body is formed by a grip part 11 whose lower end is removably fitted to the mouth and neck of a liquid storage container, and an injection tube 51 which projects horizontally from the upper end of the grip part. A trigger 40 is positioned below the injection tube with its base end pivotally attached to a part of the main body, and when the trigger is operated, a pump mechanism provided inside the main body is actuated to pump the liquid inside the container to the nozzle hole at the front end of the injection tube. 70
In the trigger-type liquid ejector provided to eject liquid from the inside, a suction port 33 that opens toward the trigger and communicates with the inside of the container on the inner wall surface is provided at the inner corner of the gripping portion and the ejection tube, and communicates with the injection tube hole. A pump chamber 31 is provided with a discharge port 34 opened, a coil spring 35 is installed inside the chamber, and a piston portion 37 formed at the tip of the chamber is arranged to resist the bias of the coil spring. The piston member 36 is provided by fitting the first engaging part 38 formed at the proximal end with the second engaging part 39 provided on the inner surface of the trigger, and also by engaging the first engaging part 38 formed at the proximal end with the second engaging part 39 provided on the inner surface of the trigger. There is a suction valve 22 in the liquid path up to the mouth.
A discharge valve 53 with a high-pressure air discharge passage and opened by high-pressure liquid is provided on the injection cylinder hole side, respectively.
Further, in the front part of the injection cylindrical hole 52, a cylindrical part 63 was fitted into the inner surface of the cylindrical hole, and a plug body 66 was made to protrude from the inner peripheral edge of an inward flange 65 with an orifice 64 that protruded from the inner surface of the cylindrical part. A plug member 62 is provided,
The outer surface of the injection cylinder has an outer circumferential wall 72 projecting rearward from the outer periphery of the front end wall 71 having a nozzle hole 70 in the center, and the outer surface of the plug body has an inner circumferential wall 73 projecting rearward from the rear surface of the front end wall. A nozzle cap 69 that is movably fitted is provided between the outer peripheral surface of the plug part and the inner peripheral surface of the inner peripheral wall, and between the front end surface of the plug part and the rear part of the front end wall surrounded by the inner peripheral wall. This trigger-type liquid ejector is characterized by having a discharge flow path from the orifice to the nozzle hole that communicates with each other through alignment.