JPH0415315Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a trigger type liquid ejector.

[Conventional technology]

Conventional trigger-type liquid ejectors include, for example, the one shown in Japanese Unexamined Patent Publication No. 57-59660 (FIG. 6). That is, the main body part 82 includes a grip part 80 and an injection cylinder 81 that protrudes horizontally from the upper end of the grip part 80, and the main part 82 has a proximal end pivotably attached to the injection cylinder 81. A trigger 83 is provided below, and a pump chamber 85 having a piston member 84 actuated by the trigger 83 is provided at an inner corner between the grip portion 11 and the injection barrel 81. Furthermore, the main body part 82
A nozzle cap 86 is rotatably attached to the injection cylinder 81, and this nozzle cap 86
By rotating the trigger 83, the liquid sucked up through the trigger 83 is ejected from the nozzle hole, and the liquid is prevented from leaking when the trigger 83 is not activated.

[Problem that the invention attempts to solve]

However, in this type of trigger-type liquid ejecting device, the nozzle cap 86 is closed and the trigger 83 is malfunctioned.
When the pressure in pump chamber 8 is increased, this ultra-high pressure
The injection cylinder 81 communicating with 5 is pressurized,
As a result, there is no place for this ultra-high pressure to escape, causing problems such as blowing off the nozzle cap 86 rotatably attached to the end of the injection tube 81 and destroying the valve body member inside the injection tube 81. It was hot.

The present invention has been developed in view of the above-mentioned points. When the trigger malfunctions and ultra-high pressure is applied to the pump chamber when the nozzle cap is closed, the present invention relieves this pressure and closes the nozzle cap. A technical problem is to obtain a trigger-type liquid ejector that can be prevented from being destroyed and is easy to operate.

[Means for solving problems]

The present invention includes a grip portion 11 that is removably fitted into the mouth and neck portion 2 of a liquid storage container 1, and a grip portion 11 that
An injection barrel 51 that protrudes horizontally from
A pump chamber 31 having a piston member 36 that is actuated by The following technical measures were taken in a trigger-type liquid ejector in which the liquid is ejected from the nozzle hole 71 of the nozzle cap 70 and the nozzle hole 71 can be opened and closed by rotating the nozzle cap 70.

That is, as shown in FIG. 1, there is a nozzle cap 7 between the nozzle cap 70 and the container 1.
Leak passage 4 communicated and closed by rotation of 0
Make 3,44. These leak passages 43, 44
The nozzle hole 71 is formed by the rotation of the nozzle cap 70.
When the nozzle cap 70 is closed, it communicates with the nozzle cap 70.
The nozzle hole 71 is closed when the nozzle hole 71 is opened by the rotation of the nozzle hole 71.

[Effect]

Rotate the nozzle cap 70 to open the nozzle hole 71.
Even if the trigger 40 malfunctions and the inside of the pump chamber 31 becomes extremely high pressure when the nozzle cap 70 and the container 1 are closed, the leak passages 43 and 44 formed between the nozzle cap 70 and the container 1 are in communication with each other. The pressure will be reduced through the leak passages 43 and 44. Therefore, the pressure inside the injection cylinder 51 is not increased, and parts such as the nozzle cap 70 can be prevented from being destroyed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numeral 1 denotes a container for storing liquid, and a lower end portion of a grip portion 11 forming a main body of a trigger type liquid ejector is removably fitted into a neck portion 2 of the container 1. The main body part 10 of the trigger-type liquid ejector is formed of a grip part 11 and an injection tube 51 that projects horizontally forward from the upper end of the grip part 11. A trigger 40 is located below the injection barrel 51 which is pivotally mounted. trigger 4
The pivot position of the base end of the 0 is not limited to the front lower surface of the injection tube 51 as shown in the figure, but by bending the trigger 40, it can be attached to various positions, for example, the injection tube 51 as seen in the conventional example. It can be set at the upper part of the proximal end, 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 of the base. This attachment cap 12 is formed by hanging a peripheral wall 13 which is screwed onto the container neck 2 from a top wall 14 with a large opening in the center and leaving only the peripheral edge. The suction valve forming member 15
has a top wall 16 whose peripheral edge can be placed on the top surface of the container mouth, a cylindrical portion 17 that fits into the inner surface of the container neck 2 is vertically disposed from the bottom surface of the top wall 16, and From the top surface, a fitting cylinder 18 is inserted into an opening in the top wall of the mounting cap and projects upward. The top periphery is adapted to engage the underside of the mounting-forming cap top wall 14. Furthermore, a passage tube 19 is formed in the center of the top wall, with both ends protruding vertically through the central portion of the top wall. A valve seat plate 20 is formed on the inner surface of the upper part of the passage cylinder 19, and has an inward flange shape and has an upper surface as a valve seat for a ball valve. A suction valve 22 is formed by inserting a ball valve 21 into the valve chamber. An upper end portion of a suction pipe 23 vertically installed inside the container is fitted into the passage cylinder 19 below the valve seat plate 20. Further, in the top wall portion between the passage tube 19 and the fitting tube 18, an outside air suction hole 24A and a liquid return hole 24B are formed, respectively. Main member 2
Of the 9 triple cylinders, the inner cylinder 25 is fitted between the upper part of the passage cylinder 19 and the fitting cylinder 18, and the middle cylinder 26 is fitted between the upper part of the passage cylinder 19 and the fitting cylinder 18.
is fitted onto the outer surface of the fitting cylinder 18. Outer cylinder 27
is continuous with the outer wall of the main member 29, and the front lower half of the outer cylinder 27 has an opening 28.

An injection cylinder 51 is inserted from above the triple cylinder of the main member 29.
The triple cylinder and the injection cylinder 51 are shown protruding forward.
A pump chamber 31 is formed in the inner corner formed by the pump chamber 31 and is opened toward the trigger 40 . The opening side of the pump chamber 31 is preferably formed by making the cylindrical portion 32 protrude toward the trigger side. A suction port 33 that communicates with the inside of the container 1 via the valve chamber is opened in the inner part of the pump 31, and an injection cylinder hole 5 is opened.
2 is opened.

Inside the pump chamber 31 is a coil spring 3.
5 is disposed, and a piston portion 37 formed at the tip of a piston member 36 is fitted so as to be pushable against the biasing force of this spring.
This piston member 36 has a first engaging portion 38 at its base end.
This first engaging portion is engaged with a second engaging portion 39 provided on the inner surface of the trigger, and by pulling the trigger 40 toward the grip portion 11, the spring 35 is compressed. When the piston section 37 is pushed into the inner part of the pump chamber 31, and when the trigger 40 is released, the piston section 37 is pushed back by the biasing force of the spring 35, and the trigger 40 returns to its original position. It is set in. Furthermore, trigger 40
A stopper 41 is attached to the base end of the trigger 40, and the stopper 41 comes into contact with the cylindrical portion 32, thereby determining the position of the trigger 40 when the trigger 40 is not operated. In addition, a guide piece 4 for positioning the coil spring 35 is provided in the inner part of the pump chamber 31.
2,42 are provided.

Leak passages 43 and 44 are formed in the grip portion 11 and the injection barrel 51, and these leak passages 43 and 44 communicate between the nozzle cap 70 and the container 1. It can be freely communicated and closed by rotating it.

A discharge valve 53 is disposed inside the base side of the injection cylinder hole 52.
is provided. Valve body member 5 of the discharge valve 53
4 has rod portions 56 and 57 protruding from both left and right outer surfaces of the elastic ring portion 55, and a valve plate 58 is attached to the end of one rod, and an elliptical fixing plate 59 is attached to the other rod. It has been added. The injection cylinder hole 5
2 has a small diameter part, a medium diameter part, a large diameter part, and a maximum diameter part from the pump chamber 31 side, and a step part is formed between the small diameter part and the middle diameter part, and the middle diameter of the small diameter part is The side portion is tapered such that the diameter is larger on the middle diameter side, and the edge of the stepped portion is provided with a protrusion 61 that projects toward the middle diameter side. The valve plate 58 is pressed against the tip of the protrusion 61 and the valve body member 54 is pushed into the middle diameter portion.
The valve plate 58 is provided with a groove (not shown) for discharging high-pressure air.
The valve plate 58 has a smaller diameter than the inner diameter of the middle diameter portion,
An appropriate number of vertical grooves are provided on the inner wall surface of the medium 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 59 is pushed in, the fixing plate 59 comes into close contact with the inner wall surface of the middle diameter portion in the long axis direction, but a gap as a liquid passage is formed between the fixing plate 59 and the inner wall surface of the middle diameter portion in the short axis direction. There is. At this time, the valve plate 58 is in pressure contact with the protrusion 61, and only the groove is open.

The rear portion of the plug member 62 fits within the large diameter portion. 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 the cylindrical portion 63, a plug body 66 protruding from the inner periphery of the inward flange 65, and a cylindrical body 67 from the outer periphery. The cylindrical body 67 is made to protrude, and a cut groove 68 is provided at an arbitrary location on the cylindrical body 67. The plug body 66 is preferably located in the cylindrical portion in front of the inward flange 65. Plug body 66
In the diametrical direction of the front end surface of the
9A, and a deep groove 6 is provided at the edge of the front end surface of the plug, where the diameter line is located at an angle of about 60 degrees from the groove 69A.
9B is provided. These deep grooves 69B are provided at an appropriate depth in the front part of the stopper. These deep grooves are
It communicates with grooves provided on the inner surface of the inner circumferential wall of the nozzle cap 70, which will be described later, to form a part of the discharge passage.To be precise, the depth of these deep grooves is equal to the length of the groove provided on the circumferential wall of the nozzle cap 70. It will be determined based on the relationship between

A nozzle cap 70 is rotatably fitted to the front end of the injection cylinder 51, and the nozzle cap 70 has a front end wall 72 having a nozzle hole 71 in the center.
An outer circumferential wall 73 fitted to the outer surface of the front end of the injection cylinder 51 is projected rearward from the periphery of the injection tube 51, and a nozzle hole 71 is positioned on the axial extension line from the rear surface of the front end wall and fitted to the outer surface of the plug body. An inner circumferential wall 74 projects rearward. A cut groove 7 is provided at an arbitrary location on this inner peripheral wall 74.
5 is formed, and this kerf 75 is similar to the kerf 6.
8 and when the nozzle cap 70 is closed, the liquid is returned to the container 1 through the leak passages 43 and 44. From the rear surface of the front end wall between these inner and outer peripheral walls, the front end inner surface of the injection cylinder 51 and the plug member 62 are visible.
The middle circumferential wall 76 fitted to the outer surface of the front end of the cylindrical portion may protrude rearward. Furthermore, in the illustrated example, the front end wall has a triangular overall shape, and a part of the outer peripheral wall 73
A circumferential wall 77 having a triangular cross-section and continuous with the rear wall 77 is made to protrude rearward. Incidentally, engagement ridges are provided on the outer surface of the injection tube 51 and the inner surface of the outer circumferential wall, and the engagement of these engagement ridges prevents the nozzle cap 70 from separating from the injection tube 51. Grooves 78 are provided on the inner surface of the rear half of the inner circumferential wall of the nozzle cap 70, and these grooves 78 communicate alternately with the grooves 69A and deep grooves 69B of the stopper. Each is provided in singular form. A spin groove 79 for imparting rotation to the discharged liquid is provided on the rear surface of the front end wall surrounding the inner peripheral wall 74.
A nozzle hole 71 is located at the center of 9.

By rotating the nozzle cap 70,
The groove 78 on the inner circumferential wall of the nozzle cap 70, the deep groove 69A of the stopper, and the spin groove 79 are made to communicate with each other,
When the trigger 40 is pulled toward the grip portion 11, the piston portion 36 is pushed into the pump chamber 31 against the urging force of the coil spring 35, and at this time, the suction valve 22 and the discharge valve 53 are closed. Therefore, the pressure inside the pump chamber 31 becomes high. When air is in the pump chamber 31, this high pressure air is
It is discharged from the groove of the valve plate 58. Next, trigger 40
When released, the piston part 36 is pushed back by the biasing force of the coil spring 35, and the pump chamber 3
Since the pressure inside the container 1 becomes negative, the suction valve 22 opens and sucks the liquid inside the container 1 into the pump chamber 31. Next, when the trigger 40 is pulled, the pressure of the liquid in the pump chamber 31 increases, and the discharge valve 53 opens due to the elastic deformation of the elastic ring, and the high-pressure liquid passes through the discharge valve 53 and then through the orifice 64. groove 78, groove 69
A: It passes through the spin groove 79 and is ejected from the nozzle hole 71. The ejected liquid passes through the spin groove 79 and is ejected while rotating at a high speed, so that it is ejected as a mist {see FIGS. 3A and 3B}. trigger 4
0, the piston part 36 also stops, but at the same time the high pressure in the pump chamber 31 is eliminated, the discharge valve 53 also stops.
closes and immediately stops spraying.

As described above, when the groove 78 on the inner circumferential wall of the nozzle cap 70, the deep groove 69A of the stopper, and the spin groove 79 are made to communicate with each other, water is sprayed, but water is not sprayed but is ejected in the shape of a water gun. You can also do it. In this case, the groove 78 in the inner circumferential wall of the nozzle cap 70 and the groove 69B in the stopper may be communicated with each other as shown in FIGS. 4A and 4B. In this case, since the liquid is ejected from the nozzle hole 71 through the groove 69B of the stopper,
No spin is applied, and the liquid is ejected without being twisted and atomized.

Furthermore, as shown in FIGS. 1 and 2, turn the nozzle cap 70 to align the groove 78 on the inner circumferential wall of the nozzle cap 70, the groove 69A on the stopper, and the deep groove 69.
If the communication with B is cut off, the liquid in the pump chamber 31 will not be discharged. Therefore, the trigger 40 also cannot be pulled. However, at this time, due to a malfunction, the trigger 40 is pulled and the pump chamber 31 is closed.
When the pressure inside the injection tube 51 is increased, this increase in pressure causes the injection tube 51 to
The discharge valve 53 is opened, and the plug member 62, the groove 75,
68 and the container 1 via the leak passages 43 and 44.
The inside of the pump chamber 31 is depressurized. As a result, when the nozzle cap 70 is closed, the trigger 40
Even if the pump chamber 31 is operated, the pressure inside the pump chamber 31 does not become extremely high.

Moreover, the inside of the container 1 becomes negative pressure due to the decrease of liquid due to liquid jetting, but this negative pressure is caused by
When the piston part 36 is pushed deeply into the pump chamber 31 by pulling the trigger 40, air is drawn through a through hole 32a for inhaling outside air, which is bored in the wall surface of the pump chamber part where the piston part 37 is normally located. It passes through the gap provided between the fitting cylinder 18 of the suction valve forming member 15 and the inner cylinder 25 of the main member, and further passes through the open air intake hole 24 bored in the top wall of the suction valve forming member. By allowing outside air to enter the container 1, negative pressure is prevented. Note that the outside air intake passage is connected to the pump chamber 31 when the piston portion 36 is in the non-operating position.
The outside air suction hole 32a that opens to the piston portion 3
6, so even if the atomizer falls over, there will be no leakage of liquid from the passage.

FIG. 5 shows another embodiment of the trigger-type liquid ejector of the present invention, which has a second embodiment between the fitting cylinder 18 and the passage cylinder 19 of the top wall 16 of the suction valve forming member 15. In addition to providing a fitting cylinder 18A, the inner cylinder 25 of the main member 29 is divided to form a second inner cylinder 25A, and the inner cylinder 25 is connected to the passage 19 and the second fitting cylinder 1.
8A, and the second inner cylinder 25
A is fitted between the second fitting cylinder 18A.
The outside air intake through hole 24A and the through hole 32A are connected by a passage formed by the inner tube 25, the second fitting tube 18A, and the second inner tube 25A. On the other hand, the end portion of the passage is formed by the second inner cylinder 25A, the middle cylinder 26, the second fitting cylinder 18A, and the fitting cylinder 18, and communicates with the through hole 24B. Both passages are provided independently, and the liquid in the passage is returned to the container 1, and the outside air suction hole 32a
This prevents liquid from leaking. Other configurations and operations are similar to those of the embodiment shown in FIGS. 1 to 4A and 4B, so detailed explanation thereof will be omitted.

[Effect of idea]

The present invention provides that when the nozzle cap is closed,
When the trigger is pulled due to malfunction and the pump chamber is pressurized, the pressure is supplied into the plug member by opening the valve member, and into the container through the hole in the cylinder and the passage in the injection cylinder, Since the pressure in the pump chamber is reduced, it is possible to prevent the pressure inside the injection cylinder from becoming extremely high and to prevent parts such as the nozzle cap from being destroyed. As a result, the container can withstand long-term use, and the liquid in the container can be used effectively. Moreover, the structure is extremely simple and the product can be supplied at low cost, which is an excellent advantage.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the trigger type liquid ejector of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3A is a sectional view showing the spray state of the nozzle cap portion. Figures 4 and B are sectional views taken along the same line, Figure 4 A is a sectional view showing the water gun state of the nozzle cap, Figure B is a sectional view taken along the same line, and Figure 5 is another embodiment of the trigger type liquid sprayer. FIG. 6 is a longitudinal sectional view showing a conventional example. 1... Container, 2... Mouth and neck, 11... Gripping part,
31...Pump chamber, 36...Piston section, 40...
...Trigger, 43, 44...Leak passage, 51...
...Injection tube, 70...Nozzle cap.

Claims (1)

[Claims for Utility Model Registration] A grip part 11 that is removably fitted into the mouth and neck part 2 of the liquid storage container 1, an injection tube 51 that projects horizontally from the grip part 11, and the grip A pump chamber 31 having a piston member 36 provided at the inner corner of the part 11 and the injection cylinder 51 and actuated by the trigger 40, and a nozzle cap 70 rotatably provided at the tip of the injection cylinder 51, In the trigger type liquid ejector, the pump mechanism is operated by operating the trigger 40 to eject the liquid in the container from the nozzle hole 71 of the nozzle cap 70, and the nozzle hole 71 can be opened and closed by rotating the nozzle cap 70. , Leak passages 43 and 44 are formed between the nozzle cap 70 and the container 1, which communicate and close when the nozzle cap 70 rotates. A trigger type liquid sprayer characterized in that it communicates when closed and closes when a nozzle hole 71 is opened by rotation of a nozzle cap 70.