JP6033747B2 - Trigger type liquid ejector - Google Patents

Description

  The present invention relates to a trigger-type liquid ejector that is attached to a mouth portion of a container that contains a liquid, and in which the liquid in the container is made into a mist or foam and ejected from a nozzle.

  As a blower attached to the mouth of a container that contains liquid such as mold remover, detergent, clothing paste, residential wax, hairdressing agent, fragrance, etc., these liquids can be operated by operating a pump by operating a trigger. There is known a trigger type liquid ejector that ejects a nozzle from a nozzle in the form of a mist or foam.

  Such a trigger type liquid ejector includes an ejector body mounted on the mouth of a container by a mounting cap or the like, and a pump is mounted on the ejector body and suction of liquid sucked and pumped to the pump is performed. A flow path and a delivery flow path are provided, and a nozzle is attached to a delivery outlet which is an outlet end of the delivery flow path. The nozzle is provided with an ejection hole having a smaller diameter than that of the delivery channel, and the liquid pressure-fed by the pump to the delivery port through the delivery channel is ejected from the ejection hole in the form of a mist or foam. Is done. There is also known a device in which a nozzle is rotatably mounted on an ejector body, and the nozzle is rotated to switch opening and closing of the ejection hole.

  In such a trigger type liquid ejector, usually, a suction side check valve is provided in the suction flow path and a delivery side check valve is provided in the delivery flow path, and the suction of the liquid from the container by the suction operation of the pump, Switching between the ejection of the liquid from the nozzle by the discharge operation of the pump is automatically performed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-290731

  However, in the conventional trigger type liquid ejector, a suction side check valve is configured by assembling a ball valve, a valve mechanism, or the like, which is configured separately from the pump and the ejector main body, inside the suction flow path. Therefore, the number of parts increases. Further, since both the ball valve and the valve mechanism are small ones attached to the suction flow path, their handling is difficult and a lot of man-hours are required for the assembling work.

  An object of the present invention is to solve such a point, and an object of the present invention is to provide a trigger type liquid ejector provided with a suction-side check valve easily and with a small number of parts.

  A trigger type liquid ejector according to the present invention includes an ejector body attached to a mouth portion of a container for storing liquid, and a suction flow provided by operating the trigger to cause the liquid in the container to be provided in the ejector body. A trigger type liquid ejector comprising: a pump that sucks from a passage and pumps it to a delivery outlet through a delivery flow path; and a nozzle that is attached to the ejector main body and ejects the liquid pressure-fed to the delivery outlet to the outside. The pump includes a cylinder tube portion and a piston that is formed in a cylindrical shape whose one end is closed and is slidably mounted on the cylinder tube portion in a direction along its central axis. A partition cylinder part is provided on the inner side so that the central axes coincide with each other, and a partition chamber between the partition cylinder part and the cylinder cylinder part communicates with the delivery flow path via a delivery-side check valve. A suction cylinder part connected to the suction flow path inside the cylinder part A suction side check valve is provided at the tip of the suction cylinder part, and the suction side check valve is provided on a tapered valve seat provided at the tip of the suction cylinder part. A hemispherical valve body having a spherical surface to be in contact with, a columnar boss provided to project from the flat surface of the valve body in a direction along the central axis of the partitioning cylinder, and a central axis of the suction cylinder An elastic portion that is formed to be elastically deformable along a direction along which one end is connected to the inner surface of the partitioning cylinder portion and the other end is connected to the valve main body to urge the valve main body toward the valve seat. And the cylinder cylinder part, the partition cylinder part and the suction side check valve are integrally formed by resin molding.

  According to the present invention, in the above configuration, the elastic part is preferably a spiral resin spring centered on a central axis of the partition cylinder part.

  According to the present invention, the spherical surface of the hemispherical valve body is brought into contact with a tapered valve seat provided at the tip of the suction cylinder portion while being urged by the elastic portion, thereby closing the suction cylinder portion. With this configuration, even if the elastic force of the elastic part that presses the valve body against the valve seat is small, the valve body reliably closes the opening end of the suction cylinder part. In addition, the suction-side check valve can be integrally formed by resin molding and the sealing performance by the valve body can be secured. Therefore, the suction-side check valve can be provided in the trigger type liquid ejector easily and with a small number of parts.

  In addition, since the columnar boss part that protrudes in the axial direction of the partition tube part from the flat surface is provided on the valve body, the valve body is brought into contact with the inner peripheral surface of the partition tube part. It is possible to prevent the valve seat from being inclined more than a predetermined angle, and to ensure the sealing performance of the valve body. Further, by providing a columnar boss portion on the valve body, when the cylinder tube portion, the partition tube portion and the suction side check valve are formed by resin molding using a mold, the valve body is passed through the columnar boss portion. Since the resin material can be supplied to this portion, the injection port of the resin material into the mold can be arranged in a wide space away from the valve body, and the moldability of the valve body and the elastic portion can be improved.

It is sectional drawing of the trigger type liquid ejector which is one embodiment of this invention. (A) It is sectional drawing which shows the part of the suction side check valve of the trigger type liquid ejector shown in FIG. 1 in the state which removed the piston, (b) is the valve main body shown to the same figure (a) in a valve seat. It is sectional drawing of the state inclined with respect to.

  Hereinafter, the present invention will be described in more detail with reference to the drawings.

  A trigger type liquid ejector 1 according to an embodiment of the present invention shown in FIG. 1 is a container for storing liquids such as a mold removing agent, a detergent, a clothing paste, a residential wax, a hairdressing agent, and a fragrance. It is used by being attached to the two mouth portions 2a. The trigger type liquid ejector 1 includes a resin ejector main body 11 attached to the mouth 2 a of the container 2.

  The ejector body 11 includes a cylindrical mounting cylinder portion 12 corresponding to the mouth portion 2a of the container 2, and the mounting cylinder portion 12 is locked to a flange portion 12a provided on the outer peripheral surface thereof, and a mounting cap 13 is provided. It is installed. A female screw 13 a is provided on the inner peripheral surface of the mounting cap 13, and this mounting cap 13 is screwed to the male screw of the mouth portion 2 a of the container 2, whereby the ejector body 11, that is, the trigger type liquid ejector 1 is connected to the mouth of the container 2. It can be attached to the part 2a. In addition, the code | symbol 14 is a sealing member which seals between the opening part 2a of the container 2, and the collar part 12a.

  The ejector main body 11 has a substantially L-shaped outer shape including an upright portion 15 extending from the mounting cylinder portion 12 in a direction along the central axis and an extending portion 16 extending in a direction orthogonal to the upright portion 15. Is formed. A suction channel P1 that communicates with the mounting cylinder 12 is provided inside the upright portion 15, and a suction tube 17 that is inserted into the container 2 is connected to the lower end of the suction channel P1. On the other hand, the extending portion 16 is provided with a delivery flow path P2 extending in a direction orthogonal to the suction flow path P1, and a check valve chamber R1 is formed between the suction flow path P1 and the delivery flow path P2. . Note that the suction flow path P1 and the check valve chamber R1 are configured such that a cylindrical body 18 whose interior is divided into two along the central axis of the upright portion 15 by the partition wall 18a is incorporated in the upright portion 15.

  A pump 21 is attached to the ejector body 11. The pump 21 includes a cylinder member 22 that is fitted and fixed between the mounting cylinder portion 12 and the extension portion 16 of the ejector body 11. The cylinder member 22 includes a cylinder tube portion 22a and a partition tube portion 22b disposed coaxially inside the cylinder tube portion 22a, and an annular partition chamber 22c is formed therebetween. The compartment 22c communicates with the check valve chamber R1 through a delivery hole 23 formed in the cylindrical body 18. A cylindrical piston 24 whose one end is closed is mounted on the cylinder tube portion 22a so as to be movable in a direction along the central axis of the cylinder tube portion 22a. On the outer peripheral side of the cylindrical tip portion of the piston 24, a seal portion 24a that is in sliding contact with the inner peripheral surface of the cylinder tube portion 22a is integrally formed.

  A cylindrical suction tube portion 25 is provided integrally with the upright portion 15 of the ejector body 11. The suction cylinder part 25 is arranged inside the partition cylinder part 22 b so that the central axis of the partition cylinder part 22 b coincides with one end side of the suction cylinder part 25 via the suction hole 26 provided in the cylinder body 18. Communicate. The tip of the suction cylinder portion 25 exposed in the pump 21 is a valve seat 25a. The valve seat 25a is a tapered surface (conical surface) that is recessed toward the suction hole 26 as it goes radially inward. The suction side check valve 31 is disposed in the valve seat 25a.

  As shown in an enlarged view in FIG. 2A, the suction side check valve 31 includes a valve body 31a. The valve body 31a is formed in a hemispherical shape having a spherical surface S1 and a flat surface S2 connected to the spherical surface S1, and the suction cylinder portion 25 is configured such that the spherical surface S1 can contact the valve seat 25a of the suction cylinder portion 25. Has a diameter larger than the inner diameter.

  The valve main body 31a is integrally connected to the inner peripheral surface of the partition cylinder portion 22b by an elastic portion 31b. In the case shown in the drawing, the elastic part 31b is aligned with the central axis of the partition cylinder part 22b, and spirally turns in the direction along the central axis, and from the side of the partition cylinder part 22b toward the valve body 31a. The resin spring has a shape that gradually decreases in diameter, and is elastically deformable in a direction along its central axis. The elastic portion 31b is integrally connected to the inner peripheral surface of the partition tube portion 22b at one end portion of the large diameter, and is integrally connected to the flat surface S2 of the valve main body 31a at the other end portion of the small diameter. The valve body 31a is urged toward the valve seat 25a so as to press S1 against the valve seat 25a. With this configuration, the suction-side check valve 31 allows the suction of liquid from the suction flow path P1 through the suction hole 26 into the pump 21 and the suction flow path P1 from the pump 21 through the suction hole 26. It is possible to prevent the liquid from flowing back to.

  Further, a columnar boss portion 31c is provided integrally with the valve body 31a. This columnar boss portion 31c is formed in a columnar shape with a uniform cross section that protrudes from the flat surface S2 facing the opposite side to the valve body 31a to the valve seat 25a in the direction along the central axis of the partition tube portion 22b. Extends to a position adjacent to a connecting portion between the elastic portion 31b and the partitioning cylinder portion 22b. In the normal state, the columnar boss portion 31c is disposed along the central axis of the partition tube portion 22b. However, when the valve main body 31a is inclined with respect to the valve seat 25a, the columnar boss portion 31c has its tip at the partition tube portion 22b. The valve body 31a can be tilted with the valve body 31a within a range of contact with the inner peripheral surface.

  As shown in the figure, in the trigger type liquid ejector 1, the cylinder cylinder part 22a, the partition cylinder part 22b and the suction side check valve 31 constituting the pump 21 are integrally formed of a resin material. As described above, the suction-side check valve 31 is integrally formed of the resin material together with the cylinder tube portion 22a and the partition tube portion 22b, so that the components can be compared with the case where the suction-side check valve 31 is separately provided. The number of points can be reduced, and the number of assembling steps can be reduced.

  Further, by integrally forming the cylinder tube portion 22a, the partition tube portion 22b, and the suction side check valve 31 with a resin material, the elastic portion 31b cannot be formed in a desired shape, and the valve body 31a can be Even if the elastic force of the elastic portion 31b pressed against the 25a is reduced, the spherical surface S1 of the hemispherical valve body 31a is placed on the tapered valve seat 25a provided at the tip of the suction cylinder portion 25 by the elastic portion 31b. By adopting a configuration in which the suction cylinder part 25 is closed by abutting in an urged state, the opening end of the suction cylinder part 25 can be reliably closed by the valve body 31a. Thereby, as a configuration that can ensure the sealing performance by the valve main body 31a while integrally forming the cylinder tube portion 22a, the partition tube portion 22b, and the suction side check valve 31 by resin molding, The suction side check valve 31 can be provided easily and with a small number of parts.

  In addition, as a method of integrally forming the cylinder tube portion 22a, the partition tube portion 22b, and the suction side check valve 31 with a resin material, for example, injection molding using a mold can be used.

  Furthermore, by providing the valve body 31a with a columnar boss portion 31c protruding from the flat surface S2 in the direction along the central axis of the partitioning cylinder portion 22b, the valve body 31a is caused by the flow of liquid during the operation of the pump 21, etc. 2B, a columnar boss portion 31c provided integrally with the valve body 31a is formed in the partitioning cylinder portion 22b, as shown in FIG. 2B. By contacting the peripheral surface, the inclination of the valve body 31a with respect to the valve seat 25a can be restricted within a range of a predetermined angle. Thereby, it can prevent that the valve main body 31a inclines too much with respect to the valve seat 25a, and can maintain the sealing performance in a favorable state.

  Furthermore, when the columnar boss portion 31c is provided integrally with the valve body 31a, the cylinder tube portion 22a, the partition tube portion 22b, and the suction side check valve 31 are integrally formed by resin molding using a mold. A resin material inlet is disposed at the tip of the columnar boss portion 31c, and the resin material can be supplied to the valve body 31a through the columnar boss portion 31c. Therefore, the moldability of the valve body 31a and the elastic part 31b can be improved by allowing the injection port of the resin material into the mold to be disposed in a wide space away from the valve body 31a.

  A delivery-side check valve 32 is provided in the check valve chamber R1. The delivery-side check valve 32 has a plate-like valve body 32a, and this valve body 32a is urged toward the pump 21 by a curved elastic portion 32b to form a step on the inner peripheral surface of the cylindrical body 18. It is in contact. With such a configuration, the delivery-side check valve 32 allows the liquid to be delivered from the pump 21 to the delivery flow path P2 through the delivery hole 23, and enters the pump 21 from the delivery flow path P2 through the delivery hole 23. Prevents backflow of liquid.

  The ejector body 11 is provided with a trigger (operation lever) 34 that is rotatably supported by a pivot 33. A connecting piece 35 is integrally provided on the piston 24, and the connecting piece 35 is rotatably connected to the trigger 34 by a pin member 36 while being inserted into a hole 34 a provided in an intermediate portion of the trigger 34. Yes. The trigger 34 is engaged with the tip of a curved leaf spring 37 whose one end is fixedly held by the ejector body 11. The leaf spring 37 causes the trigger 34 to move away from the pump 21 (in the figure, the pivot axis). (Clockwise direction around the center). The ejector body 11 and the pump 21 are covered with a cover C, and the trigger 34 protrudes from below the cover C.

  When the trigger 34 is manually operated and pulled toward the pump 21 to the stroke end position indicated by a two-dot chain line in FIG. 1, the suction-side check valve 31 is held closed, and the piston 24 is placed in the compartment 22c. The pressure in the pump 21 is increased and the liquid in the pump 21 is sent from the delivery hole 23 to the delivery flow path P2 through the check valve chamber R1. At this time, since a gap is provided between the inner peripheral surface of the piston 24 and the outer peripheral surface of the partition tube portion 22b, not only the liquid in the partition chamber 22c but also inside the piston 24 and the partition tube portion 22b. A large-capacity liquid including the liquid can be delivered toward the delivery flow path P2.

  When the operation of the trigger 34 is released, the trigger 34 is returned to the initial position by the elastic force of the leaf spring 37, and in the return operation, the inside of the pump 21 becomes negative pressure and the delivery side check valve 32 is closed. The suction side check valve 31 is opened, and the liquid in the container 2 is sucked from the suction hole 26 into the pump 21 through the tube 17 and the suction flow path P1. The cylinder tube portion 22a is provided with an intake hole 38 that is exposed to the outside when the trigger 34 is operated to the stroke end, and air sucked from the intake hole 38 is ejected from the cylinder tube portion 22a of the pump 21. The liquid is injected into the container 2 by being sucked into the container 2 through the annular gap between the container body 11 and the vent holes 12b and 12c provided in the upper surface wall of the mounting cylinder part 12. Air is to be replaced.

  As described above, the trigger type liquid ejector 1 of the present invention is attached to the mouth 2a of the container 2, and the pump 21 is operated by repeating the pulling operation and the releasing operation of the trigger 34, thereby sucking the liquid in the container 2. It can be sucked from the flow path P1 and can be pumped to the delivery port 39 through the delivery flow path P2.

  A cylindrical mounting portion 16a is provided at the tip of the extension portion 16 of the ejector body 11, and the nozzle 41 is mounted on the mounting portion 16a in a state in which the nozzle 41 is prevented from coming off in the direction along the central axis. The nozzle 41 is provided with an ejection hole 41a having a sufficiently smaller cross-sectional area than the delivery port 39, and the liquid pumped from the container 2 to the delivery port 39 by the pump 21 is sprayed from the ejection hole 41a to the outside. Is ejected in the form of foam or foam. In addition, it can also be set as the structure which can switch this nozzle 41 to an open state and a closed state by attaching this nozzle 41 to the mounting part 16a so that rotation is possible, and rotating the nozzle 41. FIG.

  A nozzle cover 42 is integrally provided on the nozzle 41 via a hinge portion 43. The nozzle cover 42 can be opened and closed between a closed position that covers the front surface of the nozzle 41 and an open position that is disposed on the upper surface of the nozzle 41. By ejecting liquid with the nozzle cover 42 being the closed position, the nozzle cover 42 can be opened and closed. The liquid ejected from the ejection holes 41a can be effectively foamed by the foam generation holes 42a of the nozzle cover 42.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the embodiment described above, the elastic portion 31b is a spiral resin spring, but one end is connected to the inner surface of the partition tube portion 22b and the other end is connected to the valve body 31a. Any other shape such as a bellows-like resin spring or a mesh-like resin spring can be used as long as it can bias the valve seat 25a.

DESCRIPTION OF SYMBOLS 1 Trigger type liquid ejector 2 Container 2a Mouth part 11 Ejector main body 12 Mounting cylinder part 12a Gutter part 12b, 12c Vent hole 13 Mounting cap 13a Female screw 14 Sealing member 15 Standing part 16 Extension part 17 Tube 18 Cylindrical body 18a Partition wall 21 Pump 22 Cylinder member 22a Cylinder cylinder part 22b Partition cylinder part 22c Partition chamber 23 Delivery hole 24 Piston 24a Seal part 25 Suction cylinder part 25a Valve seat 26 Suction hole 31 Suction side check valve 31a Valve body 31b Elastic part 32 Delivery side check Valve 32a Valve body 32b Elastic part 33 Pivot 34 Trigger 34a Hole 35 Connecting piece 36 Pin member 37 Leaf spring 38 Intake hole 39 Outlet 41 Nozzle 41a Ejection hole 42 Nozzle cover 42a Foam generation hole 43 Hinge part P1 Intake passage P2 Delivery Flow path R1 Check valve chamber S1 Spherical surface S2 Flat surface C Cover

Claims (2)

An ejector body mounted on the mouth of a container for storing liquid, and an operation unit that operates by operating a trigger to suck the liquid in the container from an intake passage provided in the ejector body and send it through a delivery passage. A trigger type liquid ejector comprising: a pump for pumping to a nozzle; and a nozzle that is mounted on the ejector body and ejects the liquid pumped to the delivery port to the outside,
The pump includes a cylinder tube portion and a piston that is formed in a cylindrical shape whose one end is closed and is slidably mounted on the cylinder tube portion in a direction along its central axis.
A partition tube portion is provided on the inner side of the cylinder tube portion so that the central axes thereof coincide with each other, and a partition chamber between the partition tube portion and the cylinder tube portion communicates with the delivery flow path via a delivery-side check valve. And
A suction cylinder part connected to the suction flow path is provided inside the partition cylinder part with the central axis aligned, and a suction side check valve is provided at the tip of the suction cylinder part,
The suction side check valve is
A hemispherical valve body having a spherical surface that abuts a tapered valve seat provided at the tip of the suction cylinder part;
A columnar boss provided to project from the flat surface of the valve body in a direction along the central axis of the partition cylinder;
It is formed so as to be elastically deformable in a direction along the central axis of the suction cylinder part, one end is connected to the inner surface of the partition cylinder part and the other end is connected to the valve body so that the valve body faces the valve seat. And an elastic part that biases
The trigger type liquid ejector, wherein the cylinder cylinder part, the partition cylinder part and the suction side check valve are integrally formed by resin molding.   2. The trigger type liquid ejector according to claim 1, wherein the elastic portion is a spiral resin spring centered on a central axis of the partition tube portion.

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