JPS6365385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trigger-type sprayer that reciprocates a piston by rotating a trigger, thereby sucking up liquid in a container, pressurizing the liquid, and spraying the liquid.

This type of sprayer includes a sprayer body that is attached to the mouth of the container. Then, three-way (first
(Figure) or two-way (Figure 2) trigger type sprayer. In a three-way trigger-type sprayer (hereinafter referred to as a three-way sprayer), the liquid in the container flows through a suction tube 210 and a primary valve 211 into a vertical channel 212 and then into an inclined channel 214. When the piston in conjunction with the trigger is pushed into the inclined channel 214, the liquid is pressurized and flows into the horizontal channel 216, passes through the secondary valve 217, and is sprayed from the orifice of the nozzle. In contrast, in a two-way trigger type atomizer (hereinafter referred to as a two-way atomizer), the inclined flow path is eliminated and the piston is disposed in a horizontal flow path. In other words, the liquid that has flowed through the suction pipe 210 and the vertical flow path 212 passes through the primary valve 211 and then passes through the horizontal flow path 216.
flows into. The reciprocating movement of the piston pressurizes the liquid, and the pressurized liquid is sprayed through the secondary valve 217 and the orifice.

The cylinder, which together with the piston constitutes the pop-up mechanism, is formed in the inclined flow path (in the case of three-way) or horizontal flow path (in the case of two-way) of the main body of the sprayer. Further, the trigger type is formed separately from the sprayer main body and is rotatably attached to the sprayer main body.

In a three-way sprayer, the direction in which the piston is pushed and the direction in which the pressurized liquid flows do not coincide. In other words, the pressurized liquid flows from the inclined channel to the horizontal channel and the flow direction changes. Therefore, a component of the liquid pressure is transmitted to the atomizer body, creating a pressure drop. Furthermore, this type of sprayer has a disadvantage that it has a complicated structure because of its large number of flow channels, and therefore has a large number of parts, making it difficult to produce at a low cost. On the other hand, in a two-way atomizer, the direction in which the piston is pushed and the direction in which the pressurized liquid flows coincide, so no pressure drop occurs. Two-way sprayers also have a relatively small number of parts and can be produced fairly inexpensively.

However, in actual technological competition, it is required to reduce the number of parts and produce products at low cost.

The object of the present invention is to provide a trigger type sprayer that can be manufactured at extremely low cost by simplifying the structure and reducing the number of parts to the limit. In order to achieve this object, according to the present invention, a portion corresponding to a conventional sprayer body is integrally constructed with the container and becomes a part thereof, and no flow path is formed in the portion corresponding to the sprayer body. The trigger is formed integrally with the cylinder of the pump mechanism and is attached to a portion corresponding to the main body of the sprayer. Furthermore, the nozzle is formed integrally with the trigger. That is, according to the present invention, a one-way trigger type sprayer having only the horizontal flow path 218 formed by the cylinder as shown in FIG. 3 can be provided at low cost.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 4 to 6, a one-way trigger type sprayer 10 according to the present invention includes a pump mechanism 14 attached to a container 12. As shown in FIGS.

As can be clearly seen from FIG. 6, the pump mechanism 14 includes a cylinder 16 that forms a horizontal flow path and a piston 18 that reciprocates within the cylinder. One end of a suction pipe 20 is attached to one end of the cylinder 16, and the other end of the suction pipe is curved and extends toward the bottom of the container. Although the suction pipe 20 may be attached along the direction perpendicular to the axial direction of the cylinder 16, a configuration in which the suction pipe 20 is attached along the axial direction of the cylinder as shown in the figure is preferable from the viewpoint of molding. Also, by fitting the other end of the cylinder 16 into the mouth 13 of the container 12, the pump mechanism 14
is attached to the container. In this configuration in which the pump mechanism 14 is directly attached to the container 12, the clamping ring and the sprayer body are omitted and the configuration is simplified compared to the conventional configuration in which the sprayer body is attached to the container using a clamping ring. It can be simplified. Note that reference numbers 22 and 24 indicate the cylinder 16 and the mouth portion 1.
The engagement protrusions and holes formed in No. 3 to prevent falling off are shown respectively.

Furthermore, as can be seen from FIG. 6, the trigger 26
is rotatably formed integrally with the other end of the cylinder 16 via a hinge 27. The structure in which the trigger 26 is integrally molded with the cylinder 16 in this manner simplifies the structure because an independent member can be omitted compared to the conventional structure in which the trigger is formed separately from the cylinder. Furthermore, since the nozzle 28 is molded integrally with the trigger 26, the configuration can be similarly simplified.

The piston 18 of the pump mechanism 14 includes a first piston 32 fitted within the nozzle 28 and a second piston 34 fitted within the first piston. Further, the first piston 32 and the second piston 34 each have skirt-like seal pieces 36 and 38 on their outer peripheries that slide into sliding contact with the inner surface of the cylinder 16.
Furthermore, a secondary valve 40 is integrally molded at the tip of the first piston 32. The valve body 42 of this secondary valve 40 is
It is connected to the first piston 32 by three conformally shaped flexible arms 44 (seventh
(see figure). Therefore, under normal conditions, the valve body 42 is biased by the elasticity of the arm 44 to form a seal between the valve seat 46 formed on the first piston 32 and the valve seat. However, the valve body 42 is
Since it extends in the circumferential direction, it can move in the axial direction of the piston 18 away from the valve seat 46.

When the valve body 42 is separated from the valve seat 46 by the pressurized fluid, the valve body comes into contact with a nozzle spinner 48 (see FIG. 8) formed on the back surface of the trigger 26. In this spinner 48, the tangential flow path 50 has an open back surface and therefore does not function as a spinner. However, if the valve body 42 comes into contact with the spinner 48, the back side of the flow path 50 is closed, so it acts as a spinner, and the pressurized liquid is transferred to the flow path 50.
The flow is turned into a vortex by the flow.

Furthermore, a valve rod 52 is arranged freely within the cylinder 16. valve rod 52
As can be clearly seen from FIG. 9, the cylindrical portion has a pair of conical end portions 54 and 56, a square cross-section portion 58 connected to the end portion 54, and a large diameter cylindrical portion connected to the square portion and having an inclined shoulder portion 59. 60, and a small diameter cylindrical portion 62 located between the large diameter cylindrical portion and the end portion 56. Further, a shoulder portion 64 having a curved surface is formed at the connection portion between the end portion 54 and the square portion 58, and a shoulder portion 66 consisting of a perpendicular line is formed at the connection portion between the small diameter cylindrical portion 62 and the end portion 56. The shoulder portion 64 is formed by four protrusions 68 formed on the inner surface of the second piston 34.
The shoulder portions 66 are formed so as to be able to come into contact with radial ribs 70 formed on the inner surface of the cylinder 16, respectively. Further, the shoulder portion 59 of the large diameter conical portion 60 is formed so as to be able to abut against a shoulder portion 72 formed on the inner surface of the cylinder 16, and a primary valve 73 is configured by abutting against the shoulder portion 72. Note that the protrusion 68 is formed so as to be able to come into contact with the outer periphery of the square portion 58.

The piston 18 is biased in the projecting direction by a compression coil spring 74 disposed within the cylinder 16.
Spring 74 is maintained at its free length. An engaging portion 76 is formed at the free end of the trigger 26 . A support bar 80 is formed on the cylinder 16 via a hinge 78, and a corresponding engagement portion 82 that can be engaged with the engagement portion 76 of the engagement portion 76 is formed at the tip of the support bar. A portion 84 of the corresponding engagement portion 82 is formed to be able to engage with an engagement hole 86 formed in the container 12 .

Note that hinges 80 and 82 are formed at the connection between the trigger 26 and the nozzle 28, respectively, and when the trigger rotates around the hinge 27, the piston 18 does not rotate around the hinge 27 and the cylinder is closed. It acts to allow movement along the axis. Hinge 27, 78, 8
0 and 82 are not limited to the illustrated shape, but may have any shape that allows the desired operation. For example, as shown in FIG. 10, they may be formed from a thin portion consisting of a partially annular portion.

The sprayer 10 having the above configuration is used in the following manner.

At the stage of transportation and store, the engaging portion 76 of the trigger 26 engages with the support bar 80 as shown in FIG.
The corresponding engagement portion 82 is engaged with the corresponding engagement portion 82 . In this state, when a pushing force that attempts to rotate the trigger 26 clockwise around the hinge 27 acts on the trigger, the trigger 2 attempts to rotate along an arc indicated by reference numeral 90. However, the support bar 80 can only rotate around the hinge 78 along an arc indicated by the reference numeral 92, and even if the pushing force is applied to the trigger 26, the support bar cannot rotate. Therefore, the trigger 26 cannot be rotated either, and in a state where the engaging portions 76 and 82 are engaged with each other, the trigger does not rotate even if a pressing force is applied to the trigger. Therefore, the trigger does not rotate inadvertently, and unnecessary spraying can be prevented. In other words, child proofing can be achieved. In the embodiment, since the child-proof mechanism is integrally constructed with the pump mechanism 14, the construction can be extremely simplified. Needless to say, this child-proof mechanism can be used not only for virgin locks but also when temporarily discontinuing use. Further, the child-proof mechanism may have a structure in which a support bar 180 is formed on the trigger 26 via a hinge 178, as shown in FIG. FIG. 12 shows an embodiment in which an engaging part 176 of the trigger is engaged with the cylinder 16, and in use the support bar 180 has another engaging part 183 engaged with a corresponding engaging part 185 of the trigger.

In use, the engagement portions 76 and 82 are disengaged and the support bar 80 is rotated clockwise about the hinge 78 so that the portion 84 is inserted into the engagement hole 86 of the container 12.
Engage and lock as shown in FIG. By locking the support bar 80 in this manner, the support bar does not interfere with the rotation of the trigger 26. Then, when the trigger 26 is pulled toward the user, the trigger is rotated around the hinge 27 against the biasing force of the spring 74. Then, the piston 18 is pushed into the cylinder 16 in response to the rotation of the trigger 26, and the volume of the chamber 94 inside the cylinder is reduced. At this time, the piston 18 is connected to the hinges 80, 8
2, it is pushed into the cylinder without rotating around the hinge 27. Thereafter, except for the pushing force on the trigger, the biasing force of the spring 74 causes the piston 18 and the trigger 26 to move as shown in FIG.
Since the chamber 94 returns to its initial position and the volume of the chamber 94 increases, a negative pressure is generated within the chamber. piston 18
When the second piston 34 returns to its initial position, the protrusion 68 of the second piston 34 abuts the shoulder 64 of the valve rod 52 and moves the valve rod together with the piston, causing the shoulder 69 of the valve rod to separate from the shoulder 72 of the cylinder 16. Therefore, the primary valve 73 is opened and the liquid in the container 12 flows into the chamber via the suction pipe 20 and the primary valve due to the negative pressure in the chamber 94. Here, the secondary valve 40 is closed by the biasing force of the arm 44, and the negative pressure within the chamber acts in the closing direction, so that the secondary valve is sufficiently liquid-tight. As the liquid in the container is sucked up into the chamber 94 through the suction pipe 20, the amount of liquid in the container decreases, and there is a possibility that the pressure inside the container becomes negative.
However, a negative pressure hole 95 is formed in the cylinder 16, and when the piston 18 is pushed into the cylinder, the first
As shown in Figure 1, the seal piece 36 is inserted beyond the negative pressure hole.
moves. Therefore, the inside of the container is communicated with the atmosphere through the negative pressure hole 95, and negative pressure is prevented.

Thereafter, when the trigger 26 is rotated counterclockwise around the hinge 27 again, the protrusion 68 of the second piston 34 moves while contacting the outer periphery of the square portion 58 of the valve bar 52. Therefore, due to the frictional force therebetween, the valve bar also moves together with the trigger 26 and the piston 18, and the shoulder 59 comes into contact with the shoulder 72, thereby closing the primary valve 73. Thereafter, as the trigger 26 is rotated, the piston 1
8 enters the cylinder 16 and pressurizes the liquid in the chamber 94. The liquid is pressurized and the secondary valve 40
If the biasing force of the arm 44 is greater than the biasing force of the valve body 42
is moved away from the valve seat 46 to open the secondary valve. Here, the valve body 42 comes into contact with the back surface of the spinner 40 and closes the back surface of the radial flow path 50 (see FIG. 6), so the pressurized liquid flowing out from the secondary valve 40 flows into the flow path 50 and creates a vortex flow. and is sprayed from the orifice 36. Then, by pressing the trigger 26, the liquid in the container 12 is sucked up into the chamber 94, and preparation for the next spraying operation is completed, and by pulling the trigger, the next spraying is repeated.

Note that this sprayer 10 can be used as a dispenser except for the spinner 48. It can also be used as a foamer by causing the liquid that is turned into a vortex and sprayed from the orifice 36 to collide with a foaming means such as a barrier to foam. Furthermore, the pump mechanism 14 may be attached above the container 12 instead of on the side, and the piston 18 may be configured to reciprocate in the vertical direction.

As described above, according to the present invention, the cylinder is integrally provided with the engaging part for the container in the middle part, the attachment part of the suction pipe in one end part, and the trigger in the other end part, and the trigger has a nozzle. It is integrally formed. In such a configuration, the conventional sprayer main body is omitted, and the trigger, nozzle, etc., which were conventionally independent members, are formed integrally with the cylinder, simplifying the configuration and reducing the number of independent parts. Furthermore, it is easy to assemble and the sprayer can be produced at low cost. Furthermore, the present invention can provide a new type of one-way sprayer that maintains the advantages of the conventional two-way sprayer.

It should be noted that the illustrated embodiment merely shows one embodiment of the present invention, and it goes without saying that the present invention also includes substitutions, changes, etc. made within the technical concept of the present invention.

[Brief explanation of drawings]

Figures 1 to 3 show the conventional three-way,
Schematic diagrams of two-way and one-way trigger-type sprayers according to the invention, FIGS. 4 and 5
6 and 11 show the trigger type shown in FIGS. 4 and 5, with the piston in the initial position (extended position) and in the pushed-in position. A partial sectional view of the sprayer, FIG. 7 is a front view of the first piston, FIG. 8 is a back view of the spinner of the nozzle,
FIG. 9 is a perspective view of the valve bar, FIG. 10 is a cross-sectional view showing a modified example of the hinge, and FIG. 12 is a cross-sectional view showing a modified example of the child-proof mechanism. 10...Trigger type sprayer, 12...Container, 1
4... Pump mechanism, 16... Cylinder, 18... Piston, 20... Suction pipe, 26... Trigger, 28... Nozzle, 30... Orifice.

Claims (1)

[Claims] 1 By rotating the trigger, the piston is reciprocated within the cylinder, thereby drawing up and pressurizing the liquid in the container through the suction pipe, and spraying it through the orifice of the nozzle. In a trigger type sprayer, the cylinder has an engaging part for the container in the middle part, a suction pipe attachment part in one end part, and a trigger in the other end part, and the nozzle is integrally attached to the trigger. A trigger type sprayer characterized by: